Ok so i just got home and it's hot over here...was in bumper to bumper traffic...I was merging onto a road and cars were coming so I had to get on it in 2nd..after that in traffic the car started idling lean from 15.7 - 16.8 all over...car drove fine but it was doing this...I get home and right away popped the hood and check fuel pressure with vacuum hose and without...also took a pic of what the pressure did when I shut the car off...dropped to 30 ish and stayed there...I'm also posting a video...


1st picture is with vacuum line on - right under 40psi
2nd picture is with vacuum hose off and my finger over it - needle between 40 and 50 psi
3rd picture is after shutting off the car - dropped to right on top of 30 and stayed there
4th picture shows how my vacuum lines are routed just in case there's something wrong

no I did not paint my nails in my 2nd pic that's my wife taking the pic while I hold the vacuum hose...lmk what you guys think...


https://www.evolutionm.net/forums/at...s-img_4021.jpg

https://www.evolutionm.net/forums/at...s-img_4024.jpg

https://www.evolutionm.net/forums/at...s-img_4026.jpg

https://www.evolutionm.net/forums/at...s-img_4025.jpg

 

try switching back to a stock FPR?

 

im on stock fpr...what you see there is an aem fuel rail with a gauge on it...

 

Running E85?

 

pump gas...using aem fuel rail with the gauge on it...walbro 255...everything else fuel related is stock......car is fbo on pump...

 

I asked about E85 since you said it was hot and I thought maybe sitting in traffic there could have been vapor in the line. Fuel pressure looks pretty normal to me. So, dunno.