Question about 1999 Isuzu Trooper

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Check engine light flashes on acceleration - 1999 Isuzu Trooper

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Hello
When the service engine soon light a yellow light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Posted on Dec 09, 2012

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When the CEL is flashing it is indicating potential damage to the catalyst. This is most likely due to a misfire situation. Retrieve codes to get a general idea on what is going. If it's a single cylinder misfire you can swap around wires or plugs to see if you get the misfire to move to a different cylinder.

Posted on Dec 10, 2012

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