Have a 2002 Trans Am and the old limiter was set at 6800rpm's and raised it to 7500rpm for the new cam.
After adjusting the limit table to 7500 it's still cutting off at the old limit of 6800... Is there another table I have to adjust somewhere? What would cause it not to change? All my other tuning changes have worked when loading them.
NOT REV LIMIT ISSUE
It's cutting spark up top and not sure why
Last edited by 455GTO; 03-28-2016 at 10:27 AM.
There are several rev limiters and speed limiters. Post a file so we can help you find where its stuck.
Jaime
here is his tune file
What version of HPT are you using? I ask this because I used 3.0 to modify a file downloaded with 2.24 and the tune didn't take. Had to pull the current tune in the vehicle and make my changes and it worked fine then.
1999 Camaro SS #1601
1998 Z28 M6 cam/heads/bolt ons/9"
We were using the 3.0 to edit but 2.24 for scanning.... All the fueling changes when loging are working but for some reason the limiter wont change...Originally Posted by JoshR
Last edited by 455GTO; 03-20-2016 at 03:06 PM.
that might be it actually cause i am using 3.0 to edit, but using 2.24 scanner. So whats the fix? do a read entire then flash it back in?
Why did you enable the ETC limit? Set it back to disabled (stock).
Russ Kemp
I tried that just for shits and giggles
Anyone have any insight if our problem can be fixed by doing a read entire with 3.0 and rewriting with 3.0?
Back on the dyno and again its cutting off at
6300-6600. Like a fuel cut is happening...
Last edited by 455GTO; 03-21-2016 at 09:37 PM.
In p/n it hits the commanded 7500 limiter but when driving it cuts off early.... Help!
Is it possible that the NGK plugs im running which are -9 non resistor cause this?
Last edited by 455GTO; 03-21-2016 at 10:08 PM.
I highly doubt it would be the plugs. There should be seperate limiters for P/N and Drive. Check around the A/C dropdown tab.
I am experiencing the same problem with a car I'm currently working with. 2000 Camaro Z28. Cannot get is over 6800rpm. Interested to hear if the problem had gotten resolved.
Well it looks like it may have been the spark plugs. I was running the NGK B9efs gapped way too high at .36 (nitrous motor) and it must have had some spark blow out. I threw in some Br7's gapped at .025 and was able to rev it out to 7000 before it started to pop again. However, we never tuned it over 6500 as we couldn't get it to rev that high so it could be a lean stumble up top... If anyone can take a look at the tune file posted above and offer some insight in my tune it would be appreciated...
This doesnt look to be a "rev limit" issue as its not cutting fuel... The injectors are still firing when the cutout happens. Its something related to spark
Another thought could be the dwell times of the coils... Anyone ever had an issue where they had to increase the dwell values?
Last edited by 455GTO; 03-28-2016 at 10:32 AM.
Interesting... Same issue as me... My tune file is posted above if you want to take a look.
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