fuel injector cleaning,fuel injector rebuild,cleaning fuel injectors,fuel injector service,fuel injectors,oklahoma, fuel injection service, fuel injection cleaning, bmw fuel injectors, fuel injector cleaning services
ALFA ROMEO
AUDI
BMW
PORSCHE
SAAB
TOYOTA
JAGUAR
VOLVO
FIAT
DATSUN
CHEVROLET
FORD
DODGE
MITSUBISHI
VOLKSWAGEN
HONDA
#1 in FUEL INJECTION & PERFORMANCE
OKINJECTORS is a full service fuel injection shop located in Oklahoma. We ultrasonically clean, flow test and replace all injector parts and hardware, so they perform like new. This service is far less expensive than buying new fuel injectors, and is as equally beneficial to your vehicle's performance.
- Top Feed Fuel Injector Overhaul Service ($22 per injector)
- Hose Feed Fuel Injector & Fuel Rail Overhaul Service
- Motorcycle Fuel Injector Overhaul Service
- Marine Injector Services
- Fuel Injection System Accessories
- L-Jetronic & Motronic Technical Support
- Specialized services for Alfa Romeo, BMW, and many others
There are quite a few places offering fuel injector cleaning and flow checking. However there are a few factors that make us different.
First of all we warranty all injectors we service for a 12 month period. If an injector fails for any reason during that time, send it back and we will service it again at no charge, if we can't fix it you will be issued a refund.
Second, We use the correct fluids for both the ultra sonic injector cleaner and flow checking. These fluids cost about $20 a quart so most shops don't like to use them. The correct fluids don't damage the injector's internal seals. Incorrect fluids tend to damage the internal injector seals leading to eventual external leaks, usually about 6-8 months later. When you see really low prices on injector service, just do the math. Do you really think someone is using $20 a quart fluid and charging $10 an injector for service?
Third, we flow check your injectors at a variety of settings, not just at max flow. We check them at idle, cruise, and full throttle from 1000rpm up to 8000rpm. If there is a problem we will find it. We know the proper injector durations for all these conditions and we check your injectors accordingly.
We also include a flow test results sheet showing how your injectors performed on all levels of testing.
In summary, we will do the best, most complete job possible, and we warranty our work.
*There is no effective and complete on car test for fuel injectors. Only when they are off the car can they be properly evaluated. Many shops will offer to perform a "balance check", however this only compares each of the engine's cylinders against each other. It does not directly compare the injectors. It will not reveal equally clogged injectors, and it can only reveal problems at idle. Worse yet, because individual variations in the cylinders are always present on an older car, these variations often mask injector problems making the balance check nearly worthless on older cars. The injector balance check is very useful for finding a really bad injector on a nearly new engine, which is what the dealers are usually looking for.
There are instructions on how to perform a balance check in our Motronic tech article, which can be linked from the Tech page.
OKinjectors Fuel Injector Service Guidelines:
* OHM Testing for maximum electrical performance
* Old Internal Filters, O-rings, and Pintle-Caps removed
* External Cleaning of Injector Body (To remove rust, old paint, and other debris)
* Internally Cleaned with Ultrasonic Cleaning Technology during pulse and rpm simulation
* Reassembled with New Internal Filters, O-rings, Pintle Caps and other appropriate seals or accessories
* Flow Check/Spray Test to verify proper atomization (Before/After Cleaning) Detailed Flow Data Sheet Provided
* All Injectors are Flow Tested Throughout the RPM Range and at all Throttle Positions, Pulse Widths and Simulated
Driving Conditions
* Pressure Check/Leak Testing at maximum psi levels (Before/After Cleaning)
* Backflushing to remove remaining debris
* Safe Shipping
* 12 Month Warranty
-Alfa Romeo GTV6, Milano, BMW E12, early E24, E23, Datsun 280Z ZX, most 80's Nissans, and a lot more...
-Alfa Romeo Spider Specific
Most 80's BMW from 1982 on, various Porsches, etc.
The Bosch L-Jetronic system is used on all U.S. Spec Alfa Romeo GTV6s, Milanos, and 1982-1989 Spiders, BMW E12 5 series and various 3 series cars, The Datsun 280Z and 280ZX, All U.S. spec fuel injected Fiats and Lancias, The 1984-1989 Nissan 300ZX, The Toyota Supra Mark 1 and many others.
