Sup guys...i got a prob my car started breaking up badly after i bought gas...my initial thought was i bought a bad batch of e85 or maybe because i let me car sit for 3-4 weeks without starting it but thats not the case because i drained all the fuel blew out all the lines and bought e85 from a different station car still does the same thing i checked the fuel pressure was still at 40psi which was wat i dynoed at...i raised it to 50 psi and it cleared up on idle a/f kept jumping between 13.5-16(before literally sound like a sti) took it for a drive this am car has a miss but was still driving decent tried to boost the car started breaking up again looked at the a/f @ wot im seeing 12.1-12.5 then drops to 10.9 if i stay on the gas
The is ap1 103 on the motor oem coils ngk 2668 spark plugs, 2 aeromotive 340 pumps -8 feed -6 return, fbm sidewinder kit with gt35r boosting to 29lbs
Any help or suggestion in appreciated

 

im actually having the same current issue on my setup, im gonna datalog some stuff and see what i can find

 

Maybe your local E85 stations are the using the winter blend? Do you test the ethanol content before filling up?

 

The first station no...the second station i know is good because 2 other cars filled up from there and isnt doing what my car is doing

 

Coil problems? How many miles on the fuel pumps running e85? I seen a guy with a supra pull his pumps out and the e85 was eating or corroding the termials.

 

The winter blend will only cause things to go a bit richer. Not likely the problem here. Are you actualy missing on one cylinder or just running rough? Disable fuel on one cylinder at a time to find which one is missing. Once you find which one it is try swapping the coil to see if the problem moves. If it does not then try the injector. If the problem stays on the same cylinder and your injector/coil wiring is good then I would start checking compression.

 

I was having a similar problem about a week ago. Turned out to be 1 of the pnp clips for my Id1000s.

 

hows the plugs?

 

I dont think its a coil/spark problem because when the fuel pressure is raised it cleared up...the pumps been in the car a lil over 1k miles

I did that sunday night each cylinder did the same exact thing...im gonna pull the spark plugs today and see what i find

Gonna go check them in a few

 

Pulled the plugs