- Joined
- August 1, 2008
- Messages
- 11,815
- Reaction score
- 2,206
- City, State
- MO MO
- Year, Model & Trim Level
- 94 & 95 XLT's
Could use some ideas on where to start and solving these issues.
Please keep in mind I am new to the 5.0L in these rigs, and have only dealt with Explorer 4.0L for the last 12 years. I need to learn the 5.0L, just like I did with the 4.0L .
Issues at hand are:
1) OD is stuck on at all times, and can't be turned off by the column switch. I have yet to see the OD/Off light on this rig since it has been returned.
2) 1st to 2nd is quick- 2nd to 3rd is very delayed- 3 to 4 is also very quick.
3) Passing kickdown happens at less than 1/4 throttle, and instantly drops 2 gears, and RPM's hit 4k almost every time.
4) It has had a P1309 code since return as well. Only sharing this here, in case it is related somehow. I do not know if the CMP was removed & reinstalled during the engine swap or not. I also do not know if it needs removed when the lower intake is removed or not, but it was for a new gasket.
First a backstory to set the stage.
The rig is a highly modified 95 Ex XLT 4wd.
It recently had an engine & trans swap, from OBDI 4.0 to OBDII 5.0. I did not do the swap, and hired someone out of state to perform this, as I didn't have the knowledge, patience, or time to perform the OBD conversion. I do know some stuff, not a complete newb, and can comprehend most, but with electrical, it's best to talk in simpleton terms.
The previous setup:
97 4.0L OHV. Only lower end was used, and everything else was the stock 95 components.
95 manual ECM w/engine harness repined for trans harness
M5R1 4wd trans with custom harness
Atlas II 4.3 Transfer case w/VSS signal output convertor
8.8 Rear-D35 CAD front, w/manual switched shift fork actuator (on/off/on)
ABS delete (light on in dash pod)
The swap setup from a 98 Mounty donor:
98 5.0L w/3 wire CMP
98 Auto ECM
98 engine & trans harness customized by installer. What was integrated to the 95's is unknown by me.
98 4r70w rebuilt trans
98 GEM & 98 shifter w/OD switch
98 dash cluster w/ABS bulb removed
Atlas II 4.3 T-case (VSS removed and plug installed)
8.8 rear with OSS/ABS sensor- D35 CAD front w/manual switched Shift fork ( Wired wrong, not presently working)
I asked the installer for a new wiring diagram showing what was done, so I can figure circuits in the future if ever needed. I only got a diagram for Aux items, but nothing for the engine/trans harness, so there is no help from them with this, and the reason I am asking for your help now.
I do own an SCT3 3015, and can use it if that helps any? I have yet to plug it in, as I was told not too, with a CEL on. I want to believe that is only for loading a tune. Can't I use it to see whats going on with the ECM as is? I'm also new to this tool as well, and might need guidance with procedures for something like this. (dang newbs)
Thanks for any insights, tips, knowledge, guidance, or advice in advance!
Gregg
Please keep in mind I am new to the 5.0L in these rigs, and have only dealt with Explorer 4.0L for the last 12 years. I need to learn the 5.0L, just like I did with the 4.0L .
Issues at hand are:
1) OD is stuck on at all times, and can't be turned off by the column switch. I have yet to see the OD/Off light on this rig since it has been returned.
2) 1st to 2nd is quick- 2nd to 3rd is very delayed- 3 to 4 is also very quick.
3) Passing kickdown happens at less than 1/4 throttle, and instantly drops 2 gears, and RPM's hit 4k almost every time.
4) It has had a P1309 code since return as well. Only sharing this here, in case it is related somehow. I do not know if the CMP was removed & reinstalled during the engine swap or not. I also do not know if it needs removed when the lower intake is removed or not, but it was for a new gasket.
First a backstory to set the stage.
The rig is a highly modified 95 Ex XLT 4wd.
It recently had an engine & trans swap, from OBDI 4.0 to OBDII 5.0. I did not do the swap, and hired someone out of state to perform this, as I didn't have the knowledge, patience, or time to perform the OBD conversion. I do know some stuff, not a complete newb, and can comprehend most, but with electrical, it's best to talk in simpleton terms.

The previous setup:
97 4.0L OHV. Only lower end was used, and everything else was the stock 95 components.
95 manual ECM w/engine harness repined for trans harness
M5R1 4wd trans with custom harness
Atlas II 4.3 Transfer case w/VSS signal output convertor
8.8 Rear-D35 CAD front, w/manual switched shift fork actuator (on/off/on)
ABS delete (light on in dash pod)
The swap setup from a 98 Mounty donor:
98 5.0L w/3 wire CMP
98 Auto ECM
98 engine & trans harness customized by installer. What was integrated to the 95's is unknown by me.
98 4r70w rebuilt trans
98 GEM & 98 shifter w/OD switch
98 dash cluster w/ABS bulb removed
Atlas II 4.3 T-case (VSS removed and plug installed)
8.8 rear with OSS/ABS sensor- D35 CAD front w/manual switched Shift fork ( Wired wrong, not presently working)
I asked the installer for a new wiring diagram showing what was done, so I can figure circuits in the future if ever needed. I only got a diagram for Aux items, but nothing for the engine/trans harness, so there is no help from them with this, and the reason I am asking for your help now.
I do own an SCT3 3015, and can use it if that helps any? I have yet to plug it in, as I was told not too, with a CEL on. I want to believe that is only for loading a tune. Can't I use it to see whats going on with the ECM as is? I'm also new to this tool as well, and might need guidance with procedures for something like this. (dang newbs)
Thanks for any insights, tips, knowledge, guidance, or advice in advance!
Gregg