Running a Garrett 50trim turbo and daily driving it is fine and once I hit 6psi it falls flat on its face. No smoke out of the exhaust have done a compression test and it was fine. Replace PVC valve and it wasn't the issue...replaced cam sensor it was fine. Double checked timing, did a boost leak test, new spark plug wires and plugs...changed gaps from .20-.35 nothing help. A/F ratio is perfect....I need help...what's wrong guys! I want to drive my car and have fun!!

 

Are you able to log any pulls and see where you might be hitting the "brick wall" so to speak?

 

Can't log since we were reduing timing and now it's snowing

 

Sounds like it's a tuning issue.

 

The tuner is my buddy back in WA and he pulled all the tunes and re scaled to make sure it wasn't on his end and it still checked out. We are reduing the boost leak test this weekend as well

 

What boost controller and wastegate are you using? Check the lines and make sure they're hooked up properly. Also, check the tune to make sure the boost cut is set properly.

 

my car did that.. except i built full boost and didnt go anywhere like i was hitting the brakes.. my issue was my crank posistion sensor trigger plate was on backwards....... damn first time motor builds.. lol

 

Replace your maf . They can go bad and cause that issue you still have it on there.

 

Lol. Yeah I'm looking to check all avenues of approach on this one. If we figure it out I'll let you guys know. Thanks for the help so far

 

yeah easy to check, if you cant get your motor to go in time its probably on the wrong way.. haha or make it TDC with the crank pulley then look to see where trigger plate is at.

and also check your cam position sensor, like as in the little trigger plate, that its not 180 deg off, idk if it can cause that, but its something to check.

if its ether of them id clean and check maf, maybe your knock sensors loose and causing it to pull a bunch of timing. idk thats all the thing is checked when it happened to me