Engine Stumbles at Mid Boost. but at Full and no Boost runs fine.

[ShadowMKIII]

I tried to search the issue and could only come up with a 2 yr old thread that ended without a def answer... and my issue is somewhat different.

So here is my issue: When im traveling down the road without pulling boost its runs great. And when I get on it (WOT) it pulls hard and without a hiccup. But if it runs in the middle (midboost) it will be ok for about 5 to 10 seconds then just start to shutoff or hit a wall... It will regain then stumble again.

Its not intermittin its all the time everytime...



here is the old thread I found to prove I searched lol... http://www.supramania.com/forums/showthread.php?t=39597&highlight=boost+stumble&page=2

 

[SideWinderGX]

Look at post #16 in that thread, looks like the OP figured out the problem...fuel pump relay.

Find the relay, check it out, replace if necessary. If that doesn't work...maybe someone else can chime in because I don't know lol.

 

[ShadowMKIII]

Aite I will try that and see...