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1986 Chevrolet S-10 Runs rough

Tiny
DANA SMALLEY
  • MEMBER
  • 1986 CHEVROLET S-10
  • 2.8L
  • V6
  • 4WD
  • MANUAL
  • 189,000 MILES
Idols rough sometimes stumbles sometimes under acceleration lopes sometimes no throttle response sometimes just sputters and pops
Monday, December 1st, 2014 AT 8:23 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,355 POSTS
Does it ever run normally? When was the last tune up? Have you checked compression, fuel pump pressure?
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Tuesday, December 2nd, 2014 AT 5:31 AM
Tiny
DANA SMALLEY
  • MEMBER
  • 4 POSTS
Yes sometimes it runs great I bought the truck out of a scrap yard and the man that brought it in said it was a good truck just needed a fuel pump and he was not pulling the bed off so I bought it and put a pump in it it had set for three years
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Tuesday, December 2nd, 2014 AT 11:42 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,355 POSTS
Have you checked fuel pump pressure? Was the fuel filter replaced? Have you checked for vacuum leaks? Have you checked it for trouble codes?
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Tuesday, December 2nd, 2014 AT 7:05 PM
Tiny
DANA SMALLEY
  • MEMBER
  • 4 POSTS
If I unplug the map sensor it runs great
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Wednesday, December 3rd, 2014 AT 7:33 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,355 POSTS
Have you replaced that sensor?
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Thursday, December 4th, 2014 AT 5:25 AM
Tiny
DANA SMALLEY
  • MEMBER
  • 4 POSTS
Just had discovered that it run good unplugged I unplugged the map senser and drove it to the store and run great
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Thursday, December 4th, 2014 AT 6:42 AM

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