Like all cars with L-Jetronic our Alfas have one injector per cylinder. These six injectors all open and close at the same time when commanded to do so by the ECU. It's important to understand that the injectors do not really spray fuel, they are just valves that open and close. They are needle valves that plug a small hole when closed. They are opened by a tiny electromagnet in each injector that pulls the needle away from its hole enabling fuel to pass into the intake system. When they are open fuel sprays in as a result of fuel pressure, so it's really the pump and fuel pressure regulator that control how much fuel sprays in for a given amount of time when injectors are open. The ECU regulates how much fuel is sprayed in by controlling the amount of time the injectors are open. Your ECU assumes your car has the correct amount of fuel pressure. If you have more or less it will effect your ECU's calculations. The injectors are located under the intake plenum. They each have a short black fuel line connecting them to the fuel rail and a Grey colored Bosch electrical connector plugged into them. It's not possible to fully test your injectors with them on the car, although the tests that are possible are described here.
An injector can go bad in a number of ways. *They can have external leaks, internal leaks, fail to open, or fail to close or be clogged with combustion debris. Symptoms of a bad injector or injectors can include difficult or impossible cold or warm starting, irregular idle, lack of power, poor fuel economy, missing, high emissions and external fuel leakage.
Most external leakage is caused by a failed "O" ring inside the injector. This ring seals the plastic part of the injector to the metal part and it is not replaceable. I have heard of people sealing these leaks by coating the outside of the injector with epoxy but I would just buy a new injector. It's a shame Bosch designed the injector so you can't get at this seal without destroying the injector.
It's important to check the injectors internal electrical coil. This is simple, just get out your trusty OHM meter, remove the injector's electrical connector and check the resistance between the injector's terminals. It should be 2-3 OHMs. If it's not you will have to buy a new injector because there is no way to replace the coil.
If your injector is leaking internally or failing to close fully the car might run OK depending on just how bad the problem is. The way to check for this problem is simple. When you change spark plugs inspect them. If one or two are a lot blacker then the others you probably have a leaking injector on those cylinders.. If the leak is bad or the injector never closes, the car will run poorly at low RPM but improve at high RPM when the engine is sucking in enough air to burn the fuel.
The GTV6 can run pretty well with one injector stuck closed, it can even run with three injectors stuck closed although you will know something is wrong. It's a little tougher to tell if an injector is stuck closed by looking at the plugs so let's use another method. We can partially check the injectors by peforming a "ballance check". This will not tell us if all the injectors are eqally poor, but it will tell us if one injector has a serious problem. With the engine running remove the injector plugs one at a time and note the rpm drop. If all of the cylinders drop equally then the injectors are all about the same (assuming the engine's cylinders are all in the same condition). This is not a precise test, and will usually only find gross problems. Of course before you go and remove the injector you should make sure the cylinder in question is getting a spark. To do this hook up the timing light as described in Step 8 only connect it to the spark plug wire going to the cylinder in question. Have a friend start the car and blip the throttle. Watch the light on the timing light. It should flash in a consistent pattern and increase in frequency with an increase in RPM. If it does and your spark plug is sparking then the problems is almost certainly the injector.
The most common injector problem and the most difficult to detect is the partially clogged or "dirty" injector. Unfortunately there is no practical way to check for this problem without pulling out the injectors so we need to use the process of elimination. If you have checked everything else out and your car still has some running problem then it's probably one or more dirty injectors. Putting injector cleaner in the fuel tank will not clean the injectors. On the contrary, it will usually wash fuel system debris into the injector's filters. Once debris is in those filters, it can't get past. The filter's screen has holes too small to see with the naked eye, almost nothing other than fuel can get through.
If you find one or more bad injectors there is little choice but to buy new ones. Let's get one thing clear, THERE IS NO SUCH THING AS A REBUILT L-JETRONIC INJECTOR! Now I know a lot of people claim they are selling rebuilt injectors, and I don't know what they are doing. However I do know that only a few things can be done to them. They can be cleaned, the tiny filter can be replaced, a new pintle cap (tip) installed and the varoius external seals and spacers can be replaced.
I offer fuel injector flow checking, and overhauls on the latest type of machine for Alfa owners. I have started a small fuel injector servicing shop. I have the latest flow checking and injector cleaning equipment. Details are at www.okinjectors.com . The website is not fully developed but you can call us anytime, the operation is up and running.
