My Truck Turns Over, Engine Wont Start, Although It Starts Sometimes Electrical Problem
Posted in Crank, Oil and Piston | Asked on Sep 5, 2010I have a 1990 chevy cheyenne pickup, i got in to go to the store and it started fine, when i got back in to start it it was doing the same thing as yesterday my buddy and i cleaned off the knock sensor and it worked fine for a day, now its just cranking and not starting, it has enough gas in it and the spark plugs work whats going on?
There are 2 Answers for "My Truck Turns Over, Engine Wont Start, Although It Starts Sometimes Electrical Problem"
Sounds like you need to replace the starter.
Are you sure the motor is getting fuel. Chevys have alot of fuel pump problems. I believe your truck has 2 injectors above the throttle body under the air cleaner. When cranking the engine you should see a conical shaped fuel spray coming from both. I have also seen those injectors go bad, the wiring goes bad and melts and they short out. The fuse for the injectors is either ECM 1 or INJ 1 (10 amp). If that does not get it then go back to the ignition. The knock sensor should not prevent the engine from starting. But I did notice in the wiring diagram that the knock sensor is wired to the electronic spark control module which will prevent the engine from starting. I am assuming you are checking the spark when the engine is cranking and not starting. I would also suspect the coil. Good luck.