question

yota8791

New Member
Jan 20, 2009
242
0
0
virginia
ok so im having a problem trying to hit anything past 22psi it will run up that high and then its like the motor stops it just jerks and shuts down and the check engine will blink on but go right back off. car runs fine other than that. motor will hold it, 20g turbo, walbro 255, rc 550s, sard fpr, tuned with apexi neo. need :1zhelp: please.
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
10,730
1
38
Valley of the Sun
Fuel cut...I'm surprised you can go that high on boost ;)

Check your ECU codes to be sure...code 34 is a turbo overboost (i.e. fuel cut)
 

MA70Snowman

New Member
Oct 17, 2006
374
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San Diego
yeah, even w/ the neo, you can only tune BACK fuel cut, it will still be there. and indication on what your AFR is at 22psi? before/during/after the jerking? what gear and what RPM range are you in at that point? little more info regarding the issue will help pin point. But yeah, I'm surprised you're hitting 22psi at all w/o a modified ECU, FCD, or MAFT.
 

kamikazemkiii

Active Member
Mar 21, 2009
1,219
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36
North Carolina
fuel cut.. the stock ecu can only take so much
like things already said, the modds u have only raise fuel cut they dont eleminate it
ive heard the fcd is the quick way to pop your motor, fuel cuts there for a reason.
 

yota8791

New Member
Jan 20, 2009
242
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virginia
kamikazemkiii;1396712 said:
fuel cut.. the stock ecu can only take so much
like things already said, the modds u have only raise fuel cut they dont eleminate it
ive heard the fcd is the quick way to pop your motor, fuel cuts there for a reason.

well ive run a fcd since ive had the car and its fine, and i understand the ecu can only take so much but there are people on her running a 20g on stock ecu pushing 25psi
 

yota8791

New Member
Jan 20, 2009
242
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virginia
could it be detonation? i recently changed the gap from stock to .028. i tuned on stock could that pose a problem.
 

yota8791

New Member
Jan 20, 2009
242
0
0
virginia
kamikazemkiii;1397404 said:
its fuel cut we keep telling you what it is
if u dont want the advise dont ask for it
do some research and you should find out why

what are you talking about im taking the advice ok. its fuel cut i got my question answerd. just trying to get some more info, for my re-tune.