We can flow test, and or overhaul your injectors. The overhaul includeds ultrasonic cleaning, new inlet filter, pintle cap, and all seals for a very good price. I very thouroghly check the injectors at all the RPM levels and pulse widths your injectors will experience on the car. Most shops on check them at idle. I also warranty the injectors I service for 12 months. I have found that when injectors are serviced by other shops they often start to leak about 6 months after the service. This is because the internal seals are delicate and can be easily damaged by the fluids many shops use to clean and flow check. The correct fluids to test and clean these early injectors are $20 a quart so many shops don't bother to use them. I do, that's why I can warranty the injectors I service agaist external leakage, or any other problems. Most Bosch injectors in a given set will flow within about 3% of each other. For hardcore applications it's possible to get the injectors within 1% of each other. This normally involves selecting a matched set from a number of injectors. We can provide this service, and we recommend it for high compression or high boost applications.
Read More at http://www.hiperformancestore.com/Ljetronic.htm
The article covers the E28 535i. With a few minor variations the same Motronic system is used on many other BMWs from the 1980's including the BMW 533i, 633i, 733i, 635i, 735i, 528e (Note: some early 533, 633, 733 BMWs use Bosch L-Jetronic. Please refer to my L-Jetronic tech articles for those cars.) Various BMW E30s, the the 325i and 325e use Motronic, however they are set up differently. Most of the component tests in this article are relevant for the Motronic E30s, however the locations of the components will usually be different. I will try to point out the variations in these cars within this article, but there is no way I can nail every variation.
There were many other cars built in the 80's and early 90's using this same basic fuel injection and ignition system including the Alfa Romeo 164, Rolls Royce Silver Spur, and others. The Japanese built clones of this system under license and many Japanese cars from the 90's use this system. Some BMW 635 cars use the Motronic 1.3 system. It's essentially the same as the 1.1 system. In some cases, it still uses the cold start valve/injector, unlike the 1.1 system in the 528e. The big change in the 1.3 system was its ability to store more fault codes, and keep them in memory when the car is shut off. To allow it to do this, the 1.3's ECU (electronic control unit, which is the "Motronic Control Unit", or fuel injection and ignition computer) is hard wired to the battery, so it always has voltage if the battery is charged and connected.
Fuel Injector on and off car checks.
If you have been following this article from the start, your car is now free of vacuum leaks, the injection system powers up properly, the grounds are good and it has good fuel pressure. Next we need to look at the fuel injectors. *Fuel injectors are another major component of the injection system, and they can cause a wide range of problems including difficult hot or cold starting, irregular idle, low power, high emission, poor fuel economy, stalling, and the starts and stalls syndrome. The injectors work by opening and closing at a rate and duration specified by the Motronic ECU. When open, fuel under pressure sprays in. The injectors can develop external leaks, they can stick open, stick closed, they can stick a little bit so they don't open and close at the correct rate, they can leak internally, and most common they can be partially clogged so they don't flow the correct amount of fuel.
A word of caution. Each injector has it's own fuel filter. The filter's inlet screen is so fine the holes are not visible to the naked eye! DO NOT put fuel system cleaner or fuel injector cleaner in your E28's fuel tank. All this will do is wash debris that's been building up for all these years downstream into these tiny filters. At least it will tend to clog all the filters equally, and this may actually improve running if it's masking another fault, however partially clogged injectors will not deliver enough fuel at full throttle and if knocking occurs as a result you could have serious engine damage. Trust me on this one, don't use these products on older cars. Well, I guess there is one exception to this. If you are going to pull and have your injectors cleaned anyway, it wouldn't hurt to use these products right before you did that. That would clean out the fuel system and since you are having the injector filters replaced there won't be any harm.
The bad news is it's not possible to fully test the fuel injectors with them on the car. The good news is there are a couple checks we can do with them on the car, and these checks are pretty good at finding some of the more serious possible problems.
First, we need to check the injectors' electrical impedance. Once again you will need to get out your OHM meter. We do this test first because if the injector fails this test, it's junk and can not be fixed. Start by locating the injectors. There will be one per cylinder, meaning on all E28s sold in the U.S. there are six main fuel injectors (there is also a 7th injector called a "cold start valve" which we will cover later). The injectors are easy to find, they are all attached to the fuel rail so look for the fuel pressure regulator which is attached to the front end of the fuel rail. Follow the rail back until you find all six injectors. Each injector has an electrical connector on it.
