fuel injector wiring harness problem

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That's not to say there haven't been a few melted wire harnesses on 3rd generation 96-00 vans. The engine rotation will charge the fuel injector electronics plug. Get the best deals on Wiring Harnesses Fuel Injectors when you shop the largest online selection at eBay.com. The strong ones are often harmful to plastics which mean you'd have to remove every terminal from it's connector to apply the solvent or sacrifice a spare connector to test to potency of the cleaner. This is on a 2008 Chevy Impala, 3.5L V6, non-flexfuel. Replace the wiring for any single wire set which fails the 12-volt test. Basic connections are standard but it is easy to customize one for your needs. Unplug one of the wiring-harness connectors attached to the fuel injectors. They should all be around 12 volts. Air intake restriction; Cam – crank sensor; Diesel injector/s bad; EGR problems; High pressure pump bad; Injector blow-by seat leaking; Injector wiring harness bad; Low fuel pressure; Turbo problems – waste gate; 7. The wiring harness will have two terminals that the prongs on the injector insert into. Then disconnect the electric plug wire from the fuel injector, and turn the multimeter to “volts” setting. Do not try to force the connector out. 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. Be sure to test all the wires before replacing any single set. The Bosch connectors only come in black so you'll loose your color coding unless you repaint the connectors to match. 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. Account & Lists Account Returns & Orders. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Yes, the PCM , injector and wiring is all there is. Leaking injectors may cause fire hazards. If the tester does not flash during cranking, check for power at the harness. As these harnesses get older they suffer from a few common problems: The plastic connectors become brittle and break. ... 4 product ratings - Motor Man | New 12629930 Direct Injection Fuel Injector Wiring Harness GM 3.6L. Sometimes the tension of the wires in the harness and the engine vibration force the connectors off the FI components. Failed injectors may still fire, leading you to believe the problem is in the wiring. Steps to determine the source of the problem? The terminals in the connectors oxidize as does the exposed wire and some of the wire covered by insulation It's actually a very good terminal design but difficult to work with because the parts are so small. 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. 09/07/11 - Fixed broken photos, added translate button, updated footer See Kyle Lacey's website: 05/05/04 - Created The original wiring was labelled with numbers so you'll be able to rewire without too much confusion unless they've rubbed off or your harness is so dirty you can't read it. All you need beside that is some white wire and some similar looking gray heat-shrink. This is a basic TBI harness for all engines using ECM 1227747 and 1228746 type ECM-many others can be used. Amazon.com: fuel injector harness. Compare the value of each reading to the other values. If it is intermittent then with the engine running wiggle the harness and see if anything happens. It is not necessary to have the black or red leads on a specific side of the plug terminal. Test all the fuel injector Ohm readings. Operational fuel injectors will have the same, or very similar, Ohm values. An open in the harness can cause a dead cylinder. Because you are testing the current it is not necessary to have a specific lead on a specific side of the plug. What are the symptoms of code P0264 ? Plug the injector-harness tester into the harness connector. The grounds use slightly larger wiring. FAST 'N FREE. The closest you'll find is 1.0 mm2 wire (AWG 18) but it doesn't hurt to oversize by a little. If there is any resistance then the tab is still engaged and any extra force will cause it to bend over and break when you try to bend it back. You are here. 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. 00:00. This includes all wiring that is needed by the computer to run and control the fuel injection system. Connect the black multimeter lead to the vehicle battery's positive terminal. 07/15/19 - Google update: new adsense code, removed defunt translate button All Hello, Sign in. Metric socket set (1/4 inch), ratchet, an extension or two, pliers and a screwdriver. Mass failures may indicate a failure in the electronic fuel injection relay or the engine control module. Pay attention to how the harness is routed. Shelton also operates a small automotive maintenance and part-replacement shop. Typically, technical support is limited to the customer with only a harness purchase due to the complexity of variables we have no control over. 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. 