Labor would be about 1 day if you have the proper crimper and template laid out on a board as a guide. 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 engine draws in oxygen by way of the air intake and fuel from fuel injection. Personally, I think a two prong tool would work much better for obvious reasons. 06/17/07 - Added link for Kyle's harness repair business In order to diagnose a fuel injector problem, it helps to understand the system. This problem is caused by a poorly designed metal mount for the harness and requires a thorough inspection of the FICM harness where it passes behind the alternator. The opened valve allows pressurized fuel to be pushed through the fuel injector nozzle into a fine spray. As the engine turns, the voltage on the multimeter should alternate between 12 volts and 0 volts. Fuel injectors operate though the brief charging of a solenoid and subsequent opening of a valve. An abrupt loss of engine power is a somewhat obvious sign of a fuel injector failure. Get the best deals on Wiring Harnesses Fuel Injectors when you shop the largest online selection at eBay.com. 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. 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. Amazon.com: fuel injector harness. 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. Replace the injector if the Ohm value is significantly different than other injectors. This is a basic TBI harness for all engines using ECM 1227747 and 1228746 type ECM-many others can be used. As far as tools, not much really. 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. Have a helper turn the ignition key to the start position while you observe the tester. Because you are testing the current it is not necessary to have a specific lead on a specific side of the plug. 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. The rest of the injectors are fine. 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 plastic connectors become brittle and break. I think it has something to do with the wiring connection to the fuel injector because when the wires are in the plastic connector it won't start, but if I do a direct connection to the fuel injector … Melted injector wire harnesses are effecting early 4th generation 2001 thru 2004 vans. The terminals in the connectors oxidize as does the exposed wire and some of the wire covered by insulation Basic connections are standard but it is easy to customize one for your needs. Keep the multimeter attached to the plug. Black Smoke From Exhaust Problems. 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