Question about 1992 Isuzu Trooper

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How i do when the check engine appear in dashboard

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The warning light is telling you the computer found something that will affect the performance and fuel mileage. You would need to get the computer scanned for trouble codes to proceed.

Posted on Dec 09, 2012


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Tempeture hand on gauge rises and falls as you accelerate and slow down. Also rises and falls when you turn on the internal blower in the car. The engine does not appear to be overheating.

The problem you describe is likely being caused by the dashboard earth (ground) reference moving as the 12v power system current draw changes.

Ensure battery terminal post connections are in good order, clean and firmly connected,
Ensure the all chassis, alternator, engine and dashboard ground connections are intact and in good order.
Ensure all dashboard loom connections are properly connected,
Check alternator output voltage (battery terminal voltage) is approx 14.5 volts with engine running, while loaded with headlights or blower motor running.

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