Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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Have you tested to see if you have spark from one or more cylinders?
Has fuel pressure been tested at all?
Let me know so we can continue,thanks Pete.
Are the spark plugs wet with fuel?
Is the anti theft/security light on steady or flashing on the dash after you try and start it and it starts and dies or does not start and you let go of the key without turning the key off any?
Have you checked for fault codes and is there a cam sensor code set or any other code set?
Did the plugs become wet immediately after they were replaced?
Have you tried to remove them and clean and dry them and unplug the coil and crank over the engine with the plugs out to blow out any fuel then install the dry plugs and plug in the coil and see if it starts then at all?
O.k.,lets check this first and see what is occuring.
Unplug the main connector behind the throttle body that feeds the fuel injectors.I believe there are pink wires and these should have battery voltage (12 volts) with the key on.Then test any of the other wires other then the pink wires and see if any of them show a ground signal at all key on or off and let me know.
Test between the pink wire and all other wires that are not pink with the meter set on dc volts and see if you read around 11.9 volts and let me know.
O.k.,your other wires that are not pink are the ground pulse wires from the engine computer.These should not have a ground signal.IF they do like they are showing here this indicates either the engine computer is at fault needing replaced as it is shorted internally or the wiring from the engine computer is shorted at some point in the harness and needs traced to locate and repair the short to correct this here.The ground signal you are seeing here should only flash off and on when the engine is cranked over and when started and since it is solid ground this indicates the wiring at fault or the engine computer.
If it needs a computer it will need programmed by a dealer and usually an hours charge to have this done.The computer cost varies anywhere from $200 to $600 depending on where you purchase it.
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