Fluctuating RPM while driving - '95 4.3 CPI
Thread Starter
Joined: Nov 2005
Posts: 34
Fluctuating RPM while driving - '95 4.3 CPI
The vehicle is a '95 S10 Blazer, 4WD - 4.3 CPI
I recently installed a new fuel pump and filter, EGR, plugs and O sensor. At speed 45-55 mph the RPM's fluctuate +/- 3-400 RPM causing a slight surging - the ride is not smooth.
Any ideas or direction I should go in?
Many thanks in advance of your responses.
I recently installed a new fuel pump and filter, EGR, plugs and O sensor. At speed 45-55 mph the RPM's fluctuate +/- 3-400 RPM causing a slight surging - the ride is not smooth.
Any ideas or direction I should go in?
Many thanks in advance of your responses.
BF Veteran
Joined: May 2005
Posts: 3,890
From: Central Illinois
RE: Fluctuating RPM while driving - '95 4.3 CPI
Sounds like your torque converter is locking and unlocking. Why?
Take it to AutoZone and get it scanned for codes.
Also, are you driving with your foot on the brake pedal? DONT
Take it to AutoZone and get it scanned for codes.
Also, are you driving with your foot on the brake pedal? DONT
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