LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Unplugging MAF and car dies?

Old Mar 18, 2003 | 07:38 PM
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Unplugging MAF and car dies?

I remember used to unplug the MAF and the car would still run..Now I unplug it and the car dies..What does this mean?

Cody
Old Mar 18, 2003 | 07:40 PM
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Same thing happens when I try to start my friend 94 Trans Am, guess it is normal
Old Mar 18, 2003 | 07:42 PM
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Don't worry this is normal. I Can't believe you car ran with the mass air unplugged. But some do.
Old Mar 18, 2003 | 09:19 PM
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Mine wouldn't run either and SES light would come on.
Old Mar 18, 2003 | 09:23 PM
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Mine ran the one time I had it unplugged, but the SES light did come on. I was like what the hell is going on? Then I saw that it was unplugged and then just plugged it back in and the light went off. I guess some run and some don't.
Old Mar 18, 2003 | 10:21 PM
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should still run in Speed Density mode. If it dies when you unlplug it, it should start back up and run on MAP readings alone. will set a code though. the 93's dont use a MAF sensor just MAP readings
Old Mar 18, 2003 | 10:31 PM
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I unplugged mine jsut to see how the car ran with speed density (sp?) but when I saw the SES light, I pluged it back in. The car still ran.
Old Mar 18, 2003 | 10:36 PM
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SnkEatr is right on the money, unplugging the MAF will force the car into speed density mode, give a fault code and turn both cooling fans on.
I unplug mine regularly just to make sure it's running correctly, plus you can unplug it when doing the seafoam trick to keep the car running when you pull the bellows off of the throttle body..


It might be stalling just due to the "shock" of unplugging it while the engine is idling. Have you tried unplugging it and then starting the car? Just a thought.
Old Mar 18, 2003 | 10:38 PM
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also, I just read your mods, since you're running a stroker, the default speed density tables may no longer work for your configuration correctly.
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