Rev Limiter

[warp_6]

Has anyone had problems changing their rev limiter? I thought I had mine set at 7100 (I plan on shifting at 6800), but I hit the limiter at 6500. Thats where I had it set before. I was logging when this happend, and my shift light/tacho confirms 6500 (I know not to trust the factory Tacho).
General>engine>fuel control>fuel cutoff
RPM limits
P/N cutoff=7100
P/N resume=7099

Cutoff RPM vs Gear Normal
all set to 7100 resume set to 7099.
Am I missing something

[Cap'n B]

The simplest thing I can think of is you forget to save your changes

[warp_6]

Nope, still there. Plus I made the changes a while ago, and many flashes ago. I have been working on my VE table. I haven't wanted to get the revs up yet. 600 miles on the new cam, and clutch. Tonight was the first time I got on it. I was planning on shifting at 6500, then the limiter hit right before I was going to shift. For a second I though the engine was coming apart. I'll try to reflash again tomorrow, but I don't think that will do it

[EC_Tune]

log & tune...

[warp_6]

You want my log and tune?? I've never done that yet. Copy, paste won't work. It appears I need to up load to a third party first. I will work on that.

[EC_Tune]

Naah. Just click on "Go Advanced" then Mr. Paperclip is your friend... LOL

[warp_6]

That's what thats for.
Attachment 5847

Attachment 5848
Frame 4100.
There wasn't enough resolution to catch the limiter when it happend, (if it was the limiter. If it was mechanical I don't think I would still be driving it) 100% TPS w/injectors shutting down. Must have happened between frames.

[warp_6]

Ok here is some more info. I set my limiter to 3000, and resume to 2500. Flashed. Logged, shut down at 3000, on again at 2500. Reset limiter to 7100, resume 7099. Flashed wouldn't get above 6500 Maybe the PCM knows better than I, and I shouldn't be going beyond 6500. I'll tell you she shows no signs of wanting to stop though

[Bill@HPTuners]

your file is tunerlocked meaning nobody but you can open it.

[Bill@HPTuners]

as for your log, maybe im missing something, but it doesnt look like its cutting fuel or spark so it doesnt look like the rev limiter kicking in to me.

[warp_6]

Attachment 5859
Lets try this. I know you cant see it in the log. I don't know what else would shut me down though. It happens so fast. I just assumed it was between frames. Like I said if it was mechanical I don't think I would be still driving it. I think I will try to set the resume at 6k and see if when this happens if it will pick up right away, or fall to 6k and then pick up.

[EC_Tune]

Log the "current Gear" in the trans section. That will tell you everything.

[warp_6]

I will try that when I get a chance. I'm letting a friend use the MVPI right now.

[warp_6]

Ok I got to use my interface today. I will have it back full time on Monday. I logged "current gear". transmission>general>trans current gear. If I set it up right? It shows 1 all the time. Now I have a M6, and all the current gear limiters have been set to 7100.
I have 3 runs or test for this each time it shuts down at 6500. Feels like I'm hitting a wall ( I don't think it's valve float).
Fuel pressure is constant though out the run.
No drivability issues other than slight surging at low rpms in first (parking lots).
No abnormal noises.
Track was off durring all of these runs.
Here is the log from yesterday. At the 1050 frame is when is hit.
I was thinking it may be the injectors going "static" I'm at 90% duty cycle, but one of the tests I did in a no load state. 60% duty cycle I'll attach that one as well.

Now part of the problem is me. I'm having a hard time holding my foot in it when this happens to get good data. I will go back out on Monday and try it again. I have the resume set for 5500.For the life of me I don't know what would be sutting me down like this? I am running in SD no MAF?? Anyother sugestions
Attachment 5922

Attachment 5923

[Chris@HPTuners]

if you log 24 or less bytes in the table display you will get higher scanner resolution.

[warp_6]

Here's 2 more logs. The first I didn't have injector duty cycle or ms being logged I believe I am loosing spark for some reason. If you look at the scan at fram 571 you see it get rich thats when it started. I held my foot in it this time. It sure sounded and felt like a limiter. Before I saw the scan I thought for sure I would see the injectors shutting down. I fixed the table to log inj. duty cycle and ms. This time I was in 2nd frame 735. Shut down right when it went rich. Injectors staying on, loosing spark, gets rich makes sense but why? I think I may monitor power to the injectors, coils see if i'm loosing the power circuit from the PCM.
Attachment 5967

Attachment 5968

[EC_Tune]

Did you turn COT off? Looks like COT kicking in because the AFR goes really rich, but you weren't logging Commanded AFR so I don't know for sure.

[warp_6]

I set the COT values to 1.0. If I turn it off I get the "service engine soon" light on 1.0 let the PCM think it's still doing it's job and no light. But that was before I went No MAF so Now the light is on anyway, but yes COT is off. I am logging commanded Chart 3 line 4 green. I just re enabled MAF ( just in case) and monitored power to coil #2 Still cut out at 6500. No power loss to coils. Question. If the pcm decided to stop grounding the coils would that show up under the spark advance? IF not does HP have the ability too? I thought status bit Ignition coil control would, but now I think that may be a circuit check, not control.

[EC_Tune]

My bad...
Missed Commanded AFR way at the bottom (LOL). Looks like it's going plenty rich though. Probably makes it lay down pretty hard.

[warp_6]

Yep. I've got a friend that's taking a dyno class. He needs help with his home work (he needs to dyno some cars). Wendsday if all goes well he will dyno mine. If my curve start to drop off before 6500 problem solved, kinda. I wont need to go beyond 6500. I set my light for 6400. I'm gonna back burner this little situation for a while. I don't like bettin up on my car so much. Still this is a werd one It's probable something very easy that I'm over looking