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Crank no start?

Tiny
RUDEDOG68
  • MEMBER
  • 1987 CHEVROLET S-10
  • 2.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 160,000 MILES
Have replaced fuel pump, relay and PCM. I have spark but fuel pump does not cycle when key is turned on
Thursday, February 5th, 2015 AT 4:51 PM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pump relay our site covers it under how to repair. If relay good then check for short in wiring.
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Thursday, February 5th, 2015 AT 5:03 PM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Do you have power at the relay?
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Thursday, February 5th, 2015 AT 5:11 PM
Tiny
1%WHITEGIRL
  • MEMBER
  • 4 POSTS
Yes
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Thursday, February 23rd, 2023 AT 5:53 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Okay, I would unplug the MAP sensor and crank the engine over to see if the fuel pump starts working. also, can you check the engine for spark, here is a video to help:

https://youtu.be/baq_aEWNQ0Y

Here is the location of the sensor please let me know.

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Saturday, February 25th, 2023 AT 1:10 PM

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