what do you think it is

[redrockergsx]

I just data logged my car and was running 15 to 18 psi cant tell cause the car cuts off. I ran it up to 4500 rpm and it cuts off.

The data logger show .80v to .90v on the o2 im running 0 to 2 knock

was just wondering if you the car had a boost leak would it seem like the car was hitting fuel cut

Cause the car runs absolutely perfect at 12 psi and not cut offs zero knock just the best you can think off so it has narrowed down to a boost leak just seeing what you think.

Not sure if you guys need it but the car is running a garret 50 trim with a safc, 750 injectors, 255 walbro, 272 cams, 2g maf that im going to gm maf,

 

[gringo72884]

are you running a afpr with that 255 fp?

 

[redrockergsx]

Im am not run a fpr

can boost leak be mistaken for fuel cut. cause when this thing happens is sputters really bad can that be due to a boost leak

 

[allrice4g63]

boost leak past 12 psi.

 

[gringo72884]

seems like your over running your stock fpr....get your self a AFPR. Also, you're running 750 injectors with a safc....you"re going to have a really tuff time tuning with a 255 fp, 750 injectors with a safc....you wont be able to lean out enough with that setup. Right now you are running way rich

 

[RedEyeBanDiT]

My car was doing the same thing above 4500 rpms. It was a bad coil pack. Hope that helps.

 

[shockracer]

what is your spark plug gap?