i have a 91 isuzu and lately my truck has been reveing from 1ooorpm to 2000rpm only when i put the clutch in if i give the gas a small tap it will idle out to 1000 can anybody tell me why and what i have to change this truck has a 2.6 engine when i first bought this truck it worked perfect then i was taking my wife to work and it would not go up a hill unless i shiftted down a gear then that is when i noticed the idle going up and down i tapped the throttle and it idled out

Last edited by lawrence42; 03/16/09 01:31 PM.