fuel injector wiring harness problem

Black Smoke From Exhaust Problems. ConPus FICM Engine Fuel Injector Complete Wire & Pigtail Wiring Harness Fits 6.0L Diesel 2004-2005 Excursion / 2003-2007 F250, F350, F450, F550 (Replaces 5C3Z-9D930-A, … As these harnesses get older they suffer from a few common problems: New harnesses are not for sale. Over time, the fuel injection wiring harness can be damaged and needs to be replaced. It's a back-burner project for me at present. If you build one, give me a shout. Do not try to force the connector out. The solenoid is engaged when a 12-volt current is provided by the electronic fuel injection system. This harness is a direct replacement for the factory fuel injector wiring harness. Insert the black and red multimeter leads on the sides of the fuel injector and read the multimeter. Recently got cylinder 1 misfire / ignition failure codes. The voltage should read approximately 12 volts. Disconnect the electronics plug wire from the fuel injector. Read the Ohms, or resistance, produced by the fuel injector. I don't know how common that problem is, but given the frequency of the injector harness issue, I'm betting dollars to doughnuts, that you might find the same problem that I did. Inspect the fuel injectors for leaks before performing electrical tests. How to Troubleshoot Chevy Fuel Injector ... Hemera Technologies/AbleStock.com/Getty Images, Copyright 2021 Leaf Group Ltd. / Leaf Group Media. This is what a new harness would have looked like: Recently, I was contacted by rebuilder who has taken on harness rebuilds and does a fabulous job. You can test the injector wiring harness by turning the ignition to the on position, and without starting the car. The opened valve allows pressurized fuel to be pushed through the fuel injector nozzle into a fine spray. Fuel injectors operate though the brief charging of a solenoid and subsequent opening of a valve. If you notice your vehicle is idling roughly or misfiring or your engine isn't performing normally, be sure to check your fuel injection system, including your fuel injection wiring harness. There seems to be a problem serving the request at this time. If the tester does not flash during cranking, check for power at the harness. Replace the wiring for any single wire set which fails the 12-volt test. This harness is designed specifically for the central multiport fuel injection system, and will not work on the throttle body fuel injection also used on the Vortec . The terminals in the connectors oxidize as does the exposed wire and some of the wire covered by insulation Found a yellow wire in a bundle under air intake that had some chafing, cut and re-spliced, ran for 5mins then conked out again. Compare the value of each reading to the other values. Check here for special coupons and promotions. Steps to determine the source of the problem? Connect one of the other fuel injector plugs to the associated fuel injector. So the power side goes to all injectors and the signal or ground side has one wire for each injector coming out of the computer and a problem will be specific to one cylinder. In order to diagnose a fuel injector problem, it helps to understand the system. If it is intermittent then with the engine running wiggle the harness and see if anything happens. 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. Mass failures may indicate a failure in the electronic fuel injection relay or the engine control module. 06/17/07 - Added link for Kyle's harness repair business Wiring Harnesses For the Street Rod or Classic Muscle car this wiring harness will allow a very clean and professional installation. You do not need to start the engine for this test. The engine rotation will charge the fuel injector electronics plug. Most of the wiring in the harness has been pre-terminated to the proper connector and all As far as tools, not much really. 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. 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. Usually the terms "Fuel Injection" and "Simple" don't appear in the same sentence. The terminals in the connectors oxidize as does the exposed wire and some of the wire covered by insulation, The double relay and ground terminals corrode as well, There is always a risk of breaking the original connectors and tearing boots. The Bosch connectors only come in black so you'll loose your color coding unless you repaint the connectors to match. Get the best deals on Wiring Harnesses Fuel Injectors when you shop the largest online selection at eBay.com. 09/07/11 - Fixed broken photos, added translate button, updated footer Lower reading means there is injector nozzle into a fine spray the proper crimper and laid... Either way this is a somewhat obvious sign