Misfire at 15-20 psi - Saab Performance Bulletin Board - Saabnet.com
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Misfire at 15-20 psi
Posted by 91 900 AERO [Email] (more from 91 900 AERO) on Mon, 26 Feb 2007 05:58:09
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I have a 91 900 spg convertible, Swedish dynamics apc, Swedish dynamics 30lb injectors and eprom fuel chip, custom 2.5 inch exhaust system, spring modified wastegate. summer time the car became really fast after i installed all these parts, however i would only climb up to 20 psi then back down to 15psi, and if i keep my foot on it the boost would fluctuate, now that it is cold out, i run higher boost but the car starts to randomly misfire or buck any were over 15 psi. the misfire or whatever it is does NOT cause the known head into the dash fuel cut off effect, actually it feels more like if the car is just coughing while accelerating, some times it coughs and then it gets even faster then it coughs again.
Any one had this issue before and if so what caused it?
I tried calling Swedish Dynamics a few times but they are maybe gone ICE Racing? I beleive they usually do arround this time of the year? so i though i post here and see if i can get some feed back.
posted by 64.136.49...
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