Starting off,
Information on jeep Year 1993 (body) 1994 L6 4.0 engine, AX15 5 speed manual transmission I suspect is from the 93 body, suspect ECU is from 93 jeep (see later)
Model XJ base 4 door 4x4
Code 11 OBD1 (modules replaced CAM sensor and Crank position Sensor)
Symptoms and prior condition: Crank no start, Jeep was previously hard to start in the mornings [would crank but not run until battery light illuminated and turned off], power on and waiting 30 seconds usually remedied this. [Duration of these symptoms 2 years].
Summer 2023, destroyed clutch hydraulic line, so I serviced the transmission with a new slave cylinder and clutch kit. Since I was already down, new oil pan, rear main seal, and harmonic balancer seal replaced to fix oil leak, (now oil is only leaking from the valve cover...). While I was there I changed the oil pump. Spring of 2024 I changed the power steering pump to the WJ model which is much quieter.
Last fall (2024) my inspection plate was contacting the fly wheel upon shifting (post clutch change) this required removal of flywheel and reconditioning of the plate between motor and transmission. Upon the drive home with this noise the car died 40 feet from my house, coasted into driveway and proceeded to remove transmission and fix the plate. (it barely made contact)
Attempted repair/first start post transmission work. After assembly I forgot the CPS... We all know how fun that was to reinstall, but to my surprise no crank continued.
CPS was replaced, No start, So I bought a OBD1 scan tool (something I had put off for far too long). Code 11, missing signal from crank shaft position sensor or cam shaft position sensor.
Replaced distributor with new cam sensor. No start.
Upon looking up my symptoms a capacitor problem is known to exist for the ECU, Being into micro electronic repair, I replaced the three electrolytic 220 micro farad 25 V capacitors (upgraded to 35V (upgrading voltage is a good option as it lowers the stress on the capacitor, it has no electrical downsides other than cost/size)) and crank, no start, code 11. Upon removing some of the silicone sealant I found that the PCB was made in 1991 where the case which the silicone was poured was cast in January of 93, it might be a 94 but unsure.
I am looking for advice, (* I want to test the wiring harness (which is most certainly from the 93 frame), but I am not sure which signal wires to and from the ECU are on which pins, Specifically I hope someone knows where the 8V signal to the CPS and CAM come from, which ground they are supposed to use from the ECU as their reference, and most importantly which pins the return for CPS and CAM are supposed to be on) Without this knowledge I am unsure how to look for breaks or corrosion in the wiring harness.
Short of this I may have to test my luck buying a refurbished and programmed ECU off the web since MOPAR (according to my local dealer) has the ECU as a end of life product and neither can reprogram nor replace them. (I don't know if I believe the guy).
Information on jeep Year 1993 (body) 1994 L6 4.0 engine, AX15 5 speed manual transmission I suspect is from the 93 body, suspect ECU is from 93 jeep (see later)
Model XJ base 4 door 4x4
Code 11 OBD1 (modules replaced CAM sensor and Crank position Sensor)
Symptoms and prior condition: Crank no start, Jeep was previously hard to start in the mornings [would crank but not run until battery light illuminated and turned off], power on and waiting 30 seconds usually remedied this. [Duration of these symptoms 2 years].
Summer 2023, destroyed clutch hydraulic line, so I serviced the transmission with a new slave cylinder and clutch kit. Since I was already down, new oil pan, rear main seal, and harmonic balancer seal replaced to fix oil leak, (now oil is only leaking from the valve cover...). While I was there I changed the oil pump. Spring of 2024 I changed the power steering pump to the WJ model which is much quieter.
Last fall (2024) my inspection plate was contacting the fly wheel upon shifting (post clutch change) this required removal of flywheel and reconditioning of the plate between motor and transmission. Upon the drive home with this noise the car died 40 feet from my house, coasted into driveway and proceeded to remove transmission and fix the plate. (it barely made contact)
Attempted repair/first start post transmission work. After assembly I forgot the CPS... We all know how fun that was to reinstall, but to my surprise no crank continued.
CPS was replaced, No start, So I bought a OBD1 scan tool (something I had put off for far too long). Code 11, missing signal from crank shaft position sensor or cam shaft position sensor.
Replaced distributor with new cam sensor. No start.
Upon looking up my symptoms a capacitor problem is known to exist for the ECU, Being into micro electronic repair, I replaced the three electrolytic 220 micro farad 25 V capacitors (upgraded to 35V (upgrading voltage is a good option as it lowers the stress on the capacitor, it has no electrical downsides other than cost/size)) and crank, no start, code 11. Upon removing some of the silicone sealant I found that the PCB was made in 1991 where the case which the silicone was poured was cast in January of 93, it might be a 94 but unsure.
I am looking for advice, (* I want to test the wiring harness (which is most certainly from the 93 frame), but I am not sure which signal wires to and from the ECU are on which pins, Specifically I hope someone knows where the 8V signal to the CPS and CAM come from, which ground they are supposed to use from the ECU as their reference, and most importantly which pins the return for CPS and CAM are supposed to be on) Without this knowledge I am unsure how to look for breaks or corrosion in the wiring harness.
Short of this I may have to test my luck buying a refurbished and programmed ECU off the web since MOPAR (according to my local dealer) has the ECU as a end of life product and neither can reprogram nor replace them. (I don't know if I believe the guy).