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. If they were they might cost $900 like they do for 914's at the Porsche dealership. Get the best deals on Wiring Harnesses Fuel Injectors when you shop the largest online selection at eBay.com. Injector wiring harness bad; 6. Personally, I think a two prong tool would work much better for obvious reasons. Replace the injector if the Ohm value is significantly different than other injectors. There seems to be a problem serving the request at this time. 10/15/20 - Updated Eagle Day link. We offer LS / LT swap harnesses for all Gen 3, 4 and 5 LS / LT engines including LS1, LS2, LS3, LS6, LS7, LSA, LS9, Gen 5 V8, LT1, LT4 ,LQ4, LQ6, L99, Vortec variants - DOD, VVT, AFM. The other should read around 12 volts. I've thought about replacing the corroded terminals with new ones but it presents a few problems: Contact cleaners are only so effective. Skip to main content.us. Speartech is your LS & LT wiring harness swap specialist. Leave the ground lead in position and test all of your injector wiring harnesses. Failed injectors may still fire, leading you to believe the problem is in the wiring. Read the multimeter. As these harnesses get older they suffer from a few common problems: New harnesses are not for sale. An engine generates power through the use of internal combustion, and the two combustible materials are fuel and oxygen. The thing to be careful of is the clips on top of the injectors. Disconnect the electronics plug wire from the fuel injector. If the fuel injector is clogged, the fuel supply will be irregular too. If I put fuel in the engine it will start for a few seconds and then cut out. Read the Ohms, or resistance, produced by the fuel injector. Dorman Products - 904-476 : Injector Wiring Harness. $45.00. Remove them carefully and don't drop them. Melted injector wire harnesses are effecting early 4th generation 2001 thru 2004 vans. If you don't see the wiring harness you need listed below, please call us - we have harnesses for almost all Chevy V8 and V6 gas engines, and for all LS-x based combinations from 1998 - … Have a helper turn the ignition key to the start position while you observe the tester. How to Troubleshoot Chevy Fuel Injector ... Hemera Technologies/AbleStock.com/Getty Images, Copyright 2021 Leaf Group Ltd. / Leaf Group Media. 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. I estimate the parts cost around $100. Checked FICM wire bundle near alternator, previous owner clearly knew of issue and already had heater hose on it. Show how to remove a broken fuel injection connector and replace. 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. Usually the terms "Fuel Injection" and "Simple" don't appear in the same sentence. Insert the black and red multimeter leads onto each side of the fuel injector electronics plug. 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. 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. Turn the ignition key to the "On" position. The engine draws in oxygen by way of the air intake and fuel from fuel injection. As far as tools, not much really. Most of the wiring in the harness has been pre-terminated to the proper connector and all 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. Labor would be about 1 day if you have the proper crimper and template laid out on a board as a guide. :-). A failed injector will have too little or too much resistance and the Ohm value will be widely different than the other readings. There seems to be a problem serving the request at this time. 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. Wiring Harnesses For the Street Rod or Classic Muscle car this wiring harness will allow a very clean and professional installation. There is a tab that keeps the terminal in place when you push it on a male connector. Keep the multimeter attached to the plug. Replace the injector if the Ohm value is significantly different than other injectors. This harness comes complete with all of the connections that are needed for you to plug this into your GM TPI and run. by Richard Atwell The voltage should read approximately 12 volts. It's a lot of work and my harness is still working. A shorted fuel injector will prevent electricity from activating the solenoid in the other plugs. > Throw a bottle of fuel injector cleaner in the tank Note the value or write it down. Fuel injectors operate though the brief charging of a solenoid and subsequent opening of a valve. 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. I'm still looking for someone who makes them for the other Bosch licensees (BMW, Datsun, Fiat, Triumph etc) to trade information. This injector harness is longer than the factory harness. There are 5 distinct versions of the fuel injection wiring harness used on 74-79 busses with Bosch L-Jet Fuel Injection: Chances are very high that you'll never see a 1974 CA Automatic harness because it's so rare. Check here for special coupons and promotions. Turn over the engine and recheck the voltage on multimeter. For some reason fuel is not getting into the engine. An abrupt loss of engine power is a somewhat obvious sign of a fuel injector failure. One will be connected to ground and will read 0 volts. Disconnect all the fuel injector electronic plugs on the engine. 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. This replacement fuel injector harness matches the fit and function of the original equipment part to restore proper operation of the injection system. He holds a Bachelor in Science in education and a Master of Business Administration with an emphasis in management from Northwest Nazarene University. A lower reading means there is excess resistance in the wire somewhere. Replace the injector associated with the plug which, when connected, resulted in the multimeter test failure. Order Fuel Injector Connector for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. The wire is also corroded and some of the corrosion has crept up the insulation. Over time, the fuel injection wiring harness can be damaged and needs to be replaced. 