Re: Mice chewed through wiring harness to fuel injector...
The corect name for the harnes would be the engine harnes, usually expensive adn hard to replace. I make repairs on problems like this all of the time. a proper repair would include replacing the damaged wires, soldering the conections adn heat shrinking the repairs to keep out moisture. this kind of work will not be cheap, if it is you are not likely to get a quality repair. hope you can rid your garage of mice.
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Fuel in the injector harness can result in a short causing this code. The only way for fuel to be there is a leaky injector. Dry off harness and monitor. Even though the injector is new, it may be defective. The next place to look is the wiring harness itself. You will have to find where the wiring for #4 injector goes into the vehicles computer and perform a resistance test from the injector harness to the computer to make sure there is no high resistance/opens. If all checks out fine, the computer may be bad. VW computer failure rates are extremely low. I would concentrate on a wiring issue.
problem vehicles just cost money regardless of how badass they are. Having said that the way to fix the problem will be to go to a dodge wreckers ( plenty of them around) and get all the wiring harnesses connected to the engine . Be smart and disconnect and connect as you go so that you do not need a wiring diagram
you mean the injector # 3 was dry ? Is that injector connector plug-in, wires ok ? do anything different ? Is harness ok ? Is plug wire ok ? you need to make sure you have power thru and to #3 , even new wires can be bad ! check for a short, continuity, and good ground. any codes stored in the ECM ?
hi engine mechanical fault cylinder 4 could be timing has moved causing moving parts to come in contact with each other
ignition fuel system have fuel pressure checked at injector
mass air flow system have it checked it will be on the air intake hose
engine controll module have it checked
hope some of this is of help
Its most likely a clogged or malfunctioning fuel injector. Unplug the injector wire harness and check contacts for corrosion. If there is corrosion clean it with some electrical contact cleaner spray, apply some dielectric grease before reattaching it. If that doesn't work you can buy some fuel injector cleaner, the aerosol type that attaches to the fuel rail, not the gas additive type.
I had exactly the same problem when I bought a ford pu last year for resale. 4 injector wiring lines were chewed through. I tried starting it before I fixed them, and it ran on the other 4... but it did foul the plugs that had chewed lines, so I changed them & that solved the problem. So if you have the right fuel pressure at the fuel rail, and your injector wiring has been done correctly, i would not buy new injectors until i put new plugs in those cylinders.