Question about 2003 Chevrolet Suburban 1500

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Engine cranks don't start it is firing filters are good i was told it was the airflow sensor

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  • Larry Spears
    Larry Spears Aug 20, 2008

    no fuel to the throttle body injector. Changed fuel filter last week.



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I have had the same issue. Not enough fuel pressure from the pump. Replaced pump and all is good. Just to be sure you can install a gauge to verify pressure

Posted on Aug 23, 2008


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The engine is wants to start but it backfires with flame.we have already changed the airflow secsor, angle crank censor and camp shaft sensor. It started 3 times but it again is backfiring.what to do.

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Lets start at the beginning.
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You really need to start with basic troubleshooting. Is there spark to the spark plugs? Do you hear the fuel pump prime during initial Key On & during Engine Cranking?

Why did you change the MAF (mass airflow sensor)?

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