I have a 1993 cutlas supreme, 3.1. I think It has jumped time. It has about 150.00 miles. It ran good one day, then i got home and cut it off and it would not crank. What do you think I should check. If it is the timing, could you tell me how to check it. Thanks gary
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Re: will not crank
Id be suprised if its the timing as it was fine when you turned vehicle off and that isnt enough to make your timing jump.Have you checked the battery is ok?If battery ok then are the main cables(battery)tight on the battery terminal.Also check that the battery cables are tightly bolted to the engine and starter motor.Make sure the starter motor solenoid wire hasnt fallen off and has twelve volts power when cranking.Does the dash light up when you turn ignition on?Could also be time to replace starter if other tests are ok.Let me know how you go and good luck.
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You will need to change the crank position sensor first and see if it corrects the problem. It is located behind the engine near the firewall. It's a bit tricky to get to it, you would need to rotate the engine forward then look under the exhaust manifold and under the cylinder closest to the drivers side. Use a 10 mm deep socket to loosen bolt. After replacement and it is still stalling then you will need to replace the ECM (vehicle computer). If it turns out to be the computer, go to your local junkyard to get an inexpensive replacement Click on the link below to view the CPS, it is around $22
If the throttle plate is closing completely, then this seems to be temperature dependent. Probably the intake manifold gasket. These GM engines were extremely prone to that. When the engine warms up, metal expands, and seals the leak. A good mechanic can check out the usual other culprits: cracked vacuum hoses, bad pcv or egr valve, idle air control motor, etc. Then, maybe a smoke test, when the engine is cold.
There was a giant class action suit on these engines for that problem, but payments ran out 2008. So, use high quality gaskets, (FelPro is excellent) the newly revised torquing procedure, and precoated bolts from GM. Don't use the GM orange coolant. It dissolves the gaskets. Good luck
Check all fuses under dash and hood. Install a good battery or jump it. Have someone try to crank it while you check for voltage to the starter solenoid. Make sure all battery connection including ground to body are clean and tight. If good, make sure there is 12volts at the stater. If good, it sounds like a new sarter. Please let me know. Is this standard or automatic?