Stephen@lethal
Well-Known Member
I would say drain the E85 and swap to the 93 tune just to see if indeed its not related to the fuel. If its still doing it on the 93 tune, its a fuel system issue most likely.
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Fuel pressure is the same is always was when it worked.Have you gone into Engineering Test Mode via the main dash cluster to see if there are any codes stored there? I’ve heard that even if a code is not present in a code reader (or via tuner software) there still could be codes seen in the Engineering mode.
You stated fuel pressure is “good” - but no numbers; do you know the actual fuel psi when cranking it over or powering it up?
Have you tried reflashing the same exact tune that you had loaded right before the non-start issue? I’m wondering if perhaps there was a glitch or issue during file transfer and the reflash was corrupted.
Are you able to tell if you’re getting any spark?
Yeah I was on E85R. I'll keep that in mindWhen you said you flashed the flex tune in because you want to go back to 93, were you on a E85r tune? Im assuming so and now that you are trying to flash the flex tune in its running off e10-ish setting because it hasnt learned the content. Flash the e85r tune back in drive it to the station, (youll be fine with 18 miles left, most of us go down to low single digits) then once you fill up with 93 flash the flex in.
Yeah so if you check your alch% i bet it states 0 or 10% mine always reverts to it, so its basically acting like its on its 93 tune, why it wont start. You could flash the e85r tune, get the engine warmed up then flash your flex tune in, but still going to be driving around on the calibration that thinks its 10% or so until it learns it. at that point youll already be at a gas station.Yeah I was on E85R. I'll keep that in mind
If you have the standard analog cluster, this procedure should be the same across all 2015-2019’s:Fuel pressure is the same is always was when it worked.
I'm getting spark as it turns over and fires up
I haven't reflashed the tune, I will be doing that first come this weekend
How do you enter engineering test mode?
I got my 2018 to work before. Here is how I did it:
Turn on the key but do not start the car. (press "Start button")
Put the display in the mode where it is blank.
Hold the "OK" key and start the car.
When the "Engineering Test Mode" shows up release the "OK" button.
Use the up/down arrows until the AFE Bias shows up.
Press the "OK" key and then use the up/down buttons to adjust the Bias.
When you have what you want then hit the "OK" button to save it and you're done.
That is what I remember. If it doesn't work, don't shoot me. I'm just the messenger.
Yep, I've had basically the same issues since Lund tuning it. They've been helpful but I've cleaned/replaced MAF and tested O2, switched tunes and sent like 20+ logs over the course of a year and we can't pinpoint anything. Car runs fine on 93, which is why I'm trying to get it back to 93 so I can get service done to it and...worst case consider selling it, probably not though.I'm having some of the same issues. FlexTune, '19 GT A10, PP car.
Short version:
- Send logs to tuner
- Tuner sends 93 tune
- Seems to run great, send more logs
- Tuner confirms things are as expected, sends FlexTune
- Car runs strong on E85 Flex, 11.1-11.4 AFRs, but constantly throwing a CEL, specifically a P2097, P2099 (rich condition Bank 1 and 2)
- Car occasionally craps out when cold, like from a stop, throttle, stop again, idles down to a stall
- Have done many Crank Relearns (using an X4, with current firmware)
Then after the car sat for a week, it was doing the exact same thing as the OP, states: chokes down and stops. I manage to kind of finesse the throttle to keep it running, after it was going, it ran fine, drove it 20 minutes, stopped, fired up as expected. Did it again a day later, same thing, kind of gave it throttle by tapping it till it cleared up and stayed running. Then after I drove it, did another crank relearn and now there's no starting issues, it's back to the CEL codes and stalling as described while till it's warmed up good and has been running for like 15 minutes.
So my current situation:
- Car starts fine
- If from a stop, you surge forward, then stop completely, car will idle down to not running, starts right back up
- The above behavior does not seem to be present once it's been running for 15+ minutes
I'm sitting at about 1/2 a tank of Gate E85/Flex (indicated on the pump as 55-83 ethanol). Now my tuner is saying to take it to the dealer, maybe an O2 issue, the car was running perfectly when I bought it at 4K miles, bone stock, mint, it seemed to run fine on the 93 tune, it started the bogging issue after about 7 days of running E.
I think at this point I may:
- Run out the current ethanol in the tank to as empty as I can
- Fill it with 93 octane
- Drive it for a bit, on the FlexTune, then flash back to stock, confirm clean operation, maybe try the 93 tune again
Well, I love the car, so I'm definitely keeping it, and honestly, I don't think there's anything wrong, I think it's tune/fuel/some-other-3rd-thing related, especially since mine is basically a new car.Yep, I've had basically the same issues since Lund tuning it. They've been helpful but I've cleaned/replaced MAF and tested O2, switched tunes and sent like 20+ logs over the course of a year and we can't pinpoint anything. Car runs fine on 93, which is why I'm trying to get it back to 93 so I can get service done to it and...worst case consider selling it, probably not though.