New e85 setup and missing mid range

[KevinHoward8509]

just got my car setup on E85. Thing ran great before and now on E85 it seems like its loading up mod range from 3500-5500 rpms. Tuner thinks it needs a set of plugs or may need the wide-bandd tuned anyone have any experience with this

['10CamaroDude]

IF you have the LFX engine, there is an E85 kit, there is not for the LLT.

I have run E85, and have had no issues in any RPM range, with or without a
tune, and with or without the aftermarket intake.

IF you are not tuned, you can't take advantage of E85. You will not need a better
pump, or bigger injectors running naturally aspirated.

Wide band o2 sensors will require a tune. They provide A:F ratios that are out
of parameters on stock ones. They can read as rich as 5:1 or as lean as 21:1.
Factory O2 sensors won't read higher than 15:1, or lower than 13:1, you don't have
much options.

Plug gap only needs changed under boost, lower gap.

As the plugs wear, the gap widens because the center electrode gets
shorter.

[Roader]

He doesn’t have a v6.

There is a lot missing from OPs post. We need more info. Did you just add flex fuel kit and that was it? No tune, what pump, injector size, data log, etc?

[KevinHoward8509]

Went with a fore innovations system. Regulator new rails new pump with dx1050 injectors. It was tuned as well and runs very strong but definitely has a solid miss sounds like its loading up to me. Did a new pulley at the same time as well and took it to 10psi. Car still made 680 wheel on E even with the miss. Tuner thought the plugs needed gapped so we did that and it still has the miss hes thinking since they are original plugs to start there since the car is 7 years old now but only has 5,000 miles on it. He mentioned tuning the wide band and that he thinks that is the next step if plugs dont clean it up.

[christianchevell]

if your not dyno tuned with hp..... your not tuned well and yes a wideband sensor should be sniffing the exhaust also.

[KevinHoward8509]

Originally Posted by christianchevell

if your not dyno tuned with hp..... your not tuned well and yes a wideband sensor should be sniffing the exhaust also.

It is dyno tuned. Just gotta get that mid to high range miss gone.

['10CamaroDude]

Originally Posted by Roader

He doesn’t have a v6.

There is a lot missing from OPs post. We need more info. Did you just add flex fuel kit and that was it? No tune, what pump, injector size, data log, etc?

He posted in the GENERAL Discussions, rather then a V8 section, so people
have to guess, and that's how you get WRONG answers. Not to mention, as
you said, lots of other missing data.

If you want WRONG answers, then be vague... Oh well...

[CamaroDreams76]

Originally Posted by '10CamaroDude

He posted in the GENERAL Discussions, rather then a V8 section, so people
have to guess, and that's how you get WRONG answers. Not to mention, as
you said, lots of other missing data.

If you want WRONG answers, then be vague... Oh well...

Valid point but there is no need to guess when his signature says "2014 SS 1LE summit white"

OP maybe you should try different plugs. Im no expert but shouldn't you be using at least a step colder? Most people run NGK TR6s or TR7s on that combo. Not sure what the AC Delco equivalent are called.

[Greenhornet2]

Simple things first for sure. Change the plugs. I'm not sure what you should be running with E I would be calling Jannetty with that question. might be worth doing a compression test while you are changing the plugs.

[KevinHoward8509]

Originally Posted by CamaroDreams76

Valid point but there is no need to guess when his signature says "2014 SS 1LE summit white"

OP maybe you should try different plugs. Im no expert but shouldn't you be using at least a step colder? Most people run NGK TR6s or TR7s on that combo. Not sure what the AC Delco equivalent are called.

i figured the signature would tell all the details as it is directly under but oh well.

From what i understand is the cylinder pressure has severally risen and the plugs have a more difficult time jumping spark so i am going to try new plugs as the ones in it are original but only have 4000 miles on them.

[gm2376]

Originally Posted by KevinHoward8509

i figured the signature would tell all the details as it is directly under but oh well.

From what i understand is the cylinder pressure has severally risen and the plugs have a more difficult time jumping spark so i am going to try new plugs as the ones in it are original but only have 4000 miles on them.

definitely go with some NGK plugs...who tuned it?

[silversleeper]

Could you edit your signature without the returns? It isn't visible. We can figure it out with a loooong sentence but not when it's invisible. E.g. Can't see if you have a DSX flex fuel sensor and e85 tune.


Without enough info I'd say you have a cracked plug and might be running lean if replacing the plug doesn't correct the air fuel.


No, e85 doesn't make it run worse if it's setup for it. I run e85 on boost.

[Badbubba]

What value is displayed on your wideband during wot, throughout the run? Can it be set for lambda? No model# shown for WB. Is the Fore a flex fuel system, or just a larger pump(s) with injectors and tuned for E. If a flex fuel sensor, can you read or log the E content? E85 can vary. If it is has a ff sensor, run the E85 out of the tank and fill up with a tank or 2 of 93 octane. It should read about E10 and run as well as it did before the Fore. If not, the tune is off. It should have been tuned on 93 octane gas, then E85 added to the tank and tuned for it. I would have installed a colder plug when you added boost originally. E85 uses about 30% more fuel. Unless the plugs are severely worn, I wouldn't believe the spark is not able to jump. Do you have a dyno sheet? Should have one showing the run on 93 and E85, along with the afr.

[KevinHoward8509]

i fixed my signature to read the major components. I added a fore innovations system on it with a new pulley as well as a flex fuel sensor.

i was thinking of going to a NGK TR6IX but hear mixed things on this. alot say go to a 7.

A company called force engineering did the install and the tune on the car.


Dyno sheet is attached as well.