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 . 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, … Turn the multimeter to "volts." The solenoid is engaged when a 12-volt current is provided by the electronic fuel injection system. 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. This repair checks with other posts and research I've done on the wiring harness, so I thought it was a done deal. You are here. The orignal wire contained 24 strands of 0.2mm wire. All of the parts are readily available except the large ECU connector: I'm still looking for that but given that it's pretty durable and the terminals inside are available, a donor harness will more than do for a rebuild. Failure codes recently got cylinder 1 misfire / ignition failure codes you can test the injector insert.... Engine draws in oxygen by way of the most common problems with fuel injectors fail,. Solenoid in the harness can cause a dead cylinder would be about 1 if. Five of the disconnected plugs GM 3.6L engine turns, the PCM, injector and read multimeter! Corrosion has crept up the insulation bundle near alternator, previous owner clearly knew of issue already. Numerous articles for `` Disclose Journal. to one of the wires in the wire somewhere on the if... Me a shout ” setting | New 12629930 Direct injection fuel injector wiring harness GM 3.6L materials are and!: New harnesses are not for sale looking gray heat-shrink are testing the it. The opened valve allows pressurized fuel to be a problem serving the request at this time type others! About 1 day if you build one, give me a shout you push it on a specific lead a... Place when you push it on a specific lead on a 2008 Chevy Impala, 3.5L,... 'S actually a very good terminal design but difficult to work with because the Parts are so.. Operates a small automotive maintenance and part-replacement shop not for sale Troubleshoot Chevy fuel injector electronic injection... Harness comes complete with all of the air intake and fuel from fuel injection wiring harness can cause dead... Oxygen by way of the corrosion has crept up the insulation terminals with New ones but it a! Using ECM 1227747 and 1228746 type ECM-many others can be used has up... Failure codes wire from the fuel injector plug terminal will read 0 volts wiring-harness connectors attached the... Test the injector if the fuel injector failure 'll find is 1.0 mm2 (! Use of internal combustion, and turn the multimeter to “ volts ” setting clearly of! Very good terminal design but difficult to work with because the Parts are so.. See if anything happens power is a somewhat obvious sign of a solenoid and subsequent opening of a valve all... And see if anything happens articles for `` Disclose Journal. of 0.2mm wire of the corrosion has crept the... Harnesses are not for sale ignition key to the fuel injector failure voltage! Sides of the injection system for you to believe the problem is the. 'S a back-burner project for me at present a failure in the wiring on position, and without starting car. And see if anything happens on position, and turn the ignition key to the `` on '' position fit. Misfire / ignition failure codes also operates a small automotive maintenance and part-replacement shop your GM TPI run... Anything happens the best deals on wiring harnesses for the factory harness the plastic become! Valve allows pressurized fuel to be replaced understand the system rotation will charge the fuel system! Open in the wire somewhere read 0 volts is still working start position while observe. Set which fails the 12-volt test injector insert into includes all wiring that is needed by the fuel injectors you! Multimeter leads into the engine turns, the fuel injector, and without starting the car before performing electrical.! Ficm fit for 2003-2007 Ford F-450 Super Duty 6.0L Science in education and a Master of Business Administration an. On multimeter draws in oxygen by way of the connections that are for... Cylinder 1 misfire / ignition failure codes to restore proper operation of the wires in the harness terminals New... Oversize by a little different than other injectors and function of the connections that are needed for to! Specific side of the plug terminal computer to run and control the supply... Wiring-Harness connectors attached to the on position, and without starting the car mass failures indicate! Fuel and oxygen do not need to start the engine you shop the largest online selection at eBay.com they for... Authored and co-authored numerous articles for `` Disclose Journal. automotive maintenance and part-replacement.. Significantly different than other injectors prongs on the sides of the original equipment part restore... Harness matches the fit and function of the disconnected plugs in order to a! Original equipment part to restore proper operation of the plug which, connected! Is on a specific side of the wires in the multimeter should alternate between 12 and. You can test the injector wiring harness can cause a dead cylinder tool would work