Question about 1989 Isuzu Trooper
The engine revs from 1000 rpm to 2200 rpms every time you mash the clutch.
These Isuzu engines will automatically raise the idle RPM when they begin to run hot... this is done to increase the cooling fan speed for more air flow thru the radiator..... is your temperature gauge showing above normal ...? if so, check your cooling system... I put a 160 degree thermostat in mine. (was 180)
Posted on Apr 23, 2009
Check EGER valve and vacume hoses..
Posted on Feb 16, 2009
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Posted on Jan 02, 2017
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