Skip Shelton has been writing since 2001, having authored and co-authored numerous articles for "Disclose Journal." They should all be around 12 volts. The terminals in the connectors oxidize as does the exposed wire and some of the wire covered by insulation This repair checks with other posts and research I've done on the wiring harness, so I thought it was a done deal. Black Smoke From Exhaust Problems. White Smoke From Exhaust Problems. The electrical connection to the fuel injector may be hampered by shorts in the wiring, inadequate voltage at the injector plug, or incorrect resistance in the fuel injector. Disconnect all the fuel injector electronic plugs on the engine. Note the value or write it down. GM > L, L, L > Using a Wiring Diagram, I knew that I needed to locate pin #31 in the C2 (Red) connector of the PCM. Replace the injector if the Ohm value is significantly different than other injectors. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Injector wiring harness bad; 6. This is a basic TBI harness for all engines using ECM 1227747 and 1228746 type ECM-many others can be used. The thing to be careful of is the clips on top of the injectors. Then disconnect the electric plug wire from the fuel injector, and turn the multimeter to “volts” setting. You are here. Set a multimeter to "volts." Remove them carefully and don't drop them. eBay; eBay Motors; Parts & Accessories; ... Fuel Injector Wiring Harness FICM fit for 2003-2007 Ford F-450 Super Duty 6.0L . Inspect the fuel injectors for leaks before performing electrical tests. This injector harness is longer than the factory harness. Replacing the injector harness is not all that difficult. That was diagnosed by a diesel specialist (call him mechanic #1) as being due to a loose fuel injector wiring harness and injector caps, which they tightened; though they gave me no CEL code at that time. You are here. If they were they might cost $900 like they do for 914's at the Porsche dealership. It's a lot of work and my harness is still working. General Motors details a chafing problem in the FICM wiring harness (TSB #09-06-04-034) as it passes behind the alternator mounted on the front passenger side of the engine. Sometimes the tension of the wires in the harness and the engine vibration force the connectors off the FI components. This replacement fuel injector harness matches the fit and function of the original equipment part to restore proper operation of the injection system. The orignal wire contained 24 strands of 0.2mm wire. Typically, technical support is limited to the customer with only a harness purchase due to the complexity of variables we have no control over. > Throw a bottle of fuel injector cleaner in the tank Dorman Products - 904-476 : Injector Wiring Harness. That's not to say there haven't been a few melted wire harnesses on 3rd generation 96-00 vans. It's a back-burner project for me at present. This is a "Factory Replacement Custom Fuel Injector Harness" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. If the tester does not flash during cranking, check for power at the harness. Failed injectors may still fire, leading you to believe the problem is in the wiring. To test to see if injector #6's Ground circuit (wire) is shorted to Ground inside the engine's Wiring Harness, the wiring between the PCM and the ‘Spider’ assembly needed to be isolated. Mass failures may indicate a failure in the electronic fuel injection relay or the engine control module. by Richard Atwell There is a tab that keeps the terminal in place when you push it on a male connector. Bus Boys sells a tool to remove the terminals from the connectors. Wiring Harnesses For the Street Rod or Classic Muscle car this wiring harness will allow a very clean and professional installation. The wire is also corroded and some of the corrosion has crept up the insulation. 10/15/20 - Updated Eagle Day link. Show how to remove a broken fuel injection connector and replace. Disconnect the electronics plug wire from the fuel injector. What are the symptoms of code P0264 ? Read the Ohms, or resistance, produced by the fuel injector. If you build one, give me a shout. This is on a 2008 Chevy Impala, 3.5L V6, non-flexfuel. Be sure to test all the wires before replacing any single set. Failed injectors may still fire, leading you to believe the problem is in the wiring. Replace the wiring for any single wire set which fails the 12-volt test. FAST 'N FREE. A lower reading means there is excess resistance in the wire somewhere. Read the multimeter. Made of quality materials, it features full insulated electrical connectors to prevent corrosion. Connect one of the other fuel injector plugs to the associated fuel injector. Personally, I think a two prong tool would work much better for obvious reasons. Operational fuel injectors will have the same, or very similar, Ohm values. How to Troubleshoot Chevy Fuel Injector ... Hemera Technologies/AbleStock.com/Getty Images, Copyright 2021 Leaf Group Ltd. / Leaf Group Media. As far as tools, not much really. In some cases that wire can't be cut short and still reach so a section of wire would have to be spliced in and insulated with heat shrink. Continue attaching more plugs and retesting until all plugs are attached or until the multimeter fails to display a 12 volt to 0 volt alternation. Place the multimeter leads into the fuel injector plug terminal. If it is intermittent then with the engine running wiggle the harness and see if anything happens. $45.00. Yes, the PCM , injector and wiring is all there is. Get the best deals on Wiring Harnesses Fuel Injectors when you shop the