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1996 Buick LeSabre

Question: Diagnostic analyzer showed a code of P0300= random misfire...

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zventura, West Covina, CA, February 01, 2012, 17:07
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when idling, it appears that the engine wants to stall...or there's a hiccup when idling...what are the possible cause of this problem...

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  • Answer #1

    dandd February 02, 2012, 13:42
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    Too many to list here, so first and foremost, check for any vacuum leaks, check the fuel trim with a scanner, LTFT should not be above 8% at idle. Check the plugs, wires, filters etc. In other words, check and inspect basics and go from there. You will NEVER go too wrong by checking the basics first and foremost.

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    zventura, February 02, 2012, 18:09
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    Thank you so much for your response...I was able to check the vacuum and it solved the problem...I truly appreciate your help...God Bless...

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