Okay I have an Evo 9, stock turbo, stock injectors, wally 255. Was tuned by Kevin D at Evolution earlier this year.

Also have a aem wideband and Aeromotive afpr.

It started out of nowhere while driving one sec it was fine, the next it wasnt. After I noticed It running bad, I chexk the fpr and it had dropped to about 30 psi at idle. I put in a new wally 255 and still the fuel pressure was low so I adjusted it witht the regulator and got it to run 43 at idle but it seems like I uad to adjust it down further than I should have to get it to read 43 (though I shouldnt have had to adjust it at all because it was just fine so it shoupd have still been at 43).

Its fine idling and cruising but at wot the wideband leans out to about 13 and increases to aproxx 15-16 the higher the rpm gets and it feels like there is no power but it is boosting fine.

I DID DO A BLT, found two SMALL leaks and fixed them withi no improvement.

Any suggestions or ways to test the injectors or fpr?

Thanks for your time in advance!

 

thats way to lean, i wouldnt be boosting soo much if i were you.

find a known working set of injectors and swap em out. do the same with the fpr, im assuming its aftermarket.

 

Fixed it. Was the Aeromotive fpr. I found my stock one and swapped it out and it runs great!