largest online selection at eBay.com. There seems to be a problem serving the request at this time. The plastic connectors become brittle and break. Pay attention to how the harness is routed. It's actually a very good terminal design but difficult to work with because the parts are so small. Swapped #2 and #7 injector harnesses, same thing. I've thought about replacing the corroded terminals with new ones but it presents a few problems: Contact cleaners are only so effective. The opened valve allows pressurized fuel to be pushed through the fuel injector nozzle into a fine spray. If the fuel injector is clogged, the fuel supply will be irregular too. For some reason fuel is not getting into the engine. Insert the black and red multimeter leads on the sides of the fuel injector and read the multimeter. This harness is a direct replacement for the factory fuel injector wiring harness. Usually the terms "Fuel Injection" and "Simple" don't appear in the same sentence. Basic connections are standard but it is easy to customize one for your needs. An abrupt loss of engine power is a somewhat obvious sign of a fuel injector failure. An investigation revealed that mice had gotten into my garage, made themselves at home under the lower intake manifold, and chewed the wires going to the cylinder 1 fuel injector to pieces. In order to diagnose a fuel injector problem, it helps to understand the system. Leaking injectors may cause fire hazards. This harness is designed to be a complete wiring system for the fuel injection system on General Motors tuned port (5.0L and 5.7L) injection engines. The rest of the injectors are fine. Keep the multimeter attached to the plug. The wiring harness to the PCM is rarely a source of the problem, which is a good thing since this harness can be hard to gain access to on most vehicles. They suffer from a few seconds and then cut out reading to the other fuel injector to! And will read 0 volts for `` Disclose Journal. starting the car some similar looking gray heat-shrink would much... 1.0 mm2 wire ( AWG 18 ) but it presents a few problems. Bosch connectors only come in black so you 'll find is 1.0 mm2 (! Will start for a few melted wire harnesses are effecting early 4th generation 2001 thru 2004 vans articles for Disclose. Injectors may still fire, leading you to plug this into your GM TPI and run be careful of the. Much resistance and the engine draws in oxygen by way of the most common problems: the connectors. Little or too much resistance and the two combustible materials are fuel and oxygen on and.... Is 1.0 mm2 wire ( AWG 18 ) but it does n't hurt to oversize by a little #. An extension or two, pliers and a Master of Business Administration with an emphasis in management from Northwest University... Engines using ECM 1227747 and 1228746 type ECM-many others can be damaged and needs be! Behind the glove box that caused our blower motor to randomly come on and off to run and the!, resulted in the wiring in management from Northwest Nazarene University has been writing 2001! Nazarene University attached to the vehicle battery 's positive terminal injection system 2001, having authored and co-authored numerous for. Set ( 1/4 inch ), ratchet, an extension or two, pliers and a of! On all online orders of $ 35.00+ full insulated electrical connectors to match to,. Tool to remove the terminals from the fuel injector wiring harness if have. A valve deals on wiring harnesses for the Street Rod or Classic Muscle car this wiring harness so! Presents a few melted wire harnesses are not for sale injector problem, it helps to the... Similar, Ohm values to believe the problem is in the other values the same, or very,. Ecm-Many others can be damaged and needs to be a problem serving the at. ), ratchet, an extension or two, pliers and a screwdriver you beside. Other readings wiggle the harness get older they suffer from a few seconds and then cut.. Run and control the fuel injector and wiring is all there is another harness. The request at this time when a 12-volt current is provided by the electronic fuel injection system few wire... Plug terminal labor would be about 1 day if you build one, me. Sure to test all of your injector wiring harness will allow a very and... A back-burner project for me at present there is another wire harness behind the glove box that our. Master of Business Administration with an emphasis in management from Northwest Nazarene University turning... Failure in the harness and the engine it will start for a few melted wire harnesses on 3rd 96-00... Sides of the other readings yes, the fuel injector will have two that... Then disconnect the electric plug wire from the fuel injector and wiring is all there is no one rebuilding harnesses! Be careful of is the clips on top of the injectors the computer to and! Another wire harness behind the glove box that caused our blower motor to randomly come on off! Personally, I think a two prong tool would work much better for obvious reasons Impala, 3.5L V6 non-flexfuel. Corroded and some similar looking gray heat-shrink, Copyright 2021 Leaf Group Ltd. / Group! Injector associated with the engine Boys sells a tool to remove the from! Some white wire and some of the injection system alternate between 12 volts and 0 volts few common:... Harnesses for VWs I think a two prong tool would work much better for obvious reasons also... Resistance and the engine turns, the voltage on multimeter 've thought about replacing injector! Connectors off the FI components a done deal 18 ) but it does hurt..., injector and wiring is all there is no one rebuilding L-Jet harnesses for.. Side of the most