Crankshaft sensor

Tiny
ROBERT85387
  • MEMBER
  • 1998 CHEVROLET CHEYENNE
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 220,000,000 MILES
Replaced sensor truck turns over will not start
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Thursday, February 11th, 2016 AT 12:30 PM

19 Replies

Tiny
JOHNNYT73
  • EXPERT
Have you checked to see if you have spark and/or fuel?
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Thursday, February 11th, 2016 AT 12:37 PM
Tiny
ROBERT85387
  • MEMBER
No
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Thursday, February 11th, 2016 AT 12:49 PM
Tiny
JOHNNYT73
  • EXPERT
Ok, you need to check to find out what is you are missing.
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Thursday, February 11th, 2016 AT 12:50 PM
Tiny
ROBERT85387
  • MEMBER
All fuses look good
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Thursday, February 11th, 2016 AT 12:50 PM
Tiny
JOHNNYT73
  • EXPERT
Ok, you need to check to see if you have spark to the plugs during ignition and that you have fuel pressure when you turn the key on.
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Thursday, February 11th, 2016 AT 12:51 PM
Tiny
ROBERT85387
  • MEMBER
No spark
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Thursday, February 11th, 2016 AT 1:35 PM
Tiny
JOHNNYT73
  • EXPERT
Look under the distributor cap and look at the condition of the rotor and terminals in the cap. Also your ignition module in the distributor could be bad. You do have fuel pressure correct?
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Thursday, February 11th, 2016 AT 1:42 PM
Tiny
ROBERT85387
  • MEMBER
Correct truck ran fine until I replaced crankshaft sensor
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Thursday, February 11th, 2016 AT 1:50 PM
Tiny
JOHNNYT73
  • EXPERT
If it was running fine, why did you replace the sensor?
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Thursday, February 11th, 2016 AT 1:53 PM
Tiny
ROBERT85387
  • MEMBER
Pulled out to get at oil leak and found the rubber ring damaged put a new one in did not start replaced new one thought it was bad with another new one engine codes are on Po 336 and Po 336
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Thursday, February 11th, 2016 AT 2:06 PM
Tiny
JOHNNYT73
  • EXPERT
Is the cover the sensor attaches to plastic?
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Thursday, February 11th, 2016 AT 2:08 PM
Tiny
JOHNNYT73
  • EXPERT
Have you tried putting the old sensor back on?
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Thursday, February 11th, 2016 AT 2:08 PM
Tiny
ROBERT85387
  • MEMBER
Tried putting old one back on truck cranes over will not fire no spark to plugs I belive it attaches to metal
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Thursday, February 11th, 2016 AT 2:24 PM
Tiny
JOHNNYT73
  • EXPERT
Ok, I know GM had an issue with some crank sensors back in the day that attached to plastic covers. When installing a new one you sometimes had to use a shim because the sensor would contact the ring on the crank.
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Thursday, February 11th, 2016 AT 2:27 PM
Tiny
ROBERT85387
  • MEMBER
That is they said to replace the on truck it was hitting the crank because of a scratch in it I replaced the new twice truck cranes over fine just not firing
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Thursday, February 11th, 2016 AT 2:34 PM
Tiny
JOHNNYT73
  • EXPERT
This is interesting. Have you checked to be sure they are selling you the correct part?
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Thursday, February 11th, 2016 AT 2:45 PM
Tiny
ROBERT85387
  • MEMBER
It looks different it a new design so you do not need shims but part number say it for a 5.7
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Thursday, February 11th, 2016 AT 2:59 PM
Tiny
JOHNNYT73
  • EXPERT
Check your terminals to be sure they are in place and secure
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Thursday, February 11th, 2016 AT 3:04 PM
Tiny
ROBERT85387
  • MEMBER
Thanks will do that first thing in morning have to go thanks for your help
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Thursday, February 11th, 2016 AT 3:09 PM

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