blakews2217
NAXJA Forum User
- Location
- Alton, Illinois
2000, aw4,4.0 federal emissions.
I had ran my stroker too hard, wiped out s lifter and had oil pressure issues. Grabbed a 4.0 out of a 93 xj in the junk yard, swapped all the sensors to the obd2 and dropped it in. Ran ok for a few months, then a stumble If id get on it. Now ya gotten to the point I can’t drive it. Cold start, runs ok until it warms up, then, it’s like the timing is way way off. Push the pedal down and it doesn’t rev, doesn’t stall, just stays
It’s throwing many codes
Evan purge solenoid circuit open or shorted
TPS voltage low
O2 (rear) heater circuit
Transmission range sensor fault
Od solenoid a fault.
I’ve replaced the tps twice with house brand from advanced auto, with a meter it shows about .8 volts at idle and 4.8 at WOT
Swapped the map sensor with a known good one
The rear O2 is unplugged.
Sensor ground on ac compressor, battery ground on ac compressor, but different bolt
The front O2 is only about 2 years old.
I did a timing set and am rather sure the timing is dead on. But I’ll open it back up and check.
Here’s where things get wired, if I unplug the map sensor, it acts like cold startup, it’s drivable, but the difference is it wants to stall. If it’s plugged in, it will idle, but has no power. It doesn’t have much power to begin with but it’s undrivable with the map plugged in.
I’m stumped. Next part I’m going to try is the front O2.
As for the Evap, it’s hooked up, the wires are there, I tested the solenoid on 12 volts, it’s working, I passed emissions test (they scan for s cel) my adding a relay to give it full battery juice.
My last hope is my ecu, had a lose ground strap(from the head to the firewall) on the first start. Tightened it down and started it. Ran till now.
Sent from my iPhone using Tapatalk
I had ran my stroker too hard, wiped out s lifter and had oil pressure issues. Grabbed a 4.0 out of a 93 xj in the junk yard, swapped all the sensors to the obd2 and dropped it in. Ran ok for a few months, then a stumble If id get on it. Now ya gotten to the point I can’t drive it. Cold start, runs ok until it warms up, then, it’s like the timing is way way off. Push the pedal down and it doesn’t rev, doesn’t stall, just stays
It’s throwing many codes
Evan purge solenoid circuit open or shorted
TPS voltage low
O2 (rear) heater circuit
Transmission range sensor fault
Od solenoid a fault.
I’ve replaced the tps twice with house brand from advanced auto, with a meter it shows about .8 volts at idle and 4.8 at WOT
Swapped the map sensor with a known good one
The rear O2 is unplugged.
Sensor ground on ac compressor, battery ground on ac compressor, but different bolt
The front O2 is only about 2 years old.
I did a timing set and am rather sure the timing is dead on. But I’ll open it back up and check.
Here’s where things get wired, if I unplug the map sensor, it acts like cold startup, it’s drivable, but the difference is it wants to stall. If it’s plugged in, it will idle, but has no power. It doesn’t have much power to begin with but it’s undrivable with the map plugged in.
I’m stumped. Next part I’m going to try is the front O2.
As for the Evap, it’s hooked up, the wires are there, I tested the solenoid on 12 volts, it’s working, I passed emissions test (they scan for s cel) my adding a relay to give it full battery juice.
My last hope is my ecu, had a lose ground strap(from the head to the firewall) on the first start. Tightened it down and started it. Ran till now.
Sent from my iPhone using Tapatalk
