FD backfires on startup and idles very low: Fix opinions
08-29-13, 03:58 PM
#1
FD backfires on startup and idles very low: Fix opinions
Hello rotary lovers, I have ran into my second problem in my fd. So here it goes.
First off Ill let yall know what ive done to my FD 93.
13b-rew
boost guage
air to fuel guage/ wideband sensor
Power fc with commander
Apexi boost controller avcr
egr delete
walbro 244 fuel pump
BNR stage 3 sequential turbos
3" straight pipes down, mid,catback
v mount radiator and intercooler
thats about it.
so heres what happened. I was driving, boost set on 1.10kgcm2 with 50% duty cycle. water temps at 83c air temps at 48c, im ready to enter the freeway where at like 16 psi I get a fuel cut (car chokes) i let go off the gas pedal and keep rolling, until i step on the gas again, and my boost gauge is jumping from 0-0.3 0 to 0.3 and back down to 0 really fast and the more gas i give the more it bogs up and down up to 0.5, and holds it up there for a while. So i got to a stop light and my air to fuel is showing 9.3 richness on idle and its idleing at like 300rpm. And i need to rev it all the way up to 5krpm to get the car to go, or if to low it might stall, it feels like it. I took it home, let it cool down, checked the intercooler hoses the y pipe coupler everything seems to be tight with no leaks. I have no idea what it can be, and what could of happened, I checked my down pipe and everything seems to be on tight cant find no loos lines, I have yet to check my fuel pump and my tps, but besides that im running out of ideas, anybody please help me! I also started the car this morning it starts with a back fire because of the richness, but it starts fine just idles very low and the whole engine boggles, why am I getting this hesitation? please just give me ideas and ill check.
First off Ill let yall know what ive done to my FD 93.
13b-rew
boost guage
air to fuel guage/ wideband sensor
Power fc with commander
Apexi boost controller avcr
egr delete
walbro 244 fuel pump
BNR stage 3 sequential turbos
3" straight pipes down, mid,catback
v mount radiator and intercooler
thats about it.
so heres what happened. I was driving, boost set on 1.10kgcm2 with 50% duty cycle. water temps at 83c air temps at 48c, im ready to enter the freeway where at like 16 psi I get a fuel cut (car chokes) i let go off the gas pedal and keep rolling, until i step on the gas again, and my boost gauge is jumping from 0-0.3 0 to 0.3 and back down to 0 really fast and the more gas i give the more it bogs up and down up to 0.5, and holds it up there for a while. So i got to a stop light and my air to fuel is showing 9.3 richness on idle and its idleing at like 300rpm. And i need to rev it all the way up to 5krpm to get the car to go, or if to low it might stall, it feels like it. I took it home, let it cool down, checked the intercooler hoses the y pipe coupler everything seems to be tight with no leaks. I have no idea what it can be, and what could of happened, I checked my down pipe and everything seems to be on tight cant find no loos lines, I have yet to check my fuel pump and my tps, but besides that im running out of ideas, anybody please help me! I also started the car this morning it starts with a back fire because of the richness, but it starts fine just idles very low and the whole engine boggles, why am I getting this hesitation? please just give me ideas and ill check.
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