SanDiegoOverland
NAXJA Forum User
- Location
- San Diego
I wasn't able to drive it today, though it did get me from where I noticed the issue, back home, (about 2-3 miles) without issue. :scottm:
Specs: 1992 XJ 4.0L, AW4, 204,000 miles, np231
Here's the symptoms:
-Long crank (about 15-20 cranks)
-Responds to "poor mans prime" by firing after about 2 or 3 cranks. I had already suspected a possible disfunction of the fuel pressure regulator/pressure valve at the fuel rail prior today's new symptoms.
-No check engine light
-No codes (i checked - OBDI)
New today
-from stand-still to about 2000rpm, nothing to report
-From 2000 and up, it acts like there is power. will not accelerate. VERY consistant.
-Whilst accelerating once, it popped a bit out of the tailpipe. not a loud backfire, just pops.
Recent repairs
-Cap, rotor, plugs,wires all marked and replaced using tape and photo's. I'm 99.9%-100% sure everything went on exactly as it came off, as far as the distributor, rotor, cap and wires are concerned.
-Add to that, the fact that it has been running top notch other than the long crank, for the last 5 days since the tune-up.
My main thought is the fuel pump, which would probably explain the long crank, or possibly the fuel pressure regulator at the fuel rail, but I don't know if that would cause the "limp mode" feel that the motor has.
I changed the fuel filter with the tuneup on saturday, but it's been running fine for a week, so I doubt that it's gone clogged. (You never know, but it's not my first thought, as the truck literally will sit and idle like nothing's wrong)
Specs: 1992 XJ 4.0L, AW4, 204,000 miles, np231
Here's the symptoms:
-Long crank (about 15-20 cranks)
-Responds to "poor mans prime" by firing after about 2 or 3 cranks. I had already suspected a possible disfunction of the fuel pressure regulator/pressure valve at the fuel rail prior today's new symptoms.
-No check engine light
-No codes (i checked - OBDI)
New today
-from stand-still to about 2000rpm, nothing to report
-From 2000 and up, it acts like there is power. will not accelerate. VERY consistant.
-Whilst accelerating once, it popped a bit out of the tailpipe. not a loud backfire, just pops.
Recent repairs
-Cap, rotor, plugs,wires all marked and replaced using tape and photo's. I'm 99.9%-100% sure everything went on exactly as it came off, as far as the distributor, rotor, cap and wires are concerned.
-Add to that, the fact that it has been running top notch other than the long crank, for the last 5 days since the tune-up.
My main thought is the fuel pump, which would probably explain the long crank, or possibly the fuel pressure regulator at the fuel rail, but I don't know if that would cause the "limp mode" feel that the motor has.
I changed the fuel filter with the tuneup on saturday, but it's been running fine for a week, so I doubt that it's gone clogged. (You never know, but it's not my first thought, as the truck literally will sit and idle like nothing's wrong)
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