Help please!!!!!!! Lund Flex Fuel e85 issue

[AJ5.0]

Hey guys just got my Lund ngauge and flex fuel tune and I installed it with a jlt intake. Loaded tune and fired her up with about 3/4 tank of 93 and just drove it till empty. Put e85 in and was fine till the first cold start. When I start the car the revs go up to 1500 and then shoot down to 200-400 where they are super jumpy with a rough idle. It has gotten so bad that the car actually turns off at red lights if I'm not feathering the gas. Is this normal what is wrong? Thanks so much

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[Higgs Boson]

check your intake install. make sure the maf isn't upside down.

make sure the tune accommodates for the jlt.

 

[Need4Speed15]

So it drove fine after the install on 93 for the 3/4 of a tank, then you put E85 in and it was fine until the first cold start then your problem happened?

If that's the case I'm sure your tune is for the JLT or it wouldn't have ran right from the start. What is the name of the tune file Lund sent you? Does it say flexfuel?

Check the install of the JLT for vacuum leaks or if the MAF wiring somehow came off?

 

[zaquhree]

Cold starts on e85 can be rough, log the start and stumble to capture your issue if you can and send in a ticket

 

[GSLSE20B]

Check the JLT connection to the throttle body . Mine came loose after a few weeks when it was new

 

[bonomo53]

Are you monitoring fuel learn on the ngauge? I've had the same thing happen to me a few times where the car will turn off when backing up after a cold start. Since i opened a ticket with lund and tried to datalog it hasn't happened again. What % is the e85?

 

[AJ5.0]

I will keep an eye on it, can any of you guys tell me what gauges I should be looking at on my ngauge to make sure everything is working correctly?

 

[AJ5.0]

Alcohol content is at 67%

 

[GSLSE20B]

I will keep an eye on it, can any of you guys tell me what gauges I should be looking at on my ngauge to make sure everything is working correctly?

For your issue : maflb/m ,afr, stft

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