My car has a freshly done rebuild. I have a t 70 turbo, with 550 primary and 720 sec. My problem is that the car will build boost beautifuly, but as soon as I get to almost 10psi it sputters and doesnt move untill I let go of the acc. It happens every single time. First gear it only hits 5psi, second hits five then when the actual power pull begins and it shoots off it gets to abbout 8 or 9psi and then it sputters all over the place. I was thinking that it could be my ignition, like I need to get a cdi box, msd or jacobs or something along the lines. Could that be the problem or could it be something else..???

 

are you tuned?

That turbo sounds big for 550's and 720's??? maybe not at 10psi though.

 

Sounds like you are hitting fuel cut, do you have a fuel cut controller? or upgraded ECU?

 

no fuel cut, I am running the stock vert ecu for now. But everything runs right, and then right before the big pull, it cuts out and sputters all over the place. I think its ignition. I dunno, anymore ideas?

 

I heard that there was a weird hesitation issue using an NA ecu with a turbo setup, and it could not be avoided. Something to do with the pressure sensor that connects to the manifold (not the atmo-one in the ECU itself).

Any confirmation on this?

 

well I heard that I should use a TII pressure sensor, if I were to disconnect it should I have a problem ?