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1993 Chevy Suburban Running Rough

Tiny
CWARRENBURGESS
  • MEMBER
  • 1993 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 161,000 MILES
My truck has recently began to run very rough and choppy when cruising between 1200 and 2500 RPM, but runs smooth as ever when accelerating or in a lower gear and over 2500 RPM.

It has a new fuel pump, filter, wires, plugs, battery, alternator and belt. It seems very strange that it is so sudden and jerky, almost as if it is electrical. I have even tried a new MAP sensor to no avail. What could be wrong?
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Wednesday, April 28th, 2010 AT 12:49 PM

1 Reply

Tiny
CONSAKA
  • MEMBER
  • 31 POSTS
How old is the O2 Sensor?
O2 Sensors start to go "bad" the minute you start using them. They definitely have a limited lifespan. Id start there and then go back to the electrical possibilities. Id start by checking the wear on the distributor and then the electrical components inside the distributor.
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Wednesday, April 28th, 2010 AT 1:15 PM

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