Trinidrift3
01-01-2015, 04:16 PM
1st off thanks for reading and giving any type of helpful comments
-i do not drive much or for long distances
-i was driving Christmas eve and at a stoplight i saw my idle afr was 17:1 or reading full lean (---). normally it was 14.5-15.5:1
-headed straight home. i drove to the next stoplight and held the throttle open a bit to rich it up a little while i waited. as i pulled off it stalled in the intersection and would not restart
- i pushed it to a parking lot, popped the hood and looked around for 30secs. went back in and it started right up. drove home and parked it
-ever time i start it from cold it goes to 13:1, as it warms up it slowly drops full lean. at operating temp it idles around 16.5:1 to ---
-boost/vacuum gauge shows -20hg at idle
-changed fpr and fuel filter. pulled walbro 255 and hardwired to make sure it ran smooth.
-fuel pressure is 40psi at idle with vacuum on fpr. if i start it without fpr vacuum it's 50psi and idles everywhere
- at idle it does not misfire and revs up normal. im pretty sure its not a bad wideband sensor because the exhaust sounds poppy which indicates lean. drove it around the block fine so it is driveable
Any idea on what i could be, or where to search? people keep saying vacuum leak but i haven't found one. im completely stumped right now and resorted to making a thread for this.
car has redtop sr20det, apexi pfc, stock injectors in, walbro 255, z32 fuel filter
-i do not drive much or for long distances
-i was driving Christmas eve and at a stoplight i saw my idle afr was 17:1 or reading full lean (---). normally it was 14.5-15.5:1
-headed straight home. i drove to the next stoplight and held the throttle open a bit to rich it up a little while i waited. as i pulled off it stalled in the intersection and would not restart
- i pushed it to a parking lot, popped the hood and looked around for 30secs. went back in and it started right up. drove home and parked it
-ever time i start it from cold it goes to 13:1, as it warms up it slowly drops full lean. at operating temp it idles around 16.5:1 to ---
-boost/vacuum gauge shows -20hg at idle
-changed fpr and fuel filter. pulled walbro 255 and hardwired to make sure it ran smooth.
-fuel pressure is 40psi at idle with vacuum on fpr. if i start it without fpr vacuum it's 50psi and idles everywhere
- at idle it does not misfire and revs up normal. im pretty sure its not a bad wideband sensor because the exhaust sounds poppy which indicates lean. drove it around the block fine so it is driveable
Any idea on what i could be, or where to search? people keep saying vacuum leak but i haven't found one. im completely stumped right now and resorted to making a thread for this.
car has redtop sr20det, apexi pfc, stock injectors in, walbro 255, z32 fuel filter