Lund E85 Race tune major issue

[cnycomp]

Im still looking for the major issue

Sponsored

 

[2qwk4ya]

The only Major issue is the OP not changing the thread title.

OP,
You need to understand this is a new platform for 2018. these cars have only been out a year. They have done a incredible job getting to this level this fast. There will be bumps in the road, Be patient and work with your tuner. It will get resolved.

Before long this will be perfected just like the 11-14,15-17 cars. We are so fortunate to have people with this much talent working on this platform.

 

[Diocletian]

The only Major issue is the OP not changing the thread title.

OP,
You need to understand this is a new platform for 2018. these cars have only been out a year. They have done a incredible job getting to this level this fast. There will be bumps in the road, Be patient and work with your tuner. It will get resolved.

Before long this will be perfected just like the 11-14,15-17 cars. We are so fortunate to have people with this much talent working on this platform.

Look, this ain’t my first rodeo here. And Lund has been great trying to help me as much as they can, but it seems every other day there’s a new roadblock.

I know cold starts will be rough on E85
I know there’s a possibility for a P0316/P0300 to be thrown upon start up...now anyway?

Now my car surging at idle? Honestly there’s quite a few 2018s that are Lund tuned, none of them have all the issues I seem to be having, there’s conflicting information even in THIS thread. Not to mention, Brandon, my tuner, is baffled as all the logs I’m giving him appear to look ok?

I got one more thing to try, hopefully that does something, but the compounding list of issues is concerning me.

Also, I cant change the thread title, I mentioned for a mod to change it.

 

[Diocletian]

Update: Disconnected battery for 30 min, then provided cold start log on Flex tune. Long term Fuel trims were lean on Flex tune, was told to switch to Race tune. Provided logs on race tune, was told fuel trims were ‘much better’. Car does perform a lot better but at least once after warm up, I will still receive the ‘surging’ issue while stopped in traffic.

Edit: To further explain the surging. It feels like the car wants to stall. The RPMs will drop to 500RPM and surge to 850RPM over and over again at idle while warmed up, only seems to happen like 75% of the time and only once per trip. Throwing the car into park or tapping the throttle stops it

 

[Burkey]

Update: Disconnected battery for 30 min, then provided cold start log on Flex tune. Long term Fuel trims were lean on Flex tune, was told to switch to Race tune. Provided logs on race tune, was told fuel trims were ‘much better’. Car does perform a lot better but at least once after warm up, I will still receive the ‘surging’ issue while stopped in traffic.

Did they have any insights as to why this is the case?

 

[Diocletian]

Did they have any insights as to why this is the case?

To quote them: "This looks far better then while on the flex tune! Seems we didnt let the car learn the ethanol content well enough but with the E85 tune we'll be set."

I will be following up with them today with more logs

 

[thehunterooo]

Sounds like it looked into too low of a % on the flex fuel tune then? Should be fine on the race tune though unless it is the fuel.

 

[Diocletian]

Sounds like it looked into too low of a % on the flex fuel tune then? Should be fine on the race tune though unless it is the fuel.

Well I fill up at the station in Clermont all the time so if that's the case did you experience a similar issue when you filled up there?

Car seems to be good after the battery reset and e85r change by request of the tuner

 

[thehunterooo]

Oh dang I didn't know that was you lol locations don't show up on mobile....

I have like 800 miles on that E85 so far and it has been 100% good. I started with the flex fuel and then went to the race tune maybe a day after since I don't plan on running 93 and if I have to for whatever reason I will just change to flex. After the first two times the car starts up normally on E85 as well I don't have any sort of hesitation on cold starts you wouldn't know it has 100% E85 in the tank. It must have been the % settling too low as they said. E85 takes more fuel so if it settles at too low a % then it will run lean as the car thinks it has less E85 then it actually does. At least that is how I understand it anyways. I think the race tunes assume a high ethanol % so the car never has to learn. We will have to meet up sometime

Sponsored