PDA

View Full Version : rev limiter


CWR
March 19th, 2007, 05:39 PM
I am having trouble finding where to change my rpm limit. I was wondering if anyone could explain to me? Also I am having some problems flashing my computer on my 1998 5.0, It always comes up some type of error. Im not real sure, I havn't had time to mess with it much.
GMPX
March 21st, 2007, 11:47 PM
Next time you try to flash can you please try to take closer note of the error, we should be able to assist once you do that.

Cheers,
Ross

P.S - What RPM are you trying to rev to?
CWR
April 27th, 2007, 09:14 PM
I haven't had time lately to use my efi live, but I flashed it again and had no problems. I am still wondering about the rev limiter?
joecar
April 28th, 2007, 06:47 AM
Try table B3303.
CWR
April 28th, 2007, 07:17 AM
B3303 doesn't exist on the 1998 5.0 "L31"
ScarabEpic22
April 28th, 2007, 07:50 AM
Can you post the tune file?
ChipsByAl
July 2nd, 2007, 02:12 PM
I noted an error in the Vortec PCM (98-00) OS: 16263425

B1200 Desired Idle Speeds have the In-Gear and In P/N tables reversed.

I could not find a Rev Limiter either.
Lextech
July 3rd, 2007, 03:26 AM
The 96-2000 Original Vortec Truck with the Black PCMs will not rev past 5800 RPM. Supposedly its upper limit is hard programmed into the PCM. Maybe that is why there is no table for it. (This is just speculation on my part)
That is one reason why I installed the 12200411 LS based PCM into my 98 twin turbo truck. The other reason is that EFILive has Custom Operating Systems for that PCM--Which I am now running!
ChipsByAl
July 3rd, 2007, 02:15 PM
The Rev limiter is in the calibration. The real limiter is the injector size. Either increased cubic inches or a big cam will be limited by fuel delivery, that might seem like a rev limiter.
Al
Lextech
July 4th, 2007, 12:45 AM
Hey Al,
I also have Tunercat ( I am NOT a Tuner ) I could not get my truck to go over 5800RPM No matter what I set the Fuel Cut vs RPM vs Gear. This was with a Ramjet intake and 24lb Ford inj. As soon as I installed the 0411 PCM with an Express Van calibration and raised the RPM limit it went to 6200 before I let out of it. I have seen this topic on 3 boards now and noone seems to have gotten the black PCM past 5800. I am NOT disputing you!
But there are a lot of guys trying it and can't seem to get higher than 5800.
With or without the RPM limit, I am Extremely pleased with the 0411 PCM.
ChipsByAl
July 4th, 2007, 12:58 AM
Maybe it is a V8 issue? The two that didn't seem to have problems are 4.3 V6
Al
wait4me
July 4th, 2007, 04:40 PM
There is no real rev limit table in the pcm. You can see that clearly in the scan tool. It is a side effect caused by SPARK Coil DWELL. NOT an issue with FUEL.

When i get time, i will try to put them in as soon as all the tables are found and then you can modify it to any limit under 8190. Just have a ton of other stuff going on right now so it might be a few weeks..