MAF trouble?
10-19-2003, 02:04 AM
#1
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Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
MAF trouble?
According to my Auto X-Ray my MAF is reading 11776gr/sec when the car isn't even running. Is this a sure sign it is bad? Or maybe there is some buildup on the element? I get an occasional code 33 and changed the relays a while back. Usually when the code comes up I get a lot of hesitation almost like a fuel problem. This is a stock replacement MAF that I have had for several years with the screens removed.
10-19-2003, 06:08 PM
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Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
LOL, I guess I should have checked that before but at the time I was only looking for SES codes.
At about 2000RPMs it reads in the 6000 gr/sec range and at 3800RPMs it is in the 12000 gr/sec range.
At about 2000RPMs it reads in the 6000 gr/sec range and at 3800RPMs it is in the 12000 gr/sec range.
10-19-2003, 06:19 PM
#4
Originally posted by DannyT
LOL, I guess I should have checked that before but at the time I was only looking for SES codes.
At about 2000RPMs it reads in the 6000 gr/sec range and at 3800RPMs it is in the 12000 gr/sec range.
LOL, I guess I should have checked that before but at the time I was only looking for SES codes.
At about 2000RPMs it reads in the 6000 gr/sec range and at 3800RPMs it is in the 12000 gr/sec range.
10-19-2003, 06:29 PM
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Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Hmm, well I know I need to turn my idle down but without the proper chip I have to keep the FP high for performance. I rechecked the scan and the lowest reading was 2851 gr/sec at 1100 RPMs. I have a 58mm TB (among many other mods) if that matters.
10-20-2003, 11:05 AM
#7
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Danny,
Disconnect the electrical connector at the MAF, turn the key on and now look at the MAF reading, it should default to 255gr/sec...if still reading those wild-high numbers, could be scanner or ECM issue.
Disconnect the electrical connector at the MAF, turn the key on and now look at the MAF reading, it should default to 255gr/sec...if still reading those wild-high numbers, could be scanner or ECM issue.
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10-20-2003, 08:07 PM
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Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Originally posted by 8Mike9
Danny,
Disconnect the electrical connector at the MAF, turn the key on and now look at the MAF reading, it should default to 255gr/sec...if still reading those wild-high numbers, could be scanner or ECM issue.
Danny,
Disconnect the electrical connector at the MAF, turn the key on and now look at the MAF reading, it should default to 255gr/sec...if still reading those wild-high numbers, could be scanner or ECM issue.
10-20-2003, 09:05 PM
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Car: 89 Iroc
Engine: 383
Transmission: 700R4
Axle/Gears: 3.45
Originally posted by madmax
I wouldnt trust that Autoxray if I were you. Find someone with a different scanner, see what it says then. That and, it wont read 0 with the key on engine off anyway, I forget what they do read but its not 0.
I wouldnt trust that Autoxray if I were you. Find someone with a different scanner, see what it says then. That and, it wont read 0 with the key on engine off anyway, I forget what they do read but its not 0.
Can anyone else confirm what their MAF values are when it is disconnected?
10-21-2003, 05:49 PM
#11
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As I mentioned before, with the MAF uplugged and key on, mine read 255...using my SnapOn scanner.
Maybe someone else will be able to verify as well.
Maybe someone else will be able to verify as well.
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