JRSC E85 Delicious Issue
 

Wanting to see if anyone else has had this issue:

I've been working with the Delicious trying to get this resolved, but I want to slam my head in the wall at this point.

We've gone through a ton of revisions and alterations, but my FRS stalls (MT) when decelerating - as in downshifting coming to a red light and pressing the clutch in.

I've ensured the MAF housing is seated right and there isn't a boost leak anywhere. Also, it doesn't launch properly, sometimes stalling out there too - bogs down; and the power isn't there like it used to have.

Has anyone else run into anything like this?

JRSC C38
Jackson radiator/oil cooler
Delicious E85 kit and custom tune
Clutchmasters fx400 clutch and flywheel kit
DW fuel pump and injectors (came with delicious e85)

it's a 2016 with about 12k miles on it, spirited driving, but nothing too intense.

It sounds like a car specific problem. Have you asked your installer for assistance on the mechanical end?

I had an issue where the honeycomb piece in the MAF housing came loose and would ride against the MAF causing a variety of weird running. Then had a cat do pretty much the same thing.very bad running on that one.

I did the install myself and had it checked out by a performance shop, everything is good, the header is catless but the honeycomb could be an issue. i may order a new one if i can find it.

other than little stuff like that, we're out of ideas..

Have it checked out by someone who is intimately familiar with the JRSC for this car. Otherwise, the shop can only really do what you're doing and what DT can do remotely with logs.

How is the idle? rich smelling, rough??? I had a car do that one time, found a blade of grass stuck in the maf sensor.

If everything is correct under the hood, could it possibly be the clutch? You would probably smell burning clutch if it was wrong but maybe the pedal is adjusted to low or the clutch is not installed correctly and not fully disengaging.

Have you tried since you have the e85 kit to run 93 and see if the issue changes at all as your map scales fueling for the different fuel? If it runs fine on 93 but has issues on e85 its likely tune related. If the fuel type does not change it then its likely something mechanically wrong.

*Disclaimer- I do not have a JRSC kit this is just an experience I had with a wrx I used to own.*

Definitely sounds tune related.

Why do you think its tune related, They have tuned other Jackson kits on E85 with no problem. Just curious on your thought process not trying to be a jerk or anything.

Probable a silly question, but are you sure you are actually getting E85 from station you are buying from? I don't run E85 but several cars that I have seen that do have put in a sensor because it can vary so much from station to station.

the e85 station carries good enough fuel. 80% content according to my readings.

the clutch was installed properly and is fine.

i've been running 93 in it for a couple weeks to see if there was any change, and it's exactly the same.

i just cleaned the MAF sensor with cleaner.

it's running perfect other than the stalling issue, no roughness, engaging fine, power is there.. even on 93.

i emailed jackson and they said the pulleys and lightened clutch could be causing the stalling since the response time so much quicker.

so far as what i've heard back from people and them it appears to be a tune issue.

at this point i'm ready to get a new car

I have a very similar issue. I emailed DT and they ask for logs from a cold start and idle for 15 mins.

Mine stalls a lot when shifting from X gear to neutral. But only when running 93. But when I’m running straight e85 I have zero issues.

@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

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?

Mine will stall when coming to a stop about the first 4 or 5 stops when I go from e85 to 91. I haven't talked to Delicious about it. I figured it is learning the new fuel. It goes away after that first 4 or 5 stops, then is fine. Does not happen when I go from 91 to e85.

I have a very similar setup as OP with C30 tuned by Bill of Delicious.


Please keep us posted.

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.

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

Yeah any mix, it goes crazy. But now I’m running straight 93 and it’s good as new. Same with 85....

Correct.

I don't think throttle response is an issue with your setup.

Is this figured out?

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

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

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

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?

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.

That depends.

Are you logging the DI or PI fuel pressure?

I remember your suggestion, i have since switched to a nonvented hood and moved the dbox. I’ll relocate once more further away from anywhere that might see moisture to see if it helps. Thanks again.

I will log again and see if this is the issue. I have the MK1+ upgrade and i see a drop in ethanol content in the app everytime im at 2k. Besides this, Delicious has been super helpful in pinpointing any issues ive had.

If you're logging in Ecutek, that's HPFP/DI pressure.