Need help
08-31-2009, 07:54 PM
#1
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Location: Fayetteville, AR
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Car: '89 Formula
Engine: T.P.I. 305
Transmission: Borg Warner T-5
Axle/Gears: Borg Warner 9 bolt - 3.70 posi
Need help
having problems with emissions yet again. failed on hc and co. all sensors are good, everything stock. I hooked up the laptop to it and i'm pulling a blm number of 129, still running rich. what are ideal readings for MAF and O2 voltage., any help would be awesome.
09-01-2009, 09:39 PM
#2
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Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: Need help
Well a blm of 129 is pretty good. I cant recall what ideal readings are for those sensors but if theres no check engin light and the car runs fine my guess is that it needs a tune up, air injection system needs help, or a new cat unfortunately. 129 BLM means its making virtually no corrections to the fuel delivery. How far are you off by?
09-02-2009, 07:45 PM
#3
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Car: '89 Formula
Engine: T.P.I. 305
Transmission: Borg Warner T-5
Axle/Gears: Borg Warner 9 bolt - 3.70 posi
Re: Need help
off by about 70ppm on hc at 15mph. i've had a problem with burning oil for a while, found out i had valves overtightened. fixed that problem, replaced the burned 02 sensor, was running great until i reset the computer. i'm thinking i burned up the cats too, because all of a sudden it blew smoke on me again and it smells really rich. might just have to suck it up and spend the 350 on cats.
09-02-2009, 07:57 PM
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Car: 85 Camaro IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: open rear, 3.42 gears
Re: Need help
129 blm is almost perfect, perfect being 128.
0 is taking out the max
255 is adding in the max
128 is right in the middle
0 is taking out the max
255 is adding in the max
128 is right in the middle
09-02-2009, 09:55 PM
#5
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Join Date: Mar 2008
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Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: Need help
off by about 70ppm on hc at 15mph. i've had a problem with burning oil for a while, found out i had valves overtightened. fixed that problem, replaced the burned 02 sensor, was running great until i reset the computer. i'm thinking i burned up the cats too, because all of a sudden it blew smoke on me again and it smells really rich. might just have to suck it up and spend the 350 on cats.
09-03-2009, 07:18 PM
#6
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Car: '89 Formula
Engine: T.P.I. 305
Transmission: Borg Warner T-5
Axle/Gears: Borg Warner 9 bolt - 3.70 posi
Re: Need help
yeah. nearest i can figure it through all the crap i put the cats through, the burning oil and a defective ignition module causing a couple of nice backfires. i think the cats are fried. once i reset the computer and through it back into relearn, which i think we can agree takes WAY too long, it just has to remember the settings.
