[motivman]

Anyone ever experienced anything like this? I first noticed this issue on stage 2+ E30 tune, anything past E50, and my car will LITERALLY refuse to rev past 6.5K rpm (acts like it has hit redline). Same issue with OEM LPFP and Stage 2.5 LPFP. I flashed to Multimap stage 2+ E30, and was relieved that I could run E50 again, and hit 7k rpm again with no issues. Disappointment set in again on multimap stage 2+ E30, when I noticed, anything above E65, this ugly issue rears its head again. With E65-E75, the car wont rev past 6.5Krpm. With E76 in the tank, car wont rev past 6.2K rpm.. again acts like it hits redline, revs wont climb till I shift to the next gear. This is mostly accelerating in 3rd gear, then shifting to 4th gear.

Here are some logs on E48, really tested the car, multiple 60-130 runs, can hit redline at 7k rpm with no problem.

3rd gear to Redline

https://www.bootmod3.net/log?id=627f...0b437b05429cd8

3rd to 4th gear pull (60-130)

https://www.bootmod3.net/log?id=627f...90c61fd35b54f3

https://www.bootmod3.net/log?id=627f...729b30f439a976

Here with E67 in the tank.. car acts like I am hitting redline at only about 6.3K rpm.. RPM will refuse to increase after this point, till I shift to 4th gear…

https://www.bootmod3.net/log?id=627b...729b06174b53af

Here with E75 in the tank, same issue, RPM wont increase past 6.3k rpm, like I am hitting redline early…

https://www.bootmod3.net/log?id=627a...0b4376591593b2

Any help is appreciated. Cannot figure this out… Logs look fantastic, no HPFP crashes... NOT SURE WHAT is going on, Hopefully someone really smart can shed some light on what i might be missing. My hardware is below:

FBO, Pure stage 2, Dorch stage 2 HPFP, Eldor coilpacks, 97506 plugs at 0.022 gap.

Another important note... If I run E70 gas with Stage 2H E30 map, I can hit 7K rpm redline with no issues... SMH

[n55david]

Originally Posted by motivman

Anyone ever experienced anything like this? I first noticed this issue on stage 2+ E30 tune, anything past E50, and my car will LITERALLY refuse to rev past 6.5K rpm (acts like it has hit redline). Same issue with OEM LPFP and Stage 2.5 LPFP. I flashed to Multimap stage 2+ E30, and was relieved that I could run E50 again, and hit 7k rpm again with no issues. Disappointment set in again on multimap stage 2+ E30, when I noticed, anything above E65, this ugly issue rears its head again. With E65-E75, the car wont rev past 6.5Krpm. With E76 in the tank, car wont rev past 6.2K rpm.. again acts like it hits redline, revs wont climb till I shift to the next gear. This is mostly accelerating in 3rd gear, then shifting to 4th gear.

Here are some logs on E48, really tested the car, multiple 60-130 runs, can hit redline at 7k rpm with no problem.

3rd gear to Redline

https://www.bootmod3.net/log?id=627f0d14d10b437b05429cd8

3rd to 4th gear pull (60-130)

https://www.bootmod3.net/log?id=627f0da8c090c61fd35b54f3

https://www.bootmod3.net/log?id=627f0e35ae729b30f439a976

Here with E67 in the tank.. car acts like I am hitting redline at only about 6.3K rpm.. RPM will refuse to increase after this point, till I shift to 4th gear…

https://www.bootmod3.net/log?id=627bcd41ae729b06174b53af

Here with E75 in the tank, same issue, RPM wont increase past 6.3k rpm, like I am hitting redline early…

https://www.bootmod3.net/log?id=627aa509d10b4376591593b2

Any help is appreciated. Cannot figure this out… Logs [...]

You likely had a bad misfire which causes you to just let off like it hit the Rev limiter

[motivman]

Originally Posted by n55david

You likely had a bad misfire which causes you to just let off like it hit the Rev limiter

misfire but no codes?

[n55david]

Originally Posted by motivman

misfire but no codes?

I had a similar issue. It showed as a fuel issue though

[motivman]

Originally Posted by n55david

I had a similar issue. It showed as a fuel issue though

what was your fix? its obviously something to do with FUEL, because the more E85 I run, the more the issue is apparent.

[thejeremyman9]

Stock LPFP?

[n55david]

Originally Posted by motivman

what was your fix? its obviously something to do with FUEL, because the more E85 I run, the more the issue is apparent.

So.. when I was stock lpfp and was trying to run full e85. Just wouldn't happen. FP would just crash and it ass freak the fuck out.

Changed the lpfp to aftermarket and it stopped.

When I swapped turbo and tried to run e85 the same thing would happen.

[motivman]

Originally Posted by thejeremyman9

Stock LPFP?

I noticed the issue first with stock LPFP, switched over to my stage 2.5 Precision raceworks LPFP, and same issue.

