I was just out logging did some 3rd gear pulls and some 4th gear pulld everything was fine. i did a 3rd gear pull and shifted to 4th got back on it then hit fuel cut around 5k rpm. All the log shows is the afr go to 14 then 18 when fuel cut activated. No knock, timing was the same as a normal 4th gear pull. It is 20deg out, idk. Oh an my friend was behind me an said when i hit fuel cut i shot out flames.

 

Due to the colder, denser air your car went over the set boost limit in your ROM. You should check your logged load vs the set load limit in the "boost limit" table.

 

boost limit is set to 319, the higest load i logged was 250load and that was durning the 3rd gear pull, when i hit fuel cut i was 220-230load.

 

Just some other info i logged, air temp was 35deg, maf air temp was 37deg, out side air temp was 20-30deg. Coolant temp was 188deg where i hit fuel cut and was 185deg durning the 3rd gear pull.

 

Anyone? This is really pissing me off, i cant finish a damn 1/4mile. It will sometimes happen right when i shift to 4th from wot 3rd or let me get to 5k then hit fuel cut, but i cant finish 4th gear if i shift into 4th from 3rd wot.

 

Help!!!!

 

Are you sure its fuel cut? Could it be an ignition problem?



-Em

 

ya my log shows the fuel going to 18.4 which is the highest a aem will read. injector duty cycle is at 90% max .

As for ignition, im gonna check my spark plugs. Theres new 7mm wires maybe 4k on them. NGK plugs 2 stages colder .28 gap.

 

Ill try and post the log if that will help i need this fixed asap!

 

You sure it isn't a misfire? Post the log...it may help.

 

No knock was logged, so i dont believe it was a misfire. I cant find the log, ill post it up tonight when i get out of work.

 

A misfire won't necessarily log as knock. Spikes in the 02 sensor or wideband are good signs of a misfire.

 

I have the prob and watched my boost gauge. Mine is an overboost.

See how high you boost is going.

 

post a picture, but i recommend rechecking your spark...or maybe the car went into limp mode.

 

Well i found the problem. Injectors peaked at 151% duty cycle. Idk how when i was on a dyno i was at 85-90%. i did put on a bigger downpipe and bigger intercooler, guess they helped alot more than i thought. Time for bigger injectors