tayman
NAXJA Forum User
- Location
- Niceville, FL
Well the title pretty much explains it. 90xj 4.0L, ax-15.
Jeep starts fine, and runs. Power seems fine.
When cold, I'll roll down the block or so, then push the clutch in rapidly, and it'll try to die. Sometimes it succeeds. Starts right back up, runs fine, not usually an issue after that, as I'm careful to keep the idle up until it warms up.
Until recently, it ran just fine once it was warmed up.
Yesterday, it tried to die on me TWICE on a 30 mile drive. The first time was at highway speed. Doing about 70mph... 2700rpm or so. just kind of tried to give out. rpm's dropped sharply, I gave it more gas, had to sorta pump the throttle, and it caught back up. I made a quick stop at the pet store then went the rest of the way. Maybe two miles from the pet store, sitting at a stop light, it started bucking, sputtering, popping, like the distributor was 180* out of time. It was bad. I tried throttling it, it didn't do a thing. I ended up killing the engine. I restarted it, it idled at about 3K, but the light turned green, so I just rolled with it. Rpm's dropped back to normal-ish, and I finished the drive home.
Today, on my way to go 4-wheeling, it decided to straight up DIE in the McDonalds drive-thru. Engine was warm, and basically idling. I'd been goofing around lightly revving it, but nothing unusual, then just dead.
I'm kinda at a loss as to what it could be. It's not acting like a bad CPS, 'cause CPS would tend to just die and then not re-start for a while, am I wrong? I'm sort of thinking fuel pump or perhaps TPS?
Grounds, battery leads, charging cable wires, and so on have all been replaced about a week and a half ago. O2 is pretty new (but POSSIBLY bad), just cleaned the CPS, new MAP sensor...
Any help with this would be greatly appreciated, I'm pretty confused with it.
Jeep starts fine, and runs. Power seems fine.
When cold, I'll roll down the block or so, then push the clutch in rapidly, and it'll try to die. Sometimes it succeeds. Starts right back up, runs fine, not usually an issue after that, as I'm careful to keep the idle up until it warms up.
Until recently, it ran just fine once it was warmed up.
Yesterday, it tried to die on me TWICE on a 30 mile drive. The first time was at highway speed. Doing about 70mph... 2700rpm or so. just kind of tried to give out. rpm's dropped sharply, I gave it more gas, had to sorta pump the throttle, and it caught back up. I made a quick stop at the pet store then went the rest of the way. Maybe two miles from the pet store, sitting at a stop light, it started bucking, sputtering, popping, like the distributor was 180* out of time. It was bad. I tried throttling it, it didn't do a thing. I ended up killing the engine. I restarted it, it idled at about 3K, but the light turned green, so I just rolled with it. Rpm's dropped back to normal-ish, and I finished the drive home.
Today, on my way to go 4-wheeling, it decided to straight up DIE in the McDonalds drive-thru. Engine was warm, and basically idling. I'd been goofing around lightly revving it, but nothing unusual, then just dead.
I'm kinda at a loss as to what it could be. It's not acting like a bad CPS, 'cause CPS would tend to just die and then not re-start for a while, am I wrong? I'm sort of thinking fuel pump or perhaps TPS?
Grounds, battery leads, charging cable wires, and so on have all been replaced about a week and a half ago. O2 is pretty new (but POSSIBLY bad), just cleaned the CPS, new MAP sensor...
Any help with this would be greatly appreciated, I'm pretty confused with it.