keep0njeepin0n
NAXJA Forum User
- Location
- Beaufort, SC
Ok, so on Sunday I was going down I-95, when all of a sudden without warning, my Jeep lost power, like if someone shut the key off, yet it was still running. When I tried to downshift to get the rpm's up and stepped on the gas, a little bit of black smoke came out like if it had too much fuel. I had to get towed home because it would not stay running. No CEL or anything.....
...Now I finally got it to stay running, and if I slowly open the throttle body it will rev up normally, if I do it anything other than really slow and steady, it starts bogging down. at idle if I step on the gas it almost immeadiately dies like it's choking out....there was a pending code for fuel system too lean bank 1, but now it's a current code with the CEL on after messing with it on and off for 2 days. I've also noticed that the exhaust gases are pretty hot feeling, and it's also blowing out little black carbon deposits on the ground.
About my XJ-- 99 with 4.0, Manual trans
Things I have ruled out for sure:
Spark plugs, wires, cap, rotor, fuel pump, cat. converter, vacuum lines, intake gasket, CPS, cam sensor, pickup module (in distributor)
Today when looking at the live data stream, everything appeared normal, excpet one thing really caught my eye...the O2 sensor upstream was a 0.25 volts while the downstream was at 2.5 volts...the PTFT % (whatever that is) of the upstream was a negative 17.4% while the downstream was like positve 20 something percent I think, but not negative for sure.
...Now I finally got it to stay running, and if I slowly open the throttle body it will rev up normally, if I do it anything other than really slow and steady, it starts bogging down. at idle if I step on the gas it almost immeadiately dies like it's choking out....there was a pending code for fuel system too lean bank 1, but now it's a current code with the CEL on after messing with it on and off for 2 days. I've also noticed that the exhaust gases are pretty hot feeling, and it's also blowing out little black carbon deposits on the ground.
About my XJ-- 99 with 4.0, Manual trans
Things I have ruled out for sure:
Spark plugs, wires, cap, rotor, fuel pump, cat. converter, vacuum lines, intake gasket, CPS, cam sensor, pickup module (in distributor)
Today when looking at the live data stream, everything appeared normal, excpet one thing really caught my eye...the O2 sensor upstream was a 0.25 volts while the downstream was at 2.5 volts...the PTFT % (whatever that is) of the upstream was a negative 17.4% while the downstream was like positve 20 something percent I think, but not negative for sure.