I have a 1999 Isuzu Trooper and the idle keeps getting higher 1500 to 2000 rpm. The check engine light does not come on.If I pull the fuse to the computer it will reset and idle at 750 rpm for about a day, then creep back up over the next several days. Any ideas on what might cause this
high idle on trooper
Oct 02, 2003
3 Replies
It is difficult to guess. I would first check to make sure the air filter is clean and that the plastic hose from the filter box to the engine is connected securely and has no cuts in it. Extra air can cause it to run at higher RPM. My other guess would be to check the TPS. TPS is simple to check all you need is an ohmmeter. If you have a shop manual look it up in there.
They hang on the end of the throttle plate shaft & (usually) have a 3 wire connector.
Regards, Al
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required