Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

More problems with the Z, surging stops if i disconnect MAF!!!

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Old Nov 22, 2009 | 01:04 AM
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Joined: Sep 2009
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From: chicago illinois
Unhappy More problems with the Z, surging stops if i disconnect MAF!!!

ok so just when i thought i was free of problems, it once again started an im having problems with the beast... I thought i fixed the problem i had earlier with the car surging/bogging or however its called when shifting into drive or reverse as low as 500 rpm and slowly correct it self to set idle, and the car accelerating on its own at a stop, and me having to stand on the brakes.....WEEELL...

I took it back to the tuner with the info given by a fellow member here.. "ws6terror" and tuner messed with it and drove it and everything was fixed......Atleast thats what i thought... after he messed with it, the car would pick up speed on its own but now only up to like 11 miles and just cruise there.. where before it was picking up speed and shifting all the way to 3rd and kept going.. I was told this is normal. Any one disagree??

FYI when the day i took it, it was raining and somewhat cold....I dont know if it has to do with temperature or weather or what, that the car acts weird on me or what..

I dont know, but the fact of the matter is that the problem is BACK!.. how the hell can the car just accelerate on its own like that.... its making me mad....

i searched the forums and found that when it surges it could be a dirty MAF.... Being that i already changed TPS, IAC, IAT... well my last hope was the maf.... I unplugged it and the car dropped rpm but quickly corrected itself..

I read that if this happens, then the MAF is working correctly, RIGHT???

Any who, I got back in the car and shifted to reverse, and bam! the idle droped to like 650ish-700 and didnt even surge or anything, it just sat there stedy..... like a normal car....
Drove it and it drove beautiful...

all it needed was the idle lowered and it would be perfect..since it seemed too high...
but i noticed the idle sound out the exhaust changed, it almost sounded as if the car was stock, but with the MAF plugged you hear a small choppy idle in there......


so, shut off the car, plugged it back, and tried it again and it did the same thing.....

This lead me to beleive the MAF was dirty, so i cleaned it with no luck,.... I swapped it with a working one and still the same thing ..... I dont know what the hell is going on here..... Why does it run better with no maf? what else can be wrong here?

I was told since the beginning that this could all be cured with a stall since i probably have the stock one..thats the only thing i dont know about the car...

I honestly do not know if it has a bigger stall, although i noticed that it cruises at about 1900rpm on highway....

But why does everything seem to work perfectly with MAF unplug if it needs a stall to fix the problem?? i dont get it


PLEASE someone help

WS6TERROR, i hope you can help me with this one if you read this.... THANKS in advance......
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