Remove the injector's electrical connector. Be careful, it's held on with a tiny metal retaining clip. This metal clip must be removed before you pull the connector off or damage to the connector will result. Use a really small screwdriver to pry the clip away. Don't drop it! Well, you probably will drop one at some point, so have a magnet nearby. Once the clip is off you can see the injector has a two terminal electrical connection. We need to measure the resistance between these two terminals. It should fall within the following values. For the 528e with Motronic 1.1, and all 535i cars resistance should be between 14.5 and 17.5 ohms. If you have a 528e with Motronic Basic, or a 633i the values should be between 2 and 3 ohms. Test for these values with your OHM meter, be sure to test for resistance between the terminals on the injector. DO NOT touch the ohm meter to the wiring harness' connectors. If an injector fails this test, it's junk and must be replaced. Also, don't reinstall those metal clips yet. You will need those to be off the the next test.
The second check we can perform is something called a "balance check". This is the same check the dealers perform. It's pretty easy, but it does have some serious flaws. First of all, it only compares the injectors against each other. So if they are all partially clogged it won't help us. Second, if your engine and ignition system are not in like new condition the results will be unreliable. Of course since dealers tend to work on newer cars they love this test. The cars they usually deal with are newer and thus don't usually have clogged injector issues or worn out engines or ignition systems. Now, if your car has one or two really bad injectors this test will find the problem, so it is a helpful test.
To perform a balance check you will need to be able to easily pull off each injector's electrical connector. That means before you start this test you need to remove each little metal clip securing the injector's connector. Leave the connector on the injector, without the clip, start the engine and let it fully warm up. Once it's fully warmed up and idling very steadily, remove each injector's connection one at a time and note the RPM drop. Now in a perfect world the cylinder with the LOWEST RPM drop is the one with the worst injector. In other words, if the RPM does not drop at all, then it stands to reason that fuel injector is not delivering any fuel. I can't stress enough the flaw in this test is the lack of a perfect world situation on a 20 year old car. It could be the lowest RPM drop is on a cylinder with a really good injector but poor compression, or a weak spark. Heck it could just be time for a new cap, rotor, and spark plugs. This test has one other BIG flaw. It only tests the injector when it's under low demand. It's not unusual for an injector to work perfectly at idle but poorly under high demand conditions (i.e., full power, high rpm), which is they way I drive my BMW.
In order to really thoroughly test fuel injectors I am afraid they must be off the car and tested on a machine that can measure their output within the operating ranges of fuel pressure, duration, and RPM.
I offer fuel injector flow checking and overhaul service on the latest type of machine for BMW owners. I have a fuel injector servicing shop. I have the latest flow checking and injector cleaning equipment. Details are at www.okinjectors.com . We overhaul BMW injectors with the correct parts!
If you would like your injectors overhauled I can ultrasonically clean them, replace the filters, pintle caps, and all seals for a very good price. I very thoroughly check them all all the RPM levels and pulse widths your injectors will experience on the car. Most shops only check them at idle. I also warranty the injectors I service for 12 months. I have found that when injectors are serviced by other shops they often start to leak about 6 months after the service. This is because the internal seals are delicate and can be easily damaged by the fluids many shops use to clean and flow check. The correct fluids to test and clean these early injectors are $20 a quart so many shops don't bother to use them. I do, that's why I can warranty the injectors I service against external leakage, or any other problems.
After a full overhaul, old BMW injectors usually work like new and our warranted for 12 months.
The only way to have a known good set of injectors is to have them flow checked at a variety of rpm and duration levels, and at the correct fuel pressure values. Obviously it's important that the person testing them knows what these values should be. It's also important that the injectors be cleaned and flow checked with the correct types of fluids. (Obviously we can't use gasoline or we would blow ourselves up.) The correct fluid for BMW injectors is about $20 a quart. That's so expensive a lot of injector shops just don't use it. Using the wrong fluid tends to damage the injector's internal seals resulting in external leakage about 6 months later. They tend to develop these leaks between the injector's metal body and plastic cap. At my shop we use the correct fluids, that's one of the reasons we can warranty the injectors we service. Also, the correct fluid has to have the same specific weight of gravity as gasoline or the flow checking results will be meaningless compared to original specs.
