tuff5liter

ok installed a new cobra intake and an adj fuel pressure regulator. I adjusted the fuel pressure regulator to 43 (with the vacuum line off, which i was told was stock) but it wont let me accelerate past about 2600 rpm and itll start backfiring and running like butt.

I dont have to many mods to the motor just BBK Cold Air Induction, 75mm Mass Air Flow Sensor, BBK Shorty Headers, BBK X-Pipe, Flowmaster 2 Chamber Mufflers, BBK 190 LPH Fuel Pump, Wolverine/Blue Racer 1087 cam (289/299 duration with a 510/534 lift) 70mm Throttle Body, and a MSD 6AL ignition. Everything else i have done to it has been interior wise and suspension. Any help would be greatly appreciated.

PRO50SC

What is the idle quality. Is it smooth or does it have a misfire. Could have crossed something or not got the dizzy in right or the timing is off. Could be lotsa stuff.

tuff5liter

idle is very smooth altho it is alot deeper with the new intake (is that normal?)

PRO50SC

What do you mean by deeper? Did you set the timing correctly?

92hatchLX

Yeah it's normal, your takin in a lot more air, so you'll be pushing out more air.

tuff5liter

its not misfiring at all but it is deeper like a lower tone. I dont have a timing light so i had to mark it then put it back as close as possible.

PRO50SC

You def need a timing light. That could be the whole problem. You can try turning the dizzy a little at a time and driving it.

tuff5liter

imma go get a lil cheapo one at autozone ill be back and let ya know what happens with that

PRO50SC

Don't forget to take the spout out when setting the timng.

tuff5liter

do i need to unhook the MSD? Bc it sont adjust any higher than 0* my TFI module hits my thermostat housing