97ws6ta

has ported polished heads ,intake ,cam ,12 lb s trim 255 pump 50 lbs injectors pulls like hell to 5200 rpm 408 rwhp ,then its done. runs good until then. list of new parts is crazy. I have tried everything I can think of . All Ideas would be great thanks Larry

teke184

you've tried the coil and checked all the wires?

agrsiv95

Isn't there something with the MAF and OBDII cars that when the MAf maxes out the car falls on its face. I have a 95 OBDI so I never worried about. If I remember correctly, ATI makes something to combat the MAF maxing out.

J

slimdawson

Yep, ATI makes a code buster for the obdII cars. It keeps the high MAF code from setting. Not sure if that is the problem.

A little more info on the symptoms would be helpful. Does it shut off immediately? Does it break up? Will it continue to pull past that only roughly? If it shuts off at exactly 5200 rpms every time, it is most likely electrical. Check your program.

My car was cutting off around 4500 about 30% of the time. I regapped my plugs to .035 (I am running 8lbs) and haven't had the problem again yet.

Tell us a little more info if you can.

97ws6ta

it breaks up after 5200 if you shift every time at 5200 runs great has new plugs ,opti ,fuel pump, filter ,injectors ,msd coil, 6abox,it will run past that but not good feals like a clogged cat ,but there are no cats on the car

slimdawson

Take the MSD6a off and try. I have known of quite a few to cause problems like that.

BlownF1

What are you running for intake ducting to the blower? Could it be the collapsing "dryer ducting" issue?

97ws6ta

I did that I had a crane hi6r so i tried the msd same results and the ducting is fine !!

slimdawson

Does it do it in any gear? Will it do it in neutral or only under load?

Have you checked the fuel psi while running it?

I wonder if you are running into any knock.

97ws6ta

it seams to rev fin does it in all gears fuel psi is 60 wot

slimdawson

Are you still running stock timing?