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MAF calibration

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Old 03-03-2005, 02:10 AM
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Car: 1985 IROC
Engine: 305 TPI
Transmission: 700r4
MAF calibration

I just changed out my MAF because it was totally fried and ever since I put the new one in, I lost power in general and a lot at 3000 rpm. I heard that is a calibration broblem. is it and how can I fix it?
Old 03-03-2005, 02:18 AM
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Car: 85Z28 87GTA 91GTA 98SS
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Custom porgramming. If you didn't need it before the maf swap then you don't need it now. Your new maf may be bad or you are due for a tuenup.
Old 03-03-2005, 10:14 AM
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Re: MAF calibration

Originally posted by davcamaro
I just changed out my MAF because it was totally fried and ever since I put the new one in, I lost power in general and a lot at 3000 rpm. I heard that is a calibration broblem. is it and how can I fix it?
Did you disconnect the battery for a few minutes to erase what the ECM has learned since the last time the batery was disconnected? (restores factory defaults)
Old 03-03-2005, 01:02 PM
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re:battery

I'll try cutting power to the ecm, maybe that is my problem, I'll keep you posted, thanks
Old 03-03-2005, 02:36 PM
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also make sure you have the right maf sensor, I noticed you have an '85 and they are a bastard year. They all look the same and I think they all have the same plug but there was one for '85, one for '86-'87 and one for '88-'89 iirc.
Old 03-03-2005, 02:45 PM
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Did a little digging: (gmpart #'s)

'85 - #14081243
'86 - '87 #14094712
'88 - '89 #10055877
Old 03-03-2005, 06:33 PM
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type of MAF

I have a bosche MAF (from napa), but I am not sure right now what the part number is, I'll check it and get back to you
Old 03-03-2005, 06:45 PM
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You will have to do a x-ref. GM part #'s will not match Bosh part #'s.
Old 03-03-2005, 11:44 PM
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Originally posted by Cooper
also make sure you have the right maf sensor, I noticed you have an '85 and they are a bastard year. They all look the same and I think they all have the same plug but there was one for '85, one for '86-'87 and one for '88-'89 iirc.
The 85' has a separate MAF control module that piggy backs on the ECM. On later models the MAF control was integrated into the ECM.
Old 03-04-2005, 03:43 AM
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I unplugged the battery for a few minutes and ran it. it seemed reasonable fine, but the real test will be running it in the day. I am not sure if runns like it used to though, it has been a while since I changed the MAF. according to the napa website, the part number for the 85 GM MAF is the same thing as the one I have, just a different company. does heat and/or daylight have anything to do with the MAF?
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