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2002 Pontiac Bonneville Question: I have an intermittent stalling problem, it will happen at any time.

 

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DJ11, 3.8L V6, Fort Wayne, IN, August 27, 2012, 14:22
 Rookie

Whether its idling or driving it will start chugging and then stall. I checked the fuel pressure while the car was chugging and finally stalled and the pressure stayed up the entire time. Now I'm leaning towards MAF or CKP sensor. Can I bypass the MAF sensor to determine if that is my problem or not?

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    August 27, 2012, 14:55
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     Master

    Do you have access to a scanner? Very helpful tool for this prob.

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    DJ11, August 27, 2012, 16:58
     Rookie

    I had it scanned at Advance Auto Parts and it had a code saying MAF sensor low voltage. I forgot to mention that when it stalls, I can start it back up and sometimes it will run ok and sometimes it will do the same thing.

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    pushrod, August 27, 2012, 19:26
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     Master

    Think it may be MAF.

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    DJ11, August 28, 2012, 03:23
     Rookie

    I would like to verify that's what it is by bypassing the MAF if that's possible, before I drop $140.

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    pushrod, August 28, 2012, 06:45
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     Master

    With eng. warmed up,tap on MAF with screwdriver handle (idle speed) see if
    eng. responds at all if it stumbles or even changes in response to tap
    REPLACE MAF!! Good luck.
    I don't know of a way for bypass.

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    ziptie12, August 29, 2012, 04:13
     Master

    Only way to by-pass would be if you have a friend with a model that has THE EXACT same MAF on their car and swap to see if synptom goes away. Otherwise the GM 'tap test has been around for years and seems to be reliable in many cases. Also try wiggling wires in connection to see if their is a response (loose pin connector). Make sure no vacuum leaks between MAF and throttle body. Other manifold lines included. Good luck.

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