FloridaNative516
New Member
- Joined
- January 5, 2008
- Messages
- 8
- Reaction score
- 0
- City, State
- Hobe Sound, Fl
- Year, Model & Trim Level
- 1998 Engine / Tranny
I am a new member and look forward to learning from this forum. I dont exactly have an Explorer, HOWEVER, I have an engine and tranny combination from a 1998 Explorer that I've converted into a smaller car.
I'm currently running the following:
302/V8 setup as a 1998 Ford Explorer.
80mm Ford Mass Air
65mm Acufab Throttle Body
Distributorless Ignition w/coil packs
19 pound injectors (tried 24 lb but fuel pressure too low at idle)
155 in tank fuel pump
Edelbrock Intake (Performer RPM)
Mild Wolverine Cam (assuming it's a Blue Racer WG1190)
ECM: EEC-V NRT1 short code with SCT Superchip installed
ECM Part No. F87F-12A650-AVB with Catch Code NRT1
Wiring Harness from Ryan at FordFuelInjection.
4R70W AT with 2800 Stall converter (tranny pin setup as 7-pin connector for 98 version)
8.8 Rear end
The problem I am having is during deceleration the computer appears to be going into a open loop / close loop condition creating an engine surging. This looping is continuous until you decel to about 30 mph and then it goes into close loop and runs smooth. Also noticed that the tranny shifts smoothly between the primary gears but dropped quickly into OD. Upon deceleration you can feel the car instantly jump out of OD into the next higher gear but as soon as you touch the gas pedal, it shifts back into OD.
The shop I'm working with is at a lost with this phonomena. At the dyno shop he checks the strategy of the ECM and it gives a 7-digit code of "RAAD4G8" and cross-referencing it comes back with a catch code of MCR2 (not NRT1) though the computer has a sticker with NRT1 code (another dilemma).
Anyone in the Explorer realm have any knowledge of this type of encounter?
Any help would be deeply appreciated.
Warm in Florida.
I'm currently running the following:
302/V8 setup as a 1998 Ford Explorer.
80mm Ford Mass Air
65mm Acufab Throttle Body
Distributorless Ignition w/coil packs
19 pound injectors (tried 24 lb but fuel pressure too low at idle)
155 in tank fuel pump
Edelbrock Intake (Performer RPM)
Mild Wolverine Cam (assuming it's a Blue Racer WG1190)
ECM: EEC-V NRT1 short code with SCT Superchip installed
ECM Part No. F87F-12A650-AVB with Catch Code NRT1
Wiring Harness from Ryan at FordFuelInjection.
4R70W AT with 2800 Stall converter (tranny pin setup as 7-pin connector for 98 version)
8.8 Rear end
The problem I am having is during deceleration the computer appears to be going into a open loop / close loop condition creating an engine surging. This looping is continuous until you decel to about 30 mph and then it goes into close loop and runs smooth. Also noticed that the tranny shifts smoothly between the primary gears but dropped quickly into OD. Upon deceleration you can feel the car instantly jump out of OD into the next higher gear but as soon as you touch the gas pedal, it shifts back into OD.
The shop I'm working with is at a lost with this phonomena. At the dyno shop he checks the strategy of the ECM and it gives a 7-digit code of "RAAD4G8" and cross-referencing it comes back with a catch code of MCR2 (not NRT1) though the computer has a sticker with NRT1 code (another dilemma).
Anyone in the Explorer realm have any knowledge of this type of encounter?
Any help would be deeply appreciated.
Warm in Florida.
