Engine stuttering

[garrett21]

Ok, I will try to get all the facts out right here...

I just setup my new FMIC and piping, I'm running a GM mass with a MAF-T, 550inj, stage Chip to correct for the 550's.

There is absolutely no boost leak!
The ISC has been replaced with a good one that I resistance tested
Same for the TPS
What is happening is the car will stutter / hit fuel cut when it is first seeing boost( 0psi-3psi) this is at about 50% throttle and in the 500 MAFS range, my wide band will go a little lean and then it goes fully lean when the engine hits the cut. While I'm driving...if I let the car rev up a little and stay out of boost, i can stomp on the gas it will stutter/ cut, but get past the bad spot, and will do perfect pulls.

I have tried fully rich on the maft and fully lean, there is nothing that will change where the "cut" is.

Any ideas?

Thanks in advance!

 

[xioca]

Check your plug wires.

 

[garrett21]

Here is a log!
The knock is from when my boost spiked
There is a long shift into 4th, because i was trying to get it past the bad spot.



TIMING TPS O2 ISC KNOCK RPM MAFS
13° 100.0% 0.96V 58 0 4500 0.0Hz
13° 100.0% 0.96V 58 0 4625 0.0Hz
13° 100.0% 0.94V 58 0 4719 0.0Hz
14° 100.0% 0.94V 58 0 4813 0.0Hz
13° 100.0% 0.94V 58 1 4906 0.0Hz
14° 17.6% 0.82V 55 0 4531 106.9Hz
42° 17.6% 0.72V 55 0 3531 56.6Hz
42° 17.6% 0.70V 55 0 3906 50.3Hz
42° 17.6% 0.70V 55 0 3844 50.3Hz
42° 17.6% 0.72V 55 0 3781 44.0Hz
42° 17.6% 0.70V 55 0 3719 44.0Hz
42° 17.6% 0.70V 55 0 3656 50.3Hz
42° 17.6% 0.74V 55 0 3469 44.0Hz
42° 17.6% 0.70V 55 0 3375 44.0Hz
29° 17.6% 0.02V 55 0 3469 50.3Hz
29° 17.6% 0.02V 55 0 3438 50.3Hz
29° 17.6% 0.02V 55 0 3219 50.3Hz
29° 17.6% 0.02V 55 0 3281 50.3Hz
29° 17.6% 0.02V 55 0 3281 50.3Hz
42° 29.8% 0.10V 71 0 3250 182.4Hz
42° 31.0% 0.16V 72 0 3344 201.3Hz
41° 31.0% 0.82V 72 0 3375 226.4Hz
41° 31.0% 0.16V 72 0 3188 220.2Hz
41° 33.7% 0.10V 75 0 3438 251.6Hz
36° 36.9% 0.90V 78 1 3469 421.4Hz
30° 38.4% 0.88V 80 0 3563 490.6Hz
30° 36.1% 0.90V 78 0 3594 452.9Hz
33° 36.9% 0.60V 78 0 3656 434.0Hz
30° 38.0% 0.90V 79 0 3719 540.9Hz
42° 100.0% 0.02V 94 0 3844 0.0Hz
9° 100.0% 0.96V 58 0 3969 0.0Hz
10° 100.0% 0.96V 58 0 4094 0.0Hz
11° 100.0% 0.96V 58 0 4406 0.0Hz
12° 100.0% 0.96V 58 0 4563 0.0Hz
13° 100.0% 0.94V 58 0 4813 0.0Hz
14° 100.0% 0.94V 58 0 5094 0.0Hz
15° 100.0% 0.92V 58 7 5438 0.0Hz
11° 100.0% 0.90V 58 25 5938 0.0Hz
9° 100.0% 0.88V 58 43 5969 0.0Hz
4° 100.0% 0.88V 58 43 6281 0.0Hz
3° 17.6% 0.80V 58 23 5875 245.3Hz
42° 17.6% 0.68V 55 0 4656 50.3Hz
42° 100.0% 0.21V 80 0 4813 94.4Hz
13° 100.0% 0.55V 62 0 4531 0.0Hz
13° 90.6% 0.49V 58 0 4469 0.0Hz
21° 99.6% 0.86V 83 0 4563 75.5Hz
13° 100.0% 0.96V 58 1 4625 0.0Hz
13° 100.0% 0.96V 58 0 4656 0.0Hz
13° 100.0% 0.96V 58 0 4750 0.0Hz
14° 100.0% 0.96V 58 0 4844 0.0Hz
14° 100.0% 0.94V 58 0 5031 0.0Hz
15° 100.0% 0.94V 58 0 5063 0.0Hz
15° 100.0% 0.94V 58 0 5313 0.0Hz
13° 36.9% 0.92V 58 1 5250 0.0Hz
42° 17.6% 0.66V 55 0 4125 50.3Hz