2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

low boost, 10.5 afr wtf need help.

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Old Aug 8, 2009 | 02:12 AM
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wtpcobaltss's Avatar
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From: bowling green ky
low boost, 10.5 afr wtf need help.

just recently my car has been running about 15 psi and wot afr of 10.5-10.7, before it was about 18 psi and 12.2 afr and ran beautifully. now after i installed my intake about 5 months ago the the screws for the maf werent going into the injen intake very well so i tightend as much as i could so it would hold ( i think the screw hole was a bit to big for the screw) anyways i go to the track and run a 14.02 at 103 mph well i was really wanting 13s so i went home and decide to do a minor tune up, when i went to replace the air filter i noticed the maf was halfway hanging out of the intake, so i got new screws and bolted it down nice and tight.. after that i went back to the track and couldnt do better then 14.4 at 100 i even ran a 14.6 at 99...and its running really really rich after i fixed the maf...any ideas what the hell is going on?
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Old Aug 8, 2009 | 04:36 AM
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From: Chicago, IL
Originally Posted by wtpcobaltss
just recently my car has been running about 15 psi and wot afr of 10.5-10.7, before it was about 18 psi and 12.2 afr and ran beautifully. now after i installed my intake about 5 months ago the the screws for the maf werent going into the injen intake very well so i tightend as much as i could so it would hold ( i think the screw hole was a bit to big for the screw) anyways i go to the track and run a 14.02 at 103 mph well i was really wanting 13s so i went home and decide to do a minor tune up, when i went to replace the air filter i noticed the maf was halfway hanging out of the intake, so i got new screws and bolted it down nice and tight.. after that i went back to the track and couldnt do better then 14.4 at 100 i even ran a 14.6 at 99...and its running really really rich after i fixed the maf...any ideas what the hell is going on?
perhaps the maf was damaged while it was hanging out like that?, or maybe it just got dirty, try cleaning it and see if that helps, other than that idk
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Old Aug 8, 2009 | 04:49 AM
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From: bowling green ky
Originally Posted by zay52790
perhaps the maf was damaged while it was hanging out like that?, or maybe it just got dirty, try cleaning it and see if that helps, other than that idk
i checked it and it looked fine but ill get some cleaner and try it..still confused on why it rans so great without the maf,,without any dtc's
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Old Aug 8, 2009 | 05:09 AM
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From: Los Angeles
maybe during the previous tuning, the MAF was out like that, so your AFR was tuned around a messed up MAF?
IDK if the OTTP tune is canned/MAF based or what....
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Old Aug 8, 2009 | 05:24 AM
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From: bowling green ky
Originally Posted by HunterKiller89
maybe during the previous tuning, the MAF was out like that, so your AFR was tuned around a messed up MAF?
IDK if the OTTP tune is canned/MAF based or what....
naw i just sent them my pcm and they send it back witht there tune.
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Old Aug 9, 2009 | 12:56 AM
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From: Chicago, IL
maybe when the maf popped out the car changed the fuel trims to make up for the maf, and then its running rich now that the maf is back in?
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Old Aug 9, 2009 | 01:42 AM
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06SS ALL DAY's Avatar
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From: Philthydelphia, PA
try putting the stock intake back on with just air box mod...
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Old Aug 10, 2009 | 03:33 PM
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Originally Posted by zay52790
maybe when the maf popped out the car changed the fuel trims to make up for the maf, and then its running rich now that the maf is back in?
this was my other idea. try unplugging the battery for a few mins?
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Old Aug 10, 2009 | 07:29 PM
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From: bowling green ky
yyea i tried it all didnt work..thanks for the help i guess ill just get a new tune.
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Old Aug 10, 2009 | 07:56 PM
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From: Central Florida
whats stock psi for ss/sc? hope you get it fixed
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