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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1 Answer

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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'92 chevy lumina van running rough after fuel pump replacement


mass airflow sensors don't have a vacuum line, you sure you don't mean the EGR valve? if it was the regulator i doubt it would run good or make much of a difference unplugging the vacuum line, take a reading of the fuel pressure, if it starts to drop while the van is running you have a bad regulator.

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Engine cut out while driving, won't start.


Lets start at the beginning.
If you have a V6 engine you have two cam sensors. And the problem could be the cam sensor(s) is not in sync with the crank sensor due to a problem with the sensor or the timing belt.
Code 340 is for bank one sensor one. You could have as many as 4 sensors depending on which engine you have.
The mass airflow meter code could keep the engine from starting.
The cruise control problem could be related to the cam-crank sensor issue or something else.
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Engine cranks but will not start. i have new fuel filter installed new plugs installed .i have fuel pressure at fuel rail ,i have spark at plugs and the injectors all read 11 to 14 ohms resistance per shop...


If you've got spark and fuel, it should fire up. Crank the engine for about 20 to 30 seconds then immediately pull one spark plug. if your getting fuel, it should be wet with gasoline. No wet,no gas. But then again, the code says rich mixture. Doesn't add up. Check all the connections at the mass airflow sensor and the crankshaft and camshaft sensors.

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check wiring, fuses and relay for fuel pump and check fuel filter---also recheck to crank sensor wiring ,connections and sensor new doesnt mean not defective

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Expedition won't start or even act like it wants to. Just cranks and cranks. I feel it might be fuel pump.


easy way to test for it being fuel.open air filter box spray alittle starter fluid.then try starting if it runs or fires over its fuel related.if not then its sensor or fuse related.hope that helps.make sure the fluid is ma safe.meaning mass airflow sensor safe.as some starter fluids will mess them up.

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FIRING ORDER & CAR QUITS WHEN YOU PLUG IN MASSIVE AIR FLOW SENSOR


Hello,

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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