Starting problems...
#1
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Year: 1997
Model: Cherokee
Engine: 4.0
Starting problems...
Background-- 97 4.0 with 208k on the clock. New timing chain set, crank sensor, fresh tune up.
Problem-- Starts great cold, runs fine. Warms up and has slight miss. Shut it off and it will restart fine if started within about 5 minutes, longer than that and it has to sit for 20ish minutes before it will start again.
Also it pops code 1391 occasionally. I'm leaning towards distributor, but I dropped a new one of those in about 15k ago.
It's driving me crazy- any thoughts, or anyone run across this before?
Problem-- Starts great cold, runs fine. Warms up and has slight miss. Shut it off and it will restart fine if started within about 5 minutes, longer than that and it has to sit for 20ish minutes before it will start again.
Also it pops code 1391 occasionally. I'm leaning towards distributor, but I dropped a new one of those in about 15k ago.
It's driving me crazy- any thoughts, or anyone run across this before?
#3
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Year: 1997
Model: Cherokee
Engine: 4.0
Not heat soak, it turns over like a champ. I've run small block chevy's for years, so I'm a pro with heat soak. LOL
I should have clarified in the original post- it will turn over and crank just like normal, only it fails to start.
There's the sticker- it runs fine, then simply won't start, and then starts like normal after waiting. Reminds me of vaporlock on a carb....
I should have clarified in the original post- it will turn over and crank just like normal, only it fails to start.
There's the sticker- it runs fine, then simply won't start, and then starts like normal after waiting. Reminds me of vaporlock on a carb....
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
Background-- 97 4.0 with 208k on the clock. New timing chain set, crank sensor, fresh tune up.
Problem-- Starts great cold, runs fine. Warms up and has slight miss. Shut it off and it will restart fine if started within about 5 minutes, longer than that and it has to sit for 20ish minutes before it will start again.
Also it pops code 1391 occasionally. I'm leaning towards distributor, but I dropped a new one of those in about 15k ago.
It's driving me crazy- any thoughts, or anyone run across this before?
Problem-- Starts great cold, runs fine. Warms up and has slight miss. Shut it off and it will restart fine if started within about 5 minutes, longer than that and it has to sit for 20ish minutes before it will start again.
Also it pops code 1391 occasionally. I'm leaning towards distributor, but I dropped a new one of those in about 15k ago.
It's driving me crazy- any thoughts, or anyone run across this before?
I wouldn't rule out the ignition coil. Is it the original coil?
#5
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Year: 1997
Model: Cherokee
Engine: 4.0
Yes it is the original coil. I've never had a coil go bad, but then I can't remember running one over 200,000 miles.
May as well change it out this afternoon and give the harness a check while I'm there. I just had my rear defrost eff up from a chaffed wire.
May as well change it out this afternoon and give the harness a check while I'm there. I just had my rear defrost eff up from a chaffed wire.
#6
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Join Date: Jul 2012
Location: SD
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Year: 1998
Model: Cherokee
Engine: 4.0
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