General Help please Hitting Fuel Cut

[dsmvenge]

So here is my issue. My car seems to hit fuel cut in first if i accelerate hard but if I'm in like fourth and punch it from 30 it gets to 10lbs and spudders and has no power. My fuel trims look good. I just upgraded to FIC 650 injectors and and Aeromotive AFPR my pressure is 43 on that. Mods are a 16g, SAFC, greddy bov, front mount. DP with no cat 3 inch Evo 3 o2 housing Thermal R&D catback and a wally 190

 

[Chicken Patty]

So here is my issue. My car seems to hit fuel cut in first if i accelerate hard but if I'm in like fourth and punch it from 30 it gets to 10lbs and spudders and has no power. My fuel trims look good. I just upgraded to FIC 650 injectors and and Aeromotive AFPR my pressure is 43 on that. Mods are a 16g, SAFC, greddy bov, front mount. DP with no cat 3 inch Evo 3 o2 housing Thermal R&D catback and a wally 190

Do you have a wideband? Also, what are you using to log your car?

 

[92AWDHX40]

Tuning device of some sort?

 

[dsmvenge]

Safc 2, palm n stien ,and yes i do have a wideband but i havent put it in yet. my trims are decent on my logger

 

[Sandman817]

How smooth does the car idle? If you are driving around normally does the car do the same thing, or is it only when you are under full load and boosting? If you have fuel and compression, the only thing left to test is the ignition. Remember when you start to boost the cylidner pressures increase substantuially and this puts a load on your ignition since there is more resistance for the spark to happen.


Seems to me, if you are hitting fuel cut(or so you think) at only 10 psi with a 16g turbo, it is most likely an ignition problem. Ohm out the coils and test the wires and post back with your findings

 

[dsmvenge]

car idles smooth as it did with stock injectors can drive it fine but when boosting or accelerating hard it cuts out and pops first gear hard acceleration cuts out at 9lbs 4900rpm. My car was fine with stock injectors at 15lbs I havent touched the boost or anything else except my safc to compesate the 650s and i put on an afpr my base fuel pressure is 42.5 . Should i just install my dsmlink i have everything for link just no time like my wideband

 

[Sandman817]

Install ecmlink and get a log of the car at idle showing RPM, ect, fuel trim, knock and grams per second, and anything else you would like to log. If it is possible to monitor with link, monitor cylinder misfires.

 

[Chicken Patty]

Sounds like car may be going really rich during WOT???

 

[dsmvenge]

thats what im thinking it does go rich like -10 to -12 on logger for st and -3 on lt

 

[Chicken Patty]

thats what im thinking it does go rich like -10 to -12 on logger for st and -3 on lt

Install the wideband and see.

 

[NOSLO2PT0]

What are you AFC settings at on the hi-throttle side?

 

[dsmvenge]

ok link is in so is the wideband now i need help i reset to stock settings and it ran better with my buddies tune from ams now i got a lil knock here and there and under idle its 15.0-15.3 and it leans out for no reason. How do i adjust the fuel at idle. Then under boost its so rich it doesnt even read on my wb. I got a global correction for my 650 fic and a 210deadtime. Im not sure what affect idle exactly its fine under normal driving like 14.5-14.9 but as i give more gas the richer it gets. then boost -- is all i see but it moves

 

[Chicken Patty]

ok link is in so is the wideband now i need help i reset to stock settings and it ran better with my buddies tune from ams now i got a lil knock here and there and under idle its 15.0-15.3 and it leans out for no reason. How do i adjust the fuel at idle. Then under boost its so rich it doesnt even read on my wb. I got a global correction for my 650 fic and a 210deadtime. Im not sure what affect idle exactly its fine under normal driving like 14.5-14.9 but as i give more gas the richer it gets. then boost -- is all i see but it moves

Dial in your airflow first on idle, airflowperrev should be around 0.25. Once that's set, then adjust your dead time to get your fuel trim as close to 0% as possible.

 

[ArticNemesis]

Boost leak test.

 

[dsmvenge]

I should adjust the dead time and not the global fuel correction my fuel trim is really close to zero

 

[Chicken Patty]

I should adjust the dead time and not the global fuel correction my fuel trim is really close to zero

If you set your global right, then don't adjust it further.

 

[dsmvenge]

Air flow is .25 dead time 195 global correction 31.5 seems ok now but still rich under boost the sliders are zeroed also
tell me how i post a log and i will