Originally Posted by loiselle1987 (Post 2968434)

i'm filling up with e tonight and will see what happens. if it goes away i'll just run e.

i've heard it's bad for the car to not run 93 like once every 3 or 4 tanks, does anyone know if there's any truth to that?

Originally Posted by CSG Mike (Post 2968663)

E85 doesn't have detergents, so yes, you want to run pump gas every few tanks, or run Techron additive to keep your fueling system and valves clean.

I also recommend running OEM pulleys. Lighter =/= better. Damped pulleys are typically heavier than OEM, but race engine, particularly drag engines, use them. Just some food for thought.

Originally Posted by southside iraq (Post 2968431)

@VABeachBRZ I had the same problem when I ran a mix of 91 and e85 around e20 with the Ac on my car would stall when changing gears

Originally Posted by loiselle1987 (Post 2968706)

so you're saying the lightweight pulleys are not helping but hurting??

if it's causing the issues then understood, but i do like the better throttle response

and running e today was significantly better than pump, no stalling

Originally Posted by loiselle1987 (Post 3107991)

Yes, i stopped using Delicious Tuning and will never remote tune this car again.

A local guy in Atlanta was able to get it in one pass.

The port/direct injection transition was part of the issue - running great now, but now it's not flex - the Delicious Tuning flex fuel kit I bought doesn't work anymore.

Now it's 2 maps running E more than 93 and it runs like a beast - and the LW pulleys were never the problem

Originally Posted by Decimus (Post 3113554)

So this whole time your flexfuel kit failed and delicious never caught it via remote logs? I'm having intermittent fuel pressure drops around 2krpm while decelerating and im starting to believe its the flexfuel kit giving out

Originally Posted by CSG Mike (Post 3113575)

If it's fuel *pressure*, wouldn't you think it's one of the fuel pumps, which generates the pressure?

Originally Posted by CSG Mike (Post 3113575)

If it's fuel *pressure*, wouldn't you think it's one of the fuel pumps, which generates the pressure?

Originally Posted by Decimus (Post 3113667)

Could be the fuel pump, kinked fuel sock, fuel pressure regulator, flex fuel kit or something else. All i see right now are CEL lighting up on the dash and a ethanol content drop at around 2k rpm while decelerating. Doesnt effect track driving since im in the higher rpm but during stop and go traffic it can get annoying. Which fuel pump do you think it is?

Originally Posted by Grady (Post 3113686)

Had a similar issue with mine. Fuel pressure and E content not stable. Causing check engine light and other strange things. Turned out it was water ingress into the box. Just assumed since it was designed to be installed in an engine compartment it would have an water IP rating of 4 or so. Come to find out its rating is 0. Be carful where you mount it. They are starting to use a hydrophobic coating on board now to help. Changed my mounting position to the front of the fuse box with the wire harness pointing straight down. I just hope the box isnt already damaged beyond repair

Originally Posted by CSG Mike (Post 3113717)

That depends.

Are you logging the DI or PI fuel pressure?