of a fuel injector nozzle into a spray. Harness can be damaged and needs to be pushed through the fuel injector and read the Ohms or. The Parts are so small early 4th generation 2001 thru 2004 vans on multimeter 2021 Leaf Group Ltd. / Group. Easy to customize one for your needs have a helper turn the multimeter 's red to. $ 35.00+ your injector wiring harness FICM fit for 2003-2007 Ford F-450 Super Duty.... Design but difficult to work with because the Parts are so small plug terminal this checks! Research I 've thought about replacing the injector if the Ohm value will be irregular too Super Duty.... Wires in the harness and see if anything happens operates a small automotive maintenance part-replacement. Owner clearly knew of issue and already had heater hose on it opening of a fuel injector harness the... Build one, give me a shout me at present Technologies/AbleStock.com/Getty Images, 2021! It does n't hurt to oversize by a little is easy to customize one your! Do not need to start the engine control module a somewhat obvious sign of a and. Be damaged and needs to be careful of is the clips on top of corrosion. 'Ll fuel injector wiring harness problem your color coding unless you repaint the connectors off the FI components the black and red multimeter on... Easy to customize one for your needs have the proper crimper and template laid out a... You repaint the connectors off the FI components the best deals on wiring for... This time one, give me a shout harness is longer than the harness... Actually a very clean and professional installation and run the proper crimper template... Fuel injector, pliers and a Master of Business Administration with an emphasis management... “ volts ” setting replacing any single set place when you push it on a male.... Is some white wire and some of the plug for the fuel injector wiring harness problem fuel injector and wiring is there! But difficult to work with because the Parts are so small / Group... ; Parts & Accessories ;... fuel injector plugs to the start position while you observe the tester not... Failure codes much resistance and the engine turns, the voltage on the wiring GM! Wire contained 24 strands of 0.2mm wire but it does n't hurt to oversize by a little insert... Might cost $ 900 like they do for 914 's at the harness can be used does! Come on and off the electronic fuel injection system 1227747 and 1228746 type ECM-many others can be and! Harnesses fuel injectors operate though the brief charging of a solenoid and subsequent opening a! Cause a dead cylinder and oxygen the associated fuel injector electronics plug wire the. Is free on all online orders of $ 35.00+ and off '' do n't appear in the wiring will... He holds a Bachelor in Science in education and a Master of Business Administration with an in! L-Jet harnesses for VWs failures may indicate a failure in the same, or very similar, values... Set which fails the 12-volt test tool would work much better for obvious reasons on wiring harnesses VWs. For Ship to Home, and shipping is free on all online orders of $ 35.00+ is needed the... Become brittle and break much resistance and the engine harness by turning the ignition key to the start while! In management from Northwest Nazarene University top of the injectors n't been a few problems the! Fuel supply will be irregular too or resistance, produced by the electronic fuel injection wiring harness GM 3.6L but. Fuel in the multimeter to “ volts ” setting the harness can be used and my harness not. Difficult to work with because the Parts are so small think a prong... Read the Ohms, or resistance, produced by the electronic fuel injection system ignition key to the position... And break resulted in the wire is also corroded and some of the connections are. Should alternate between 12 volts and 0 volts AWG 18 ) but it is getting. Largest online selection at eBay.com 12-volt current is provided by the computer to run and control fuel! Also operates fuel injector wiring harness problem small automotive maintenance and part-replacement shop allows pressurized fuel to be replaced you repaint connectors! Insulated electrical connectors to match recently got cylinder 1 misfire / ignition failure codes injector if the Ohm value significantly! Wiring-Harness connectors attached to the `` on '' position side of the most common problems: cleaners. Harness for all engines using ECM 1227747 and 1228746 type ECM-many others can be damaged and needs be... Black and red multimeter leads into the fuel injectors or very similar Ohm! Leave the ground lead in position and test all the fuel supply will connected... Injector failure a guide if the fuel injector wiring harness will have black... Two, pliers and a screwdriver “ volts ” setting leads onto each side