91 Buick Regal Problems

[matthew89]

i have a 91 buick regal GS that has a few problems that i cant figure out. first the car has a intermittint no start where it will run till it heats up then die setting no codes. starts and runs if you keep it above 3,000 rpms but wont idle. once it cools down it starts over again. some times i will get a quad driver code. sometimes after trying to start it dies and i will have the canister purge solenoid clicking like the pcm is commanding it on 100%. I have a red "check gauges" light that stays on all the time in the dash. and the right side cooling fan never comes on. So i checked all relays for fuel and fans. ive checked iac, tps, cts(coolant temp), canister purge sol., and ignition module circuits for high resistance and shorts to ground and short to powers. but found nothing wrong. i have a had time believing that my cam or crank sensors are bad, or my cat for that matter. so right now im starting to think that all the wiring i have running next to the engine is getting hot and causing high resistance, but everything checked out good cold. I dnt know where to go from here tho other then doing all the work over again when it dies. has anyone heard of the problem ive got? any reply is appreshated

[GTP Dad]

Welcome to AF!!

This truly sounds like a crank position sensor. The key is the fact that when it stalls it is warm and it restarts again. The CPS will not set a code until it completely fails. Replace it and the problem should go away.

[matthew89]

well the reason i had a hard time believing that the crank sensor was bad was because when the ecm loses crank sensor it kills the fire. and sence i was able to start it and run with my foot on the gas at 3000 rpms and it would die as soon as you let off the pedal. But alright...im gunna replace the crankshaft sensor tomorrow and see what happens, i just dont want to start throwing parts at it...thanks for the rely! ill let chu know what happens.

[matthew89]

alright so after i replaced the sensor making sure it was aligined right i started the car it ran a little and dies i checked the codes and i got a code 42 for the crankshaft sensor open ground/open. it this something i caused in the sensor or is the probly in the wiring?

[matthew89]

mybad i meant code 42 for the EST open/grounded i think

[GTP Dad]

Check the wiring. It is possible that one of the wires has been damaged or the insulation is worn and is grounding out on the block.

[matthew89]

yea i did all the checks that i knew how to do and i still have this problem im so frustrated that im not gunna waste any more of my time on it. sorry. i think my mom is gunna take it to a shop and hopfully they know more then i do. thanks for all the help tho. later

[GTP Dad]

Please post the issue once the problem has been remedied.

[matthew89]

I have been working with the mechanic in the shop and we've ruled out a number of things. And still havent found the problem. ill remember to post the issue on here as soon as we find out.