i have a 2003 chevy suburban 5.3 liter..bogged it down got the converters hot.. since then been runnin rough..found i had blowed head gasket..fixed that and numerous other electrical components..

Asked by Mar 04, 2014 at 08:15 PM about the 2003 Chevrolet Tahoe LS

Question type: Maintenance & Repair

problem now is diagnostic shows m.a.f. problem..replaced that twice..replaced plug wires twice..and its still fouling out my plugs..no power..and bogs out when u give it gas??

3 Answers


A MAF Code doesn't always mean that the MAF is bad. If your getting fouling, and you replaced the plugs, check out your coils and for vacuum leaks. Scan for codes again and post the 4 digit code back here so we can help further.


The last MAF code for a GM question I seen on here was plugged cats. The low air flow vs. engine load sets the MAF code. It's worth checking.


I was thinking the cats were bad. If you "got them hot" it may of messed them up creating a major restriction in the exhaust flow. It's almost like the old tail of someone sticking a potato in the exhaust pipe.

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