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1993 Chevy S-10 Surging and loping

Tiny
TOM SPIVAK
  • MEMBER
  • 1993 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 248,000 MILES
I have replaced the exhaust, O2 sensor, map sensor, temp to controller sensor, cap, rotor, plugs, wires, and still it starts good and runs well with power for about 3 minutes until warm then misses at idle and at highway speed lopes and acts like it is out of time but through out the speed range.
Loss of power also.
This is only after it is warm.
Any new ideas?
Oh yeh, it is hard to time.
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Friday, October 30th, 2009 AT 4:06 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,876 POSTS
Has the check engine light come on? Have you checked fuel pump pressure or for vacuum leaks?
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Thursday, November 12th, 2009 AT 10:33 AM
Tiny
TOM SPIVAK
  • MEMBER
  • 2 POSTS
No check engine light on, have extensively checked for vacuum leaks, have not checked fuel pressure.
This is TBI, how do I check pressure?
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Thursday, November 12th, 2009 AT 6:30 PM

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