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Old 08-04-2006, 02:41 PM   #1
grannycar
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Default cobb stage 2 and problems..and questions

Member # 10057

posted 03 August, 2006 10:56 PM
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ok. i have a 04 sti.i had an injen cold air intake on it for a while. the long ram one.. and i know your not supposed to run an aftermarket tunner with the cobb soft ware, so i wanted to see what happens.. ok. well first. the car wants to stall all the time now. after i would get on it and come to a stop, it almost stalls. next i saw im only running about 17.5 lbs boost according to my accessport. then im reading the vaccum in psi at idle.. its onlt around -8.5 or something like that. i thought it should be around -20 psi.
is this all right? im knew to the sti's and turboed cars. i had nothing but mustangs before.
i have the stage 2 93 oct base map loaded right now.
my mods are some ebay company highflow catted "resonators" dp, to catback. full TBE. and the injen long ram intake. and now the cobb stage 2 accessport tunning soft ware...
can you guys help me out? are thoses numbers right or should i get another stock intake system and just put a k&n filter in the stock box?
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Old 08-04-2006, 02:45 PM   #2
grannycar
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well i put the stock intake system back on.. same boost about 18. then down to 14 or so. but when im at idle the car almost wants to die?? and my car is only pulling about -9.8 inches of vacumm at idle. PSI that is on my accessport.. arent they suppoesed to be around -20 or so??
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Old 08-04-2006, 02:45 PM   #3
scoobdude
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well first take off the intake.

Then.... go back and look at where you got this -20psi number and look at the unit of measurment they actually used (hint it invlolved mercury)

Are you running an AP or ST?

To your last question... stock intake, stay away from oiled filters.
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Old 08-04-2006, 02:47 PM   #4
scoobdude
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Now that you took off the intake, check for leaks. Also reset the ecu.
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Old 08-04-2006, 02:50 PM   #5
grannycar
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i didnt reset my ecu.
but what do you mean unit of measurment? im using an ap
and im in the read live boost mode when i read -9.6 or so at idle.. i remember on dsm's and vw 1.8t's you should be pulling about -16,-20 betwwen there on the vacumm side of a boost gauge. -9.6 seems extremly low.. what are you pulling?
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Old 08-04-2006, 03:54 PM   #6
Kenji815
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-9.6 is correct under no load at idle
and about -11.6 under load.
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Old 08-04-2006, 05:44 PM   #7
scoobdude
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on most boost gauges vacum is measured in some sort of measurment involving mercury. Boost was measued in PSI. On the AP you only have PSI.
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