just a regular walbro 255 and its a AEM FPR i also replaced it with a stock on that didnt make a diff.

 

---- IT its fixed=NO Boost

 

did you check the banjo fitting on the end of the fuel rail and make sure it has the right washer in it, or has a hole drilled in the rail... if not just drill a hold in it so the gas can flow.. i've had that happen 3 or 4 times.

 

Yep has correct washer/holes in the rail. The car just started doing this after i put 550's in, it was fine with 450's

 

walbro

 

eh i dont think so the first one was new, and the 2nd one worked fine in my buddys car

 

That is it you give up

 

did you try re-intsalling the 450's?

 

nope i sold them before i knew of this problem I dont see how injectors would make fuel pressure drop off in boost but who knows

 

The current injectors might not be 550's.

Seen it before. If the injector scaling is way off, you can tell.