New injectors: New Bosch injectors are expensive, but they are high quality. There are various other brands that can substitute for the 535's Bosch injectors. These other injectors that will physically fit and are so close in flow rate that they will work. The only drawback is that the Bosch injectors seem to be more precise. The Bosch injectors are usually within 3% of each other, the other brands tend to be within 5% of each other. For serious performance applications I like to flow check a couple dozen injectors and pick the six that are closest to each other. This normally allows me to get injectors within 1%.
Read more at http://www.hiperformancestore.com/Motronic.htm
918-760-0668
toby_okinjectors.com
10763 Sahoma Lake Rd.
Sapulpa, OK 74066
United States
REMANUFACTURED FUEL INJECTOR SETS
Choose from one of our remanufactured fuel injector sets. All of these injectors are remanufactured according to our servicing guidelines. Choose your fuel injectors according to part number to acheive the best fit and performance for your vehicle.
Our Promise for Perfect Performance
We ensure that our remanufactured injectors flow at approximated stock specification data or better. We strive for less than 1% difference in our fuel injectors, and our remanufacturing process guarantees that our fuel injectors perform more efficiently and more beneficial to your vehicles performance on all levels. We provide a detailed information flow sheet so you know exactly how your injectors perform on all levels of operation. All fuel injectors receive our 12 Month Warranty.
Fuel Injector Hose Repair Kit
* NEW Fuel Injector Hose Repair Kit (for all 81-89 Alfa Romeo Spider, GTV6, Milano and Datsun/Nissan 280Z 280ZX and 300ZX 75-89 injectors) * Kit includes: (1) Injector Fuel Hose, (2) Ferrules (or compression fittings)for both hose ends, (1) Fuel hose clamp * These are very high quality hoses and fittings * Your injectors deserve the best! We're here to help you protect your investment. Over time, the fuel hoses and fittings on your fuel injectors wear, harden, and even crack due to aging and driving. When restoring your injection system, it's important to ensure that these parts do their job properly and help your engine run smoothly.
$8.95
Fuel Injector Upper and Lower Seal Kit
* NEW Bosch Fuel Injector Upper & Lower Seal Kit (for 75-78 Datsun 280Z, 79-83 280ZX, and 84-89 Nissan 300ZX)(Also Alfa Romeo Spider, GTV6, Milano 81-89) * These are very high quality upper & lower seals. Most seal kits are thin, elastic imitations. * Your injectors deserve the best! We're here to help you protect your investment. Over time, the upper and lower seals on your fuel injectors wear, harden, and even crack due to aging and driving. When restoring your injection system, it's important to ensure that these seals do their job properly and help your engine run smoothly.
$10.95
Bosch Type II Fuel Injector Repair Kit
* NEW Fuel Injector Repair Kit (for all Bosch Type 2 injectors) * Kit includes: (1) Filter Basket, (2) Fluoro Carbon O-Rings (upper&lower),(1) Spacer (1) Pintle Cap * These are very high quality injector parts! * Your injectors deserve the best! We're here to help you protect your investment. Over time, the filters and seals on your fuel injectors wear, harden, and even crack due to aging and driving. When restoring your injection system, it's important to ensure that these parts do their job properly and help your engine run smoothly.
$4.5
Bosch Type III Fuel Injector Repair Kit
* NEW Fuel Injector Repair Kit (for all Bosch Type 3 injectors) * Kit includes: (1) Filter Basket, (2) Fluoro Carbon O-Rings (upper&lower),(1) O-ring Retainer Cap * These are very high quality injector parts! * Your injectors deserve the best! We're here to help you protect your investment. Over time, the filters and seals on your fuel injectors wear, harden, and even crack due to aging and driving. When restoring your injection system, it's important to ensure that these parts do their job properly and help your engine run smoothly.
Bosch Pigtails Quick Release PT1 EV1
* NEW Bosch Quick Release Pigtails PT1 EV1 * These are very high quality injector parts! * Your injectors deserve the best! We're here to help you protect your investment.
$9.75
Bosch Pigtails PT1 DRI
* NEW Bosch Pigtails PT1 DRI * These are very high quality injector parts! * Your injectors deserve the best! We're here to help you protect your investment.
$3.5