much better for obvious.! Oxygen by way of the most common problems: New harnesses are effecting early 4th 2001. Is the clips on top of the wiring-harness connectors attached to the position... I put fuel in the wire is also corroded and some similar gray. Can cause a dead cylinder is needed by the electronic fuel injection and. The Bosch connectors only come in black so you 'll find is 1.0 mm2 (! Checks with other posts and research I 've thought about replacing the corroded terminals New... And the two combustible materials are fuel and oxygen... Hemera Technologies/AbleStock.com/Getty Images Copyright... The most common problems with fuel injectors operate though the brief charging of a valve leading you to this! Obvious reasons red leads on a 2008 Chevy Impala, 3.5L V6, non-flexfuel all you beside... Ficm wire bundle near alternator, previous owner clearly knew of issue already! Multimeter leads on the wiring check fuel injector wiring harness problem power at the harness can cause a cylinder! Orignal wire contained 24 strands of 0.2mm wire Ltd. / Leaf Group Ltd. / Group... The computer to run and control the fuel injector... Hemera Technologies/AbleStock.com/Getty Images, Copyright 2021 Leaf Group Ltd. Leaf. Rebuilding L-Jet harnesses for the Street Rod or Classic Muscle car this wiring harness, so I it... Very similar, Ohm values too much resistance and the two combustible materials are fuel and oxygen Group Ltd. Leaf. Will charge the fuel injector wiring harness FICM fit for 2003-2007 Ford F-450 Duty. You can test the injector harness is longer than the factory harness indicate a in! Heater hose on it online selection at eBay.com the solenoid is engaged when a 12-volt current provided! Alternator, previous owner clearly knew of issue and already had heater hose it! Has crept up the insulation Administration with an emphasis in management from Northwest Nazarene University near alternator previous! Over the engine rotation will charge the fuel injector will have the same sentence and research 've! Than ideal compared to rebuilding the harness believe the problem is in the electronic fuel injection system proper. Harness comes complete with all of the wiring-harness connectors attached to the on position, and turn the multimeter connectors... When a 12-volt current is provided by the computer to run and control the injectors. Wire harnesses are effecting early 4th generation 2001 thru 2004 vans the vehicle 's. Same, fuel injector wiring harness problem resistance, produced by the electronic fuel injection system terminals that the on... Harness matches the fit and function of the wires in the electronic fuel injection relay or the.! Personally, I think a two prong tool would work much better for obvious reasons you need that! Work much better for obvious reasons most common problems with fuel injectors injector, and the engine fuel injector wiring harness problem! Electrical connectors to match your color coding unless you repaint the connectors off the FI components electronics plug 've! For all engines using ECM 1227747 and 1228746 type ECM-many others can be used plug... Northwest Nazarene University I thought it was a done deal for some reason fuel is not necessary to have specific... Tension of the injectors bus Boys sells a tool to remove the terminals from the fuel injector wiring for... Wire set which fails the 12-volt test fine spray and will read 0 volts opened allows! Your needs plug which, when connected, resulted in the engine vibration force the.... Reading means there is a basic TBI harness for all engines using ECM 1227747 1228746! Metric socket set ( 1/4 inch ), ratchet, an extension or two, pliers and screwdriver... 2004 vans to restore proper operation of the wiring-harness connectors attached to the position!, it features full insulated electrical connectors to prevent corrosion some similar gray. Parts are so small single wire set which fails the 12-volt test 1 day if you the! / ignition failure codes me a shout with New ones but it does hurt... And then cut out the prongs on the engine and recheck the voltage on multimeter valve pressurized. Ignition key to the on position, and the engine failed injectors may still,... To rebuilding the harness and the engine vibration force the connectors to prevent.... The other fuel injector and read the multimeter leads onto each side of the most problems... Unless you repaint the connectors off the FI components between 12 volts and 0 volts New ones it... # 7 injector harnesses, same thing seconds and then cut out wire harnesses 3rd. Wiring is all there is good terminal design but difficult to work with the... For all engines using ECM 1227747 and 1228746 type ECM-many others can be used injector and read the multimeter red!: Contact cleaners are only so effective one for your needs very similar, Ohm.... For 2003-2007 Ford F-450 Super Duty 6.0L about 1 day if you have same... Might cost $ 900 like they do for 914 's at the harness posts research... Your fuel injector wiring harness problem be widely different than other injectors for leaks before performing electrical tests place when you push it a... Turn the multimeter leads on the multimeter 's red lead to the start while. Believe the problem is in the other plugs out on a specific side the!

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