Question about 1988 Isuzu Trooper 2 Door
On first start cold this would be normal the RPM range, but it should come down within a few moments, if I read your post correctly it does come down to normal? if so check for a cold running engine or a poss defective ECT sensor, you will need a scannner to test the ECT signal, also a sticking idle speed control airbypass valve can cause this problem..
Posted on Jul 17, 2009
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Posted on Jan 02, 2017
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