RKA

Any other signs of running too rich (smell of unburned fuel, black carbon deposits around the tailpipe/bumper, black puff of smoke behind you when you punch it, poor fuel economy.

Can you swap in a few coolant temp sensor...just for the sake of ruling out another potential headache?

Also (forgive me), which FPR was the K04 program intended to be used with?

Check the MAF wiring harness as well. While the car is idling, jiggle the harness around and see if there is an intermittent connection causing an issue. These wires are rather fragile, so this wouldn't surprise me.

JohnnyBravoa4

i have a gauge, we are going to test it, but i have been getting the same boost # since the install

ThirdEye

but I think maybe you made a mistake when you wrote that, as the standard k04 file uses the 5bar. I would imagine Momentum knew what they were doing as it ran fine for 3 months.

The PC16 file tends to run really rich down low and then pretty lean up top. I woulnd't be surprised if it has fouled your 02 sensors since installation.

When I had a bad 02 sensor I encountered some hesitation as well. I think it's worth a shot.

JohnnyBravoa4

the 310 injectors are not installed i have them but waiting till i figure out the problem

JohnnyBravoa4

the FPR is set to 5 bars or just a tad under that, i think the guys said 4.5 bars they tested it and got it running good..

JohnnyBravoa4

both o2 sensors are brand new as well

RKA

You said this in your initial post. I read it, and dismissed it because there was no evidence attached to it. Is this more than a gut feeling? Did you log anything to confirm what you believe? If so, how do you explain the flames coming out of the tailpipes?

JohnnyBravoa4

it feels more like a fuel cut because it it rather similar to the fule cut my friends wrx when he over boosts, its the same engine response.. i really dont know what it is, and it could be anything thats why i posted here to get some feed back..

RKA

Take a systematic approach to figuring out what's going on.

First find out exactly what the symptoms are. Log the car to see what cylinders are misfiring, and how many misfires you're getting. Log the primary O2 to see if you're running lean, and under what conditions (load and rpm).

Once you nail down the symptoms, THEN you can speculate about the possible causes and backtrack.

JohnnyBravoa4

i dont get any cels or check engine light so i dont know or cant figure out which cylenders are misfiring,it had a cylender misfire in cylender 1, i switched the coil pack, still had the problem i changed the coil pack.. still have the problem but i only got the check engine light once.. i have done a log b4 but the problem is highly intermitant and i never know when it is going to happen so.. everytime i try to log it it runs fine..