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Engine choking/stalling when warmed up

hacket

hacket

New member
Engine died on me a couple of weeks ago on the way home. Pulled off and it started right up. Noticed that it was accelerating pretty rough/hesitating like it was wheezing.

Replaced the air filter (it needed it) and the IAC valve, didn't fix anything.

Finally got it to throw a P0102 code Low Mass Air Flow, so went out and got some MAF cleaner - didn't do anything to fix the problem.

It runs perfectly for the first 15 minutes, but after it warms up it starts choking and eventually dies. RPMS start dropping and it opens up to compensate, so revs up a little, then goes back to normal. Chokes about once every 30 seconds at first, until it won't even run.


Should I just replace the MAF sensor or might something else be up? It's weird that it shows only when the engine is warm.
 


check the wires to the maf for damage, aka cracks or missing insulation, if you see bare wire, you need a new pig tail.

or the maf is dead and you need a new one

also check fuse # 21 iirc. thats the fuse for the maf and the o2 sensor.

http://www.obd-codes.com/p0102
 
^^Yup
When it starts running rough, unplug the MAF after looking at the connector. If you need another MAF, I've got a couple that I'd let go cheap.
 
Thanks for the responses. I've got a wire probe kit coming in the mail that I can use to test the MAF (among other electrical issues I'm having).

Reptile, how much you selling one for?
 
Bill's maf test:
Start the car and let it warm up.
Pop hood and tap your finger on the top of the maf.
If there's a bad connection inside the sensor (common), it'll act up right there in the driveway.
 
BillBoost37 said:
Bill's maf test:
Start the car and let it warm up.
Pop hood and tap your finger on the top of the maf.
If there's a bad connection inside the sensor (common), it'll act up right there in the driveway.
Click to expand...

That's how I test my MAFs lol. I did that one day on my 97 and the engine sputtered everytime I tapped it. Replaced, tapped, scanned and fixed
 


I had that same issue on my delta 88. As soon as the car would warm up and exit loop mode it would die. Took me awhile but underneath the drivers side carpet is a bank of grounds. They were all corroded so i replaced the ground strip and spliced back every ground wire to were the pattina stopped and my problem was solved. Electrical issues gotta be the worse to track down. Get back with your prob and sol.
 
I replaced the MAF and everything seems to be running fine now. Taken it out a couple times and no stalling, idle is a bit smoother.

I actually tried testing it that way, by tapping on it, and that does work! Stalled every time once it was warmed up.
 
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