4+3 issue
Thread Starter
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
4+3 issue
Ran 4+3 with kick down disabled for years. Worked well. OD cable is tie wrapped and on firewall. I engage with the dash lever as needed.
Converted from TBI to port fuel(1984 CF) this summer. Day one of conversion OD does not engage. No light engages on dash for OD.
I am using EBL/LT4.bin with all OD/TCC changes in bin done upon suggestion of EBL ECU MFG.
My GM certified mechanic jumpered relay and powered the OD and it works fine. Found OD unit low on fluid and refilled.
I ran car for a month with no OD available. Now I find OD engages with hard acceleration and when I let up throttle it leaves OD. Weird? Only in 2nd and 3rd gear.
Comments please...
Converted from TBI to port fuel(1984 CF) this summer. Day one of conversion OD does not engage. No light engages on dash for OD.
I am using EBL/LT4.bin with all OD/TCC changes in bin done upon suggestion of EBL ECU MFG.
My GM certified mechanic jumpered relay and powered the OD and it works fine. Found OD unit low on fluid and refilled.
I ran car for a month with no OD available. Now I find OD engages with hard acceleration and when I let up throttle it leaves OD. Weird? Only in 2nd and 3rd gear.
Comments please...
Melting Slicks
Joined: Jan 2014
Posts: 2,183
Likes: 381
From: Lunenburg MA
That's not a kick down cable. It adjusts the pressure in the OD unit based on throttle position. When was the fluid and filter last changed? They are very sensitive to poor maintenance which is recommended every 10K. If it was my car, I'd change the fluid and filter, reconnect the throttle cable and hope it works.
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
What dash lever? I've never seen one.
Usually,. that means no electrical signal to the unit. Not being a programmer, I think you may have some bad coding.
It may be easiest to do the common mod and bypass the ECM's switching it on/off, in favor of just the O/D switch.
Usually,. that means no electrical signal to the unit. Not being a programmer, I think you may have some bad coding.
It may be easiest to do the common mod and bypass the ECM's switching it on/off, in favor of just the O/D switch.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Either disconnect the tan / blk wire to the ECM and run it to ground through a new switch
or wire the 1st gear switch on the trans side cover direct to the O/d solenoid and use the existing O/d switch to ground the tan / blk.
Full man control
Last edited by rodj; Sep 19, 2015 at 01:14 AM.
