problem with boost
 

I just installed a DSP5 and EFI with a tune from a great vender. Now after 3 attempts, my boost will still go up and down like 5 to 7 psi at steady speed with slight surging felt in the seat of the pants, it doesn't do it while i'm acclecerating. Sometimes when I first get on it my boost will decrease with a decrease in performance and then a second later boost will pick up and it will go like hell. Has anyone else had the same problem?:humm:

maybe the tune, are you sure you dont have any loose hoses or anything

Is this on Cruise by chance? Mine did this on a old PPE tune and would surge almost at a steady speed. This was on a big tune.When I got the upgrade it was gone.

Yes it's at a steady speed with cruise control on. It's worst around 1700 - 2000 rpm. I have to record my data on efi while I'm driving send it to the company that built my tune. I used to run PPE on every level and never had this. Though I thought PPE ran too hot.

I would yes then its your tune.. And yes to the hot tunes lol.. I can pour all the water i want and still blast thro the EGT'S.. Twins and EFI for me too very soon...:tu: