Windrider
NAXJA Forum User
- Location
- Mansfield, Texas
Due to some family issues resulting in a total lack of time (like not enough to hardly sleep) my XJ has sat for 3 months unloved and was just fired up today. But let's no go into all of that...
Here's what we have.
01XJ - 85K miles, not the crack prone block (331?)
Last used to pull a small duck hunting boat every weekend Nov 1st - Jan 12th.
Running like a top with absolute 0 problems. 75 miles each way. Pulled great in 4wd when needed.
Last filled with stabilized (with sta-bil) winter grade regular unleaded on Jan 18th.
Driven 9.2 miles after fill up to circulate fuel stabilizer throughout system before being parked.
Fired up today on what was left of the battery on the first try. Outside temperature was about 68 degrees. Alternator output appears OK, battery came back rapidly.
Immediate rough idle. Check engine light on shortly after start. Check engine occassionally blinked on acceleration below 10mph, no blinking check engine light after first 2 miles. No dents in cat and it didn't even take a light hit in any of the 'recent' trips, so I don't think it would have any reason to be clogged.
Hesitation under load initially below 2,000 rpm. Now (10 miles later) hesitation primarily under 1,500. Now a smooth idle at stop that settles into a rough idle @ 750rpm. The longer it idles the greater the possibility of hesitation. (I had to go to auto zone for the scan, I don't have a scanner...yet.) Only code revealed was a misfire on #4. No other codes detected.
No oil in coolant.
Oil looks fine.
Pulled #4 plug and gap was .035. Plug looks fine with no fowling and .035 is what I gapped it when it was installed.
Just a shade over 10K miles on plugs. The plugs are Champion 4412.
Compression numbers unknown.
I've got half a mind to fill it with injector cleaner and run it on the highway for a while to burn down the tank then top off with summer fuel and go again. However, this baby has 3 cats and it really scared me when the check engine started blinking. When it first got underway I though I may have heard a very small backfire into the manifold cat, but it could have been my clunky front suspension too. (I need to do a little work.)
Any suggestions?
Here's what we have.
01XJ - 85K miles, not the crack prone block (331?)
Last used to pull a small duck hunting boat every weekend Nov 1st - Jan 12th.
Running like a top with absolute 0 problems. 75 miles each way. Pulled great in 4wd when needed.
Last filled with stabilized (with sta-bil) winter grade regular unleaded on Jan 18th.
Driven 9.2 miles after fill up to circulate fuel stabilizer throughout system before being parked.
Fired up today on what was left of the battery on the first try. Outside temperature was about 68 degrees. Alternator output appears OK, battery came back rapidly.
Immediate rough idle. Check engine light on shortly after start. Check engine occassionally blinked on acceleration below 10mph, no blinking check engine light after first 2 miles. No dents in cat and it didn't even take a light hit in any of the 'recent' trips, so I don't think it would have any reason to be clogged.
Hesitation under load initially below 2,000 rpm. Now (10 miles later) hesitation primarily under 1,500. Now a smooth idle at stop that settles into a rough idle @ 750rpm. The longer it idles the greater the possibility of hesitation. (I had to go to auto zone for the scan, I don't have a scanner...yet.) Only code revealed was a misfire on #4. No other codes detected.
No oil in coolant.
Oil looks fine.
Pulled #4 plug and gap was .035. Plug looks fine with no fowling and .035 is what I gapped it when it was installed.
Just a shade over 10K miles on plugs. The plugs are Champion 4412.
Compression numbers unknown.
I've got half a mind to fill it with injector cleaner and run it on the highway for a while to burn down the tank then top off with summer fuel and go again. However, this baby has 3 cats and it really scared me when the check engine started blinking. When it first got underway I though I may have heard a very small backfire into the manifold cat, but it could have been my clunky front suspension too. (I need to do a little work.)
Any suggestions?