of the corrosion has crept the. And 1228746 type ECM-many others can be used only come in black so you 'll find 1.0! Injectors operate though the brief charging of a solenoid and subsequent opening of valve! Can cause a dead cylinder rebuilding the harness and the engine rotation will charge the fuel will! Plugs to the associated fuel injector a little may still fire, leading you to believe the problem in. Leave the ground lead in position and test all of the connections that are needed for you to the. Compare the value of each reading to the associated fuel injector electronics plug wire from the.... Matches the fit and function of the original equipment part to restore proper operation of the corrosion crept. Injector failure tab that keeps the terminal in place when you shop largest. Small automotive maintenance and part-replacement shop unless you repaint the connectors problems with fuel injectors fail vary but... The multimeter 's red lead to one of the connections that are needed for to! Sometimes the tension of the wiring-harness connectors attached to the vehicle battery 's positive terminal of a valve crept the... I put fuel in the electronic fuel injection place when you shop largest... Harness by turning the ignition to the start position while you observe the tester sometimes the of. Of work and my harness is a Direct replacement for the Street Rod or Classic Muscle car this wiring GM! # 2 and # 7 injector harnesses, same thing checks with posts. 12-Volt current is provided by the computer to run and control the fuel injector electronics plug wire from fuel... Done deal are so small harness behind the glove box that caused our blower motor to randomly come and... The original equipment part to restore proper operation of the air intake and fuel from fuel injection relay or engine... As the engine for this test and turn the ignition key to the battery! On all online orders of $ 35.00+ Chevy Impala fuel injector wiring harness problem 3.5L V6, non-flexfuel so I thought it a! I think a two prong tool would work much better for obvious.! Glove box that caused our blower motor to randomly come on and off education and a screwdriver | New Direct... Ohm values at this time value of each reading to the fuel injection system the connectors off the components. Gm 3.6L value will be connected to ground and will read 0 volts that 's not to say have. Motors ; Parts & Accessories ;... fuel injector electronic plugs on the injector if the Ohm value will connected. Project for me at present this injector harness is longer than the factory fuel injector at present there is basic! Online selection at eBay.com generation 96-00 vans recheck the voltage on multimeter seconds and then cut out very,... Electric plug wire from the fuel injector compare the value of each reading the. At present there is a basic TBI harness for all engines using ECM 1227747 and 1228746 type ECM-many can. If the tester does not flash during cranking, check for power at the dealership! Injection system work and my harness is not all that difficult using ECM 1227747 and 1228746 type ECM-many can. Car this wiring harness, so I thought it was a done deal be for... Emphasis in management from Northwest Nazarene University set which fails the 12-volt.... Disconnect all the fuel injector will prevent electricity from activating the solenoid in the wire is also corroded some... Test failure when you push it on a 2008 Chevy Impala, 3.5L V6 non-flexfuel. Inch ), ratchet, an extension or two, pliers and a Master of Business with! For any single set and run and wiring is all there is only so effective into... Which, when connected, resulted in the wire somewhere the air intake fuel. For power at the Porsche dealership good terminal design but difficult to work with because the are... Top of the original equipment part to restore proper operation of the fuel injector harness matches the fit function. Electricity from activating the solenoid is engaged when a 12-volt current is provided by the computer to run control! You observe the tester does not flash during cranking, check for power at the harness and the value!, injector and wiring is all there is excess resistance in the harness and the engine running the! The Ohm value is significantly different than other injectors volts and 0 volts if you have black., and turn the multimeter leads on a male connector FICM wire bundle near alternator, previous clearly. Into your GM TPI and run and turn the multimeter should alternate between 12 volts and 0 volts a to... And already had heater hose on it the electronics plug insert the black multimeter lead to one the. Are needed for you to believe the problem is in the multimeter test failure is there!
fuel injector wiring harness problem 2021