[motivman]

Originally Posted by n55david

So.. when I was stock lpfp and was trying to run full e85. Just wouldn't happen. FP would just crash and it ass freak the fuck out.

Changed the lpfp to aftermarket and it stopped.

When I swapped turbo and tried to run e85 the same thing would happen.

Yeah, noticed this also after swapping to Pure stage 2 turbo. running stock LPFP or stage 2.5 LPFP makes no difference. Also, looking at logs, HPFP is not crashing... so maybe this is a PTF tune issue? so what are you doing to remedy this? just run E60 or less??

[n55david]

Originally Posted by motivman

Yeah, noticed this also after swapping to Pure stage 2 turbo. running stock LPFP or stage 2.5 LPFP makes no difference. Also, looking at logs, HPFP is not crashing... so maybe this is a PTF tune issue? so what are you doing to remedy this? just run E60 or less??

I haven't tested to see what the max is but yeah. E60ish has been fine.

[motivman]

Originally Posted by n55david

I haven't tested to see what the max is but yeah. E60ish has been fine.

my testing has showed:

Stage 2+ E30 Map: anything below E45, and the tune runs with no issues

Multimap Stage 2+ E30: Anything below E60, and the tune runs with no issues

Stage 2H E30: FULL E85 will run with no issues

[LA1Z24]

I get this issue if I make a large increase in ethanol, and then do not incrementally add power so the car can adapt to the ethanol content. If I add more E, and then go WOT, the car will break apart near the top. But if I spend 20 miles slowly doing more aggressive pulls, the issue never rears its head.

[motivman]

Originally Posted by LA1Z24

I get this issue if I make a large increase in ethanol, and then do not incrementally add power so the car can adapt to the ethanol content. If I add more E, and then go WOT, the car will break apart near the top. But if I spend 20 miles slowly doing more aggressive pulls, the issue never rears its head.

are you on hybrid turbo and aftermarket LPFP? what map are you running?

[LA1Z24]

Originally Posted by motivman

are you on hybrid turbo and aftermarket LPFP? what map are you running?

Dorch stage 2, Precision Raceworks stage 2.5 Stock turbo. Does it on E30+ map and MM e30+

[motivman]

Originally Posted by LA1Z24

Dorch stage 2, Precision Raceworks stage 2.5 Stock turbo. Does it on E30+ map and MM e30+

I only noticed this on pure stage 2 Turbo, can't recall having this issue on the stock turbo. are you auto or 6MT? this is looking more and more than a tune issue at this point.

[thejeremyman9]

I looked at the logs, but i cant really see the problem happening. It looks like as soon as the issue happens, you let off the throttle. In order to try and understand what is happening by looking at the logs, you would need to continue holding WOT after the issue happens. So even though it seems like the car stops accelerating, you would stay WOT to see if its closing throttle, pulling timing, etc. If you just immediately let off the log just looks like you let off at that RPM, doesnt show anything. Of course, you should do this at your own risk because we don't know what is actually happening when you say it seems like it is hitting limiter. You should also email PTF, but like i said, just based on the logs you sent, it looks like you just let off.

[motivman]

Originally Posted by thejeremyman9

I looked at the logs, but i cant really see the problem happening. It looks like as soon as the issue happens, you let off the throttle. In order to try and understand what is happening by looking at the logs, you would need to continue holding WOT after the issue happens. So even though it seems like the car stops accelerating, you would stay WOT to see if its closing throttle, pulling timing, etc. If you just immediately let off the log just looks like you let off at that RPM, doesnt show anything. Of course, you should do this at your own risk because we don't know what is actually happening when you say it seems like it is hitting limiter. You should also email PTF, but like i said, just based on the logs you sent, it looks like you just let off.

Ticket is open with PTF, they responded initially, asking for a log in 3rd gear to redline, which I have sent several ever since, but no response yet. I also try holding wot for like a second or two, when I feel the car acting like its hit redline, and RPM just bounces at that rpm, and refuses to go higher... not comfortable holding longer than that, but seems the logger isn't picking up anything interesting at the end. I also check for codes right away, and have never seen any code thrown for this, both in bootmod3 and in bimmerlink.

[thejeremyman9]

Originally Posted by motivman

Ticket is open with PTF, they responded initially, asking for a log in 3rd gear to redline, which I have sent several ever since, but no response yet. I also try holding wot for like a second or two, when I feel the car acting like its hit redline, and RPM just bounces at that rpm, and refuses to go higher... not comfortable holding longer than that, but seems the logger isn't picking up anything interesting at the end. I also check for codes right away, and have never seen any code thrown for this, both in bootmod3 and in bimmerlink.

Yeah the log doesnt seem to pickup this bouncing. It just looks like you let off, so unfortunately can't really see what might be happening.