Quick list of the parts on the car
MSP Turbo w/ ATP 6lbs Actuator
Thunder manifold
SLS J/mid-pipe no cats
Custom FMIC with HKS SSQV
MAF relocated to boosted side
Head ported
MSP Injectors
MSP stock sparkplugs
MSP ECU
Vacuum holds a steady 20 at idle
Codes the ECU is throwing right now
P0140 O2 Sensor CKT No Activity Bank 1 Sensor 2
P0090 Fuel Pressure Reg 1 Control Circuit
I've been driving the car around for about a day to try and work out a major stumble in the powerband. As soon as the car sees about 4lbs of boost it starts to stumble really bad. It acts like it is dumping way too much fuel. Anything more than 1/4 throttle and it stumbles until the boost drops back below 4 lbs. I'm hoping a new O2 sensor and making sure I rewire the extension jumper correctly will solve the stumbling problem. I unplugged the 2nd O2 sensor completely and it did not change the way the car ran. I'm also very curious about the P0090 code. I've only seen it posted once on this entire forum and that post never received an answer. I don't have my factory service manual with me at the moment. Hopefully the diagnostic procedure for that code isn't too complicated. Between those two codes I'm hoping I can solve this stumbling problem.
I've seen some people suggest going with the Bosch universal 4 wire O2 sensor. That might be the first thing I stop and get today.
MSP Turbo w/ ATP 6lbs Actuator
Thunder manifold
SLS J/mid-pipe no cats
Custom FMIC with HKS SSQV
MAF relocated to boosted side
Head ported
MSP Injectors
MSP stock sparkplugs
MSP ECU
Vacuum holds a steady 20 at idle
Codes the ECU is throwing right now
P0140 O2 Sensor CKT No Activity Bank 1 Sensor 2
P0090 Fuel Pressure Reg 1 Control Circuit
I've been driving the car around for about a day to try and work out a major stumble in the powerband. As soon as the car sees about 4lbs of boost it starts to stumble really bad. It acts like it is dumping way too much fuel. Anything more than 1/4 throttle and it stumbles until the boost drops back below 4 lbs. I'm hoping a new O2 sensor and making sure I rewire the extension jumper correctly will solve the stumbling problem. I unplugged the 2nd O2 sensor completely and it did not change the way the car ran. I'm also very curious about the P0090 code. I've only seen it posted once on this entire forum and that post never received an answer. I don't have my factory service manual with me at the moment. Hopefully the diagnostic procedure for that code isn't too complicated. Between those two codes I'm hoping I can solve this stumbling problem.
I've seen some people suggest going with the Bosch universal 4 wire O2 sensor. That might be the first thing I stop and get today.