Notices
Tuning, Diagnostics, Electronics, and Wiring HP Tuners | EFILive | Hand Held Programmers | Stand Alone PCM's | Electronics | Wiring Diagrams

Shift point v. fuel cutoff problems

Thread Tools
 
Search this Thread
 
Old 06-03-2007, 12:24 AM
  #1  
Destroyer of Transmissions
Thread Starter
iTrader: (28)
 
1SlowHoe's Avatar
 
Join Date: Feb 2005
Location: Orlando, FL
Posts: 4,962
Received 1 Like on 1 Post
Default Shift point v. fuel cutoff problems

I was doing some "testing" today but not logging. It seems as if everytime I go WOT (the 1-2 and the 2-3 shift) I hit the fuel cutoff. I think. The engine stutters and the battery light comes on the dash as if the engine died and then goes right back to
I have my shifts for all gears set to 6100rpm. The fuel cutoff is 6500rpm with a fuel re-enable of 6490.
Could I be running 400rpm over my shift point and bouncing off the fuel cutoff? What do you guys set your fuel cut offs at vs. your shift points.
Old 06-03-2007, 12:40 AM
  #2  
Launching!
 
Turbo-T's Avatar
 
Join Date: Mar 2006
Location: Bladenboro, N.C.
Posts: 212
Likes: 0
Received 0 Likes on 0 Posts
Default

you should not be going over 5950 due to map sencer and tp unless you can contol all the above this will cause it to lean out or the fuel filter restricks the flow that you need
Old 06-03-2007, 01:39 AM
  #3  
TECH Fanatic
iTrader: (5)
 
ridnlow's Avatar
 
Join Date: Sep 2003
Location: Mobile, AL
Posts: 1,074
Likes: 0
Received 0 Likes on 0 Posts
Default

I found something interesting with mine the other day.. I can set the shift rpm at 6100 but if i have mph at 45 and it takes more than 6100rpm to get to 45 it will go over it and hit the limiter.. might want to check your WOT shift speed.. I could be completely wrong but worth the shot
Old 06-03-2007, 01:44 AM
  #4  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by ridnlow
I found something interesting with mine the other day.. I can set the shift rpm at 6100 but if i have mph at 45 and it takes more than 6100rpm to get to 45 it will go over it and hit the limiter.. might want to check your WOT shift speed.. I could be completely wrong but worth the shot
right. the rpms have to match first, then the speed before it shifts.
Old 06-03-2007, 09:32 AM
  #5  
Mr. Obvious
iTrader: (4)
 
nightrunner's Avatar
 
Join Date: Jan 2006
Location: Manchester, TN
Posts: 6,006
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by Turbo-T
you should not be going over 5950 due to map sencer and tp unless you can contol all the above this will cause it to lean out or the fuel filter restricks the flow that you need
yes he can control EVERYTHING
Old 06-03-2007, 10:16 AM
  #6  
Destroyer of Transmissions
Thread Starter
iTrader: (28)
 
1SlowHoe's Avatar
 
Join Date: Feb 2005
Location: Orlando, FL
Posts: 4,962
Received 1 Like on 1 Post
Default

The 1-2 is set to 36mph the 2-3 is set to 67mph. I guess I need to lower those a bit? That way the speed will be met before I reach the rpm I want to shift at? What has primary control, the speed or the rpm? I think its the rpm from what I've seen.

I have 4.10 gears and 32" tires.

Last edited by 1SlowHoe; 06-14-2007 at 05:53 PM.
Old 06-03-2007, 10:36 AM
  #7  
TECH Fanatic
iTrader: (5)
 
ridnlow's Avatar
 
Join Date: Sep 2003
Location: Mobile, AL
Posts: 1,074
Likes: 0
Received 0 Likes on 0 Posts
Default

I thought primary control was rpm but like I said I can set my rpm at 6100 and mph at 45 and if by 6100rpm I am not at 45mph then it will keep revving until I get to 45mph...
Old 06-03-2007, 01:01 PM
  #8  
Banned
iTrader: (4)
 
litreddevil's Avatar
 
Join Date: Oct 2003
Location: From Houma La. Living n Ellisville Miss.
Posts: 5,151
Likes: 0
Received 1 Like on 1 Post
Default

whne under 100 throttle angle it goes off of the rpms shift points under part throttle it goes off mph
Old 06-03-2007, 03:24 PM
  #9  
Moderately Differentiated
iTrader: (4)
 
dewmanshu's Avatar
 
Join Date: Nov 2004
Location: Maryland
Posts: 27,563
Received 3 Likes on 3 Posts
Default

Even at WOT, if you have values in the WOT MPH Table BOTH (RPM & MPH) will have to be met to shift. Doesn't matter which is first, both have to be met. I zero'ed my MPH. Hell I zero'ed them a long time ago.
Old 06-03-2007, 04:37 PM
  #10  
TECH Fanatic
iTrader: (5)
 
ridnlow's Avatar
 
Join Date: Sep 2003
Location: Mobile, AL
Posts: 1,074
Likes: 0
Received 0 Likes on 0 Posts
Default

Dew, great idea.. when i get my truck back I am going to zero out the mph tables and see how that goes..


Quick Reply: Shift point v. fuel cutoff problems



All times are GMT -5. The time now is 04:14 AM.