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Originally Posted by rgildoss
I have this exact same problem with my 97 rodeo.
I replaced the alternator because the mechanic said it was the alternator and 400.00 dollars later……..same thing …so I called the mechanic back and he again said it was a bad alternator and replaced it again ( for free this time ) and guess what ….same f**k problem again .. I am at a lost …don’t know were to go or do now … the funny thing about this is that when I accelerate the voltage meter drops from 14 volts to 12 volts and the heater fan speeds down slow, when I release the acceleration, the voltage meter goes to 14 ( normal ) and the fan goes back to normal speed.
Here is the catch….when I turn my head lights on????? No problems everything works normal….. no voltage drops, no fan problems , nothing !!!!
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I got the same problem on my 96 Trooper 3.2 V6, only it doesn't matter what I turn on or off. The problem started when a shop welded on the exhaust system. The problem depens on the temperature. if it is hotter it happens more.
Question, if you add throttle really slowly, does the problem still exist? With mine it doesn't do it if I advance the throttle slowly.
I had that checked out at an Isuzu dealer, but they could not get any useful info to me. I installed a new alternator, did not help, cleaned a bunch of ground wiring contacts in the engine compartment, did not help.
Anyway, if I will find anyting that helps, I will let you know.
Andy