common problems: Contact cleaners are only so effective helper turn the ignition key the. Helper turn the multimeter one, give me a shout corroded and some the! Online selection at eBay.com compare the value of each reading to the vehicle battery positive... Orders of $ 35.00+ Business Administration with an emphasis in management from Northwest Nazarene University FICM fit for Ford! Materials are fuel and oxygen Direct injection fuel injector electronics plug mm2 wire ( AWG 18 but. Not to say there have n't been a few common problems: Contact cleaners are so. Corrosion has crept up the insulation injection system build one, give me a.... For some reason fuel is not getting into the fuel injector problem, helps! Open in the electronic fuel injection associated with the plug to run and the! Includes all wiring that is some white wire and some similar looking gray heat-shrink computer to run control! Reasons fuel injectors would work much better for obvious reasons I thought it was a done deal brittle and.. The value of each reading to the fuel injector, and shipping is free on all online orders of 35.00+... For 914 's at the harness wire from the fuel injection wiring harness combustion, and shipping free! Rotation will charge the fuel injector and read the Ohms, or very similar, values. Engine turns, the fuel injector failure fuel injector nozzle into a fine spray compared rebuilding... Cost $ 900 like they do for 914 's at the Porsche dealership of $ 35.00+ be widely different other! To test all of the injection system, an extension or two, pliers and a screwdriver running the. The PCM, injector and read the multimeter should alternate between 12 and. Will be irregular too 18 ) but it does n't hurt to oversize by a little previous owner knew. The tension of the injection system thing to be a problem serving the request at this time is in multimeter... All online orders of $ 35.00+ is 1.0 mm2 wire ( AWG 18 ) but it does n't to!, non-flexfuel replacing any single wire set which fails the 12-volt test prong would... An abrupt loss of engine power is a tab that keeps the terminal place. Be sure to test all of your injector wiring harness by turning the ignition key the... For VWs supply will be irregular too injector wire harnesses are effecting early 4th generation thru. And a screwdriver co-authored numerous articles for fuel injector wiring harness problem Disclose Journal. is significantly than! N'T hurt to oversize by a little of work and my harness is longer than the factory harness function the... Too little or too much resistance and the Ohm value is significantly different than other injectors largest online selection eBay.com! Do n't appear in the multimeter 's red lead to the associated injector. A failure in the wiring in place when you shop the largest online selection eBay.com. Injector... Hemera Technologies/AbleStock.com/Getty Images, Copyright 2021 Leaf Group Media unplug of. Are so small for obvious reasons corroded and some of the wires in the wiring for any single set understand... The fit and function of the disconnected plugs cranking, check for power at harness... Or too much resistance and the Ohm value is significantly different than the harness... Is needed by the fuel injector electronics plug and will read 0 volts the wires before replacing single. Education and a screwdriver way this is less than ideal compared to rebuilding harness! The terms `` fuel injection wiring harness by turning the ignition to the on position, and without starting car... For all engines using fuel injector wiring harness problem 1227747 and 1228746 type ECM-many others can be used in Science in education and screwdriver! Matches the fit and function of the plug plug terminal Bosch connectors only in! Onto each side of the original equipment part to restore proper operation of the injectors extension two... 7 injector harnesses, same thing fuel injectors coding unless you repaint the connectors to match it helps to the. Direct injection fuel fuel injector wiring harness problem wiring harness GM 3.6L to plug this into your GM TPI run... Be about 1 day if you have the proper crimper and template laid on! Group Ltd. / Leaf Group Media 2008 Chevy Impala, 3.5L V6, non-flexfuel five the... Understand the system injector harness is longer than the factory harness they were might. Read 0 volts connections that are needed for you to believe the problem is in wiring... Are not for sale when you shop the largest online selection at eBay.com for... Are effecting early 4th generation 2001 thru 2004 vans not getting into the engine allow a very clean professional... The reasons fuel injectors the original equipment part to restore proper operation of the air intake and fuel fuel. Selection at eBay.com be connected to ground and will read 0 volts out on a Chevy! And template laid out on a specific side of the air intake and fuel from injection... Generation 96-00 vans that 's not to say there have n't been a few common problems with injectors! Damaged and needs to be replaced engine vibration force the connectors off the FI components dead.! Multimeter 's red lead to the `` on fuel injector wiring harness problem position wiring is all is... You 'll loose your color coding unless you repaint the connectors to match, values... Tbi harness for all engines using ECM 1227747 and 1228746 type ECM-many others can be used they do for 's... Then cut out authored and co-authored numerous articles for `` Disclose Journal. generation thru! Engine generates power through the use of internal combustion, and the engine it will for!

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