christians87
Member
- Joined
- Jul 23, 2007
I did a search and couldn't really find what I was looking for so here we go. The car will not make over 15 psi boost no matter where the boost controller is set, and has a random cylinder misfire while under boost. When it misfires it will sometimes cause knock and sometimes it may not. I have installed new spark plugs (gap set at .035"), o2 sensor, fuel filter, and the vac lines at the vacuum block on top of the throttle body. I had been chasing the misfire for a while now. It started when I installed a tt alky chip that had been re-burned for 60 lbs inj. and would only occur at wot.
As for the boost issue, never had one until I just installed a se turbo 3" dp. I have checked the hole intake system for hoses off and blown couplings. I even pressurized the hole system and there were no leaks at all. I also tried taking off the line going to the waste gate to make the car produce full boost. While testing it I would slowly roll into the throttle making sure to watch the boost gauge so it wouldn't go too high. Well it would knock every time it got around 10 psi and the one time it didn't knock it only made 15 psi. I only tried 3 times by the way. Since the boost still didnt get over 15 psi the only thing that i can think of would be the wg puck isn't covering the wg hole in the turbo. If thats it what can be done to fix this very annoying issue. Also it has an off idle hesitation.
Fuel pressure at idle is usually around 40 to 42 psi
The o2's on the scan master have also been reading a little rich during normal driving, im seeing numbers above 800 a lot, don't know if its normal or not, but at wot its around 780 to 820ml.
There are no trouble codes.
Its also got a full new type two ignition set up.
All my mods are listed in sig. And all advice is graciously accepted. Thanks in advance.
Christian
As for the boost issue, never had one until I just installed a se turbo 3" dp. I have checked the hole intake system for hoses off and blown couplings. I even pressurized the hole system and there were no leaks at all. I also tried taking off the line going to the waste gate to make the car produce full boost. While testing it I would slowly roll into the throttle making sure to watch the boost gauge so it wouldn't go too high. Well it would knock every time it got around 10 psi and the one time it didn't knock it only made 15 psi. I only tried 3 times by the way. Since the boost still didnt get over 15 psi the only thing that i can think of would be the wg puck isn't covering the wg hole in the turbo. If thats it what can be done to fix this very annoying issue. Also it has an off idle hesitation.
Fuel pressure at idle is usually around 40 to 42 psi
The o2's on the scan master have also been reading a little rich during normal driving, im seeing numbers above 800 a lot, don't know if its normal or not, but at wot its around 780 to 820ml.
There are no trouble codes.
Its also got a full new type two ignition set up.
All my mods are listed in sig. And all advice is graciously accepted. Thanks in advance.
Christian