Rev limiter problem, A4.
Thread Starter
Pro
Joined: Dec 2005
Posts: 640
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From: Dow Illinois
Rev limiter problem, A4.
Ok I have a 98 with a 2800 Yank stall.
We are having Rev limiter problems, No matter where we set the limiter or shift point too, its hitting fuel cut at 6300.
Im not the tuner, but Im trying to help him find the answer. He is thinking its a possible TPS sensor either at the Throttle body, or under the pedal that is bad, thats causing it to go into a default mode.
Any ideas?
EDIT:
The tranny will shift whenever it’s programmed to.
The problem is the rev-limiter cutting fuel before the shift point can be reached.
We are having Rev limiter problems, No matter where we set the limiter or shift point too, its hitting fuel cut at 6300.
Im not the tuner, but Im trying to help him find the answer. He is thinking its a possible TPS sensor either at the Throttle body, or under the pedal that is bad, thats causing it to go into a default mode.
Any ideas?
EDIT:
The tranny will shift whenever it’s programmed to.
The problem is the rev-limiter cutting fuel before the shift point can be reached.
Last edited by Kolk1; Mar 28, 2006 at 12:32 PM.
Burning Brakes
Joined: Jun 2004
Posts: 994
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From: SCOTTSDALE AZ
St. Jude Donor '05
Originally Posted by Kolk1
Have you heard of anybody having this problem? 
Thread Starter
Pro
Joined: Dec 2005
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From: Dow Illinois
Thanks, he said at one point they had it all set up at 7500, and it was still shifting around 6300.
Right now, with my set up, shift recovery is a huge ordeal, and with it shifting low, its killing my NA 1/4 mile times.
Right now, with my set up, shift recovery is a huge ordeal, and with it shifting low, its killing my NA 1/4 mile times.
Race Director
Joined: Apr 2005
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
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I believe a tuner can change the shift points. This is not the same as raising the rev limiter. When you hit the rev limiter, this just cuts the fuel flow to protect the motor. It has nothing to do with the actual shift points. 
Burning Brakes
Joined: Aug 2003
Posts: 1,070
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From: MARRIOTTSVILLE MD
Originally Posted by Kolk1
Ok I have a 98 with a 2800 Yank stall. We are having Rev limiter problems, No matter where we set the limiter or shift point too, It doesnt actually change in where it actually shifts. We had it set at 7k, and it was still shifting at 6300 area.Im not the tuner, but Im trying to help him find the answer. He is thinking its a possible TPS sensor either at the Throttle body, or under the pedal that is bad, thats causing it to go into a default mode. Any ideas?
If not then it will shift too low ?
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Thread Starter
Pro
Joined: Dec 2005
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From: Dow Illinois
This is what Bo, my tuner just sent me, hes going to sign up later today, to explain better.
The codes showing are:
C1281 C $28 TCS
C1288 C $28 TCS
The shifting tables work fine, but the rev-limiters do not.
Rev limit was set to 7800 with the resume at 7700 and it still hit fuel cut at 6400.
The codes showing are:
C1281 C $28 TCS
C1288 C $28 TCS
The shifting tables work fine, but the rev-limiters do not.
Rev limit was set to 7800 with the resume at 7700 and it still hit fuel cut at 6400.
Thread Starter
Pro
Joined: Dec 2005
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From: Dow Illinois
This is his post on LS1tech, he cant get to this board at work...
http://www.ls1tech.com/forums/showthread.php?t=476182
http://www.ls1tech.com/forums/showthread.php?t=476182
Thread Starter
Pro
Joined: Dec 2005
Posts: 640
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From: Dow Illinois
I changed the first post, I explained the problem totally wrong, Its not a shift point problem, its a fuel cut problem.
The tranny will shift whenever it’s programmed to.
The problem is the rev-limiter cutting fuel before the shift point can be reached.
The tranny will shift whenever it’s programmed to.
The problem is the rev-limiter cutting fuel before the shift point can be reached.
5th Gear
Joined: Mar 2006
Posts: 5
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Originally Posted by muncie21
I posted this on tech also. May want to look at RPM vs. Gear under ETC controls. Probably a long shot as most I've seen are set at 9000. Some Z06's have 6600 for 5th though.
There's no table itemized by gear vs RPM except for the fuel cut-off table.
5th Gear
Joined: Mar 2006
Posts: 5
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Thank you. This is significant since my EFI-live doesn't show this one at all.
Two questions for you now.
Is this table for a 1998 C5?
Do you know exactly how this limiter is applied? (spark? fuel cut? ETC?)
Thank you!
Two questions for you now.
Is this table for a 1998 C5?
Do you know exactly how this limiter is applied? (spark? fuel cut? ETC?)
Thank you!
Originally Posted by muncie21
Here's the table, as it appears in HPT...
Melting Slicks
Joined: Mar 2005
Posts: 2,252
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From: NE OH
Originally Posted by white2001s10
Thank you. This is significant since my EFI-live doesn't show this one at all.
Two questions for you now.
Is this table for a 1998 C5?
Do you know exactly how this limiter is applied? (spark? fuel cut? ETC?)
Thank you!
Two questions for you now.
Is this table for a 1998 C5?
Do you know exactly how this limiter is applied? (spark? fuel cut? ETC?)
Thank you!