MisterFubar
NAXJA Forum User
- Location
- Home
99XJ 4.0L AW4 96K
I was cruising along at about 70 and it bucked a couple times, backfired and lost all power. I put it in neutral as I was rolling to a stop and it died. I threw it in park and it fired right up and idled fine, so I continued on to where I was going. A couple hours later I was driving home and it did the same thing, I couldn't give it any gas without it stumbling and cutting out. I pulled over, let it sit(still running) for about 30 seconds and continued my drive home without any other problems. I was monitoring the TPS, Map, Timing, and Fuel flow with my Scangauge and nothing looked out of the ordinary when it was acting up. It didn't seem to have any problems until it was good and hot. On the trip home I had my fuel pressure gauge taped to the windshield and fuel pressure stayed at 50 +/-2 PSI. What the hell is wrong with this thing now?
A little history on it... A few weeks ago I had a bucking/surging problem under throttle that was fixed with an IAC.(the details of that can be found here http://www.naxja.org/forum/showthread.php?t=926165 ) A week ago I had some hesitation when it was first switching into closed loop mode that would sometimes throw a code P0135. That was fixed with an upstream 02 sensor(along with a header, a new cat, and a catback) It had been running fine all week during the same drive in basically the same conditions and I would like to think this is a new problem.
Work that's been done/parts that have been replaced.
Exhaust manifold replaced with header
New Cat
New up and downstream O2 Sensors
New IAC
New Cap/rotor/plugs/coil
New muffler and tailpipe
New Crank Position Sensor
Grounds Cleaned/replaced
Fuel injectors heat wrapped
Vacuum hoses checked, double checked and a few replaced.
I haven't done any troubleshooting yet on this problem with the exception of watching the scangauge and hooking up the fuel pressure gauge on my drive home.
I bought this thing hoping it would be a good Daily Driver and so far it's really been letting me down.
I was cruising along at about 70 and it bucked a couple times, backfired and lost all power. I put it in neutral as I was rolling to a stop and it died. I threw it in park and it fired right up and idled fine, so I continued on to where I was going. A couple hours later I was driving home and it did the same thing, I couldn't give it any gas without it stumbling and cutting out. I pulled over, let it sit(still running) for about 30 seconds and continued my drive home without any other problems. I was monitoring the TPS, Map, Timing, and Fuel flow with my Scangauge and nothing looked out of the ordinary when it was acting up. It didn't seem to have any problems until it was good and hot. On the trip home I had my fuel pressure gauge taped to the windshield and fuel pressure stayed at 50 +/-2 PSI. What the hell is wrong with this thing now?
A little history on it... A few weeks ago I had a bucking/surging problem under throttle that was fixed with an IAC.(the details of that can be found here http://www.naxja.org/forum/showthread.php?t=926165 ) A week ago I had some hesitation when it was first switching into closed loop mode that would sometimes throw a code P0135. That was fixed with an upstream 02 sensor(along with a header, a new cat, and a catback) It had been running fine all week during the same drive in basically the same conditions and I would like to think this is a new problem.
Work that's been done/parts that have been replaced.
Exhaust manifold replaced with header
New Cat
New up and downstream O2 Sensors
New IAC
New Cap/rotor/plugs/coil
New muffler and tailpipe
New Crank Position Sensor
Grounds Cleaned/replaced
Fuel injectors heat wrapped
Vacuum hoses checked, double checked and a few replaced.
I haven't done any troubleshooting yet on this problem with the exception of watching the scangauge and hooking up the fuel pressure gauge on my drive home.
I bought this thing hoping it would be a good Daily Driver and so far it's really been letting me down.