Running rough

Mike3

Member
Jul 26, 2025
19
9
13
Ohio
So about a month ago I finished up dropping a 5.0 from a 2000 explorer into my 94 gt. at first it would barely run and after seeing I had poor signal from the pip, I replaced the distributor and dropped it in and it ran better. But after many attempts to time it, it still runs like trash and won’t really idle and it’s making me think that something else is wrong with the car. I’ve checked grounds and plan on testing the injectors too. If there’s anything I should test or check. Thanks
 
This will help ID the issue(s) start at the beginning, read instructions, there are notes that apply to 94-5 models.
 
Code 15 - No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure). This can also be caused from an aftermarket chip to tune the ECU.

Code 32 - EGR Valve Position/Pressure Feedback EGR Voltage Below Closed Voltage. 0.24 volts (O,M,R)

Code 64 - ACT (Air Charge Temperature) signal low or grounded. Bad sensor, sensor wiring on pin 25 shorted to ground, or bad computer.

Code 75 - Brake On/Off (BOO) circuit closed/EEC processor input open (R)
I have not seen this one before and there appears to be little info on it. All I came up with is it can be used by the ECU to unlock/lock the torque converter.

Which ECU to you have and is the car a stick or auto? My immediate guess would be to chase down the Code 64.
 
Code 15 - No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure). This can also be caused from an aftermarket chip to tune the ECU.

Code 32 - EGR Valve Position/Pressure Feedback EGR Voltage Below Closed Voltage. 0.24 volts (O,M,R)

Code 64 - ACT (Air Charge Temperature) signal low or grounded. Bad sensor, sensor wiring on pin 25 shorted to ground, or bad computer.

Code 75 - Brake On/Off (BOO) circuit closed/EEC processor input open (R)
I have not seen this one before and there appears to be little info on it. All I came up with is it can be used by the ECU to unlock/lock the torque converter.

Which ECU to you have and is the car a stick or auto? My immediate guess would be to chase down the Code 64.
The cars a 5 speed and has the t4m0 in it. The abs module was unplugged when I pulled the codes, would that case the code 75 possibly?
 
ABS has nothing to do with the ECU. I know this because I installed an ABS system off a 95 into my 93.

Focus on the Code 64 and get that fixed. Clear the codes and then bring the car up to operating temp and rerun the codes.
 
ABS has nothing to do with the ECU. I know this because I installed an ABS system off a 95 into my 93.

Focus on the Code 64 and get that fixed. Clear the codes and then bring the car up to operating temp and rerun the codes.
Alright I’ll start going through the checklist for that in the morning, I appreciate the help
 
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