japslapsilvia
05-25-2010, 01:01 PM
Got a buddy of mine that is having this problem lately with his SR.
Background
I did the swap…probably about 3-4 years ago never gave any problems….motor was mechanically sound….
S13. SR Redtop.
Catback
Ebay manifold
FMIC
Z32 tt Fuel pump.
Blitz filter
HKS EIDS
Turbo XS BOV....does not leak at idle
Greddy Coolant expansion tank
Everything else STOCK.
About 3 weeks ago about we swapped the turbo for a new S15 spec R…and we are using the stock SR manifold and Greddy Dump pipe.
New plugs NGK Iridums heat range 7
Mishimoto radiator
Braided SS turbo lines. And a new OEM exhaust gasket.
Now the problem that he is having is that the car Misses ….ALOT feels like its running on 2 cylinders.
Takes forever for the motor to rev past 3k in any gear….usually spits n pops.
At about 4k motor will rev fairly smooth but still takes a lot of effort for it to get up to 5k…in third gear.
Idle is a little rough as well…..it use to be very solid no hunting…
Pulled the plugs…# 1 and #3 are good 2 and 4 are pretty black…
Runs super rich…
Swapped ignitor for a known working one….no change….unplugged #2 injector…no change in idle.
Swapped injector for a known good one….idle got better….did the same for #4
Idle got a little better. Still drives like poop…being that the car runs rich I thought one of the injectors was stuck open or leaking past o-ring
I pulled fuel rail…key on….no leaks at all.
Also we checked for VAC leaks…none
Cleaned IACV…no change in idle quality.
Cleaned MAF…made no change.
Im concluding that it’s a spark issue…and not a fuel problem.
Will be working on the car this weekend….will check base fuel pressure.
Will also try to check the individual coil packs.
Anything else that I should be looking for…or check?
Im really stumped and it probably something simple that im missing…
Will also pull codes on ECU….
TIA
Background
I did the swap…probably about 3-4 years ago never gave any problems….motor was mechanically sound….
S13. SR Redtop.
Catback
Ebay manifold
FMIC
Z32 tt Fuel pump.
Blitz filter
HKS EIDS
Turbo XS BOV....does not leak at idle
Greddy Coolant expansion tank
Everything else STOCK.
About 3 weeks ago about we swapped the turbo for a new S15 spec R…and we are using the stock SR manifold and Greddy Dump pipe.
New plugs NGK Iridums heat range 7
Mishimoto radiator
Braided SS turbo lines. And a new OEM exhaust gasket.
Now the problem that he is having is that the car Misses ….ALOT feels like its running on 2 cylinders.
Takes forever for the motor to rev past 3k in any gear….usually spits n pops.
At about 4k motor will rev fairly smooth but still takes a lot of effort for it to get up to 5k…in third gear.
Idle is a little rough as well…..it use to be very solid no hunting…
Pulled the plugs…# 1 and #3 are good 2 and 4 are pretty black…
Runs super rich…
Swapped ignitor for a known working one….no change….unplugged #2 injector…no change in idle.
Swapped injector for a known good one….idle got better….did the same for #4
Idle got a little better. Still drives like poop…being that the car runs rich I thought one of the injectors was stuck open or leaking past o-ring
I pulled fuel rail…key on….no leaks at all.
Also we checked for VAC leaks…none
Cleaned IACV…no change in idle quality.
Cleaned MAF…made no change.
Im concluding that it’s a spark issue…and not a fuel problem.
Will be working on the car this weekend….will check base fuel pressure.
Will also try to check the individual coil packs.
Anything else that I should be looking for…or check?
Im really stumped and it probably something simple that im missing…
Will also pull codes on ECU….
TIA