No spark and fuel dumping

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the crankshaft position sensor
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Thursday, January 10th, 2019 AT 6:49 PM (Merged)
Tiny
DON-PAM
  • MEMBER
  • 1 POST
  • 1990 CHEVROLET CAVALIER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 220,000 MILES
Has no spark. Changed the ignition control module with a used one. Checked and bypassed the crank position switch - still no spark. Originally it would run for about 5 minutes then shut down for a bit. Now no spark at all.
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Thursday, January 10th, 2019 AT 6:49 PM (Merged)
Tiny
THETOOLMAN
  • MEMBER
  • 123 POSTS
Based on the info you have provided I would check the ignition module. I am not sure what you mean by "Checked and bypassed the crank position switch"
The crank shaft position sensor should not be jumped out. If that is what you mean that should be your first step to hook everything back up and start fresh. The fact that it was running a little about 5 min. And now you have a no start condition. Sounds
to me like you replaced a bad part with a bad part. If possible you should always replace an electronic device with a new one.
I understand that is not always an option. Please make sure your CSPS is hooked up and replace the ignition module. If you are doing the work yourself and labor cost is not an issue you could put the old one back on just to verify my suspicion that the used one is bad. If it starts and runs for about 5 min. You will know. Good luck.
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Thursday, January 10th, 2019 AT 6:49 PM (Merged)
Tiny
BATMAN_USA_WI
  • MEMBER
  • 1 POST
  • 1990 CHEVROLET CAVALIER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
I have a 90 chev cavalier z24 3.1 v6. It runs fine for like 10 to 15 minutes then just shuts off like I turned it off then wont start again til like 20min later I think its something heating up and then cooling down but I dont know what it is. When it quits I turn it over and ther is no spark with any plug. I change fuel filter, coils, igination module, wires, plugs. Do you think it would be the crank sensor? But would the car run if it was that?
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Thursday, January 10th, 2019 AT 6:49 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
What you need is a crank sensor
have it replaced and that should solve your problem
good luck
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Thursday, January 10th, 2019 AT 6:49 PM (Merged)

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