It turns over but won't go. I have changed the fuel pump and some computer chip that cost me a couple of hundred bucks.
2007-10-21 12:01:35 · 3 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ GMC
I own a shop, and think this: It sounds a lot like the ignition control module is going bad, as this is how they act when they do. When it doesn't want to start, is when you must determine what component its missing in order to locate the exact cause. Is it missing fire, fuel, or have an electronic problem, or maybe even a short? It's so hard to say just what it is, and you may never find it until it decides to stop completely. There are so many things that can cause this, but the most common is the module.
Part 2:
You could replace the computer in the vehicle for about a couple hundred bucks. This particular vehicle has a common problem with the ignition control module that is underneath the rotor button in the distributor. Not knowing which engine you have, or which ignition system you have, makes it difficult to point you in any direction. A good rule to follow is: An engine must have 3 things to make it run. 1. Fire to the spark plugs. 2. Fuel to the cylinders. 3. Compression. Any problem that takes place intermitently is hard to find, and for "anyone" to tell you to check this or that, has no clue either. The "ONLY" way this can be found is for someone to determine whats taking place when it stops running....period! It could be the fuel pump getting hot, and shutting down, could be a loose wire on the computer harness where it plugs to the ECM. Bottom line is this: You will have to determine what is missing at the time it won't run, and any other suggestion is pure speculation.
Glad to help out, Good Luck!!!
2007-10-22 02:15:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
When the motor is when you have to check for what is wrong, that means being prepared to diagnose. What you need to check for first is things like codes stored in the PCM and good data. Also check for spark output at the spark plug connectors, needs to be strong and consistent. I would even check through all of the spark and coil wire connectors for corrosion or splits in the insulation as if a spark jumps to ground, you will have no spark. Be sure to check all of the connections at the dist. cap and the coil tower as this is where these used to corrode. The other thing to check is the fuel pressure at the rail at the back of the intake plenum, needs around 55 psi to go. If you don't find anything, don't replace anything. When it acts up, test everything again to find out what is not working and then diagnose this circuit to find your bad component or wiring.
2007-10-22 14:22:50 · answer #2 · answered by Deano 7 · 0⤊ 1⤋
Check for vacuum leak at fuel pressure regulater.Change the fuel filter.Could also be a defective fuel pressure regulater.
2007-10-22 00:38:56 · answer #3 · answered by (A) 7 · 0⤊ 1⤋