car is fluctuating when at idle on 1995 Isuzu Trooper

not sure when it began but when i come to a stop the rpms start fluctuate high low

by in Lakewood, WA on January 24, 2011
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1 answer 2 comments
ANSWER by , January 24, 2011
This is usually caused by a throttle position switch, vacuum leak or other idle control issue. These are a good place to start! Greg
COMMENT by , February 08, 2011
same problem on mine. just changed idle air control valve and fixed it. 50 bucks and a phillips screwdriver is all that is required.
COMMENT by , February 10, 2011
Thanks for the help. I recently scanned for error codes and found egr system failure. I am going to see about cleaning it out first (they are expensive to replace) but I am thinking that might be the cause of the rpm fluctuating. I will look into the other suggestions also especially if it is cheaper. Thanks again