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ENGINE STALLS on 1992 Lexus SC300

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LOST OF POWER. BACKFIRES CAN IT BE THE MAF
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Loss of power, decrease in fuel economy lag in acceleration can all be sings of a bad air flow meter/map/of maf .
Back firing is caused due to a lean mixture, check for vacuum leaks, torn air induction boot ect.....
All above symptoms could be caused by low fuel pressure/fuel delivery volume, or incorrect cam timing. Proper diagnostic tests should be carried out before condemning the MAF.
I had a similar problem after changing spark plugs and found i had a torn induction boot. replaced it but im still having problems. any suggestions?