sirhk100
Explorer Addict
- Joined
- December 19, 2000
- Messages
- 1,776
- Reaction score
- 1
- City, State
- las vegas
- Year, Model & Trim Level
- '91
So, last week started stumbling on some problems.
'91, 4.0, manual trans, all stock.
Initial startup when cold has been fine. Last week I drove about 8 miles home from work so engine was up and running at full temp. All seemed great. I parked, ran inside a dry cleaner to grab a shirt and hopped back in. Couple minutes at the most. Crank it up and it sputters, pops, barely runs. Reminded me of when my fuel pump was going out less then a year ago. I shut it off and try again. Same thing, barely idles, running like absolute crap. Not running good enough to remotely drive. Finally it pops, sputters and dies. I hop out and pop the hood. Check for the usual vacuum plug that I loose on occasion. Check connections here and there. All good... WTF??? Hop back in and it fires right up like nothing is wrong.
I'm at a grocery store parking lot basically and need to run into the grocery store. Now that it's running I move it further out into the parking lot by itself so that in case it doesn't start I could walk home, get my van and car trailer and recover it much easier then where it's parked in the front row spot. I run into the store, come out 10 minutes later. Fires right up... All good.
Next morning, I hop in to head to work about 6:30AM. fires up perfect. Drive 8 miles or so to work and swing by the minimart around the corner to grab a soda before work. I'm in there maybe 2 minutes. Come back out, same thing, cranks up, sputters, pops, runs like absolute crap. I shut it off... Let it sit for about a minute, fires right up and runs perfectly!
That was early last week... Fast forward to yesterday at lunch. It's been sitting for 4 hours so good and cold. I head off to lunch and it fires right up. I drive it maybe 3 miles. Park, hop out, walk maybe 10' and decide I don't want to eat there. Hop back in, this time it just cranks and cranks and cranks. I give it 3 solid tries cranking probably a solid 5 seconds each time and it doesn't fire at all.
Screw it, guess I'm eating there... Walk in grab a bite, walk out maybe 10 minutes later and it fires right up. I drive back to work, shut if off for about 30 seconds and then try again. Fires right up.
Yesterday after work, again, drive home, pull in my drive. Let it sit about 15 seconds. Fires right up...
I did put a new fuel pump in it about 9 months ago. While it's new, it is just an autozone piece so won't rule that out. I also was not able to replace the fuel filter at that point. I had the tool to release the prongs but just had no luck and rather then damaging crap I just said screw it and left it. This weekend I'm going to get the filter replaced one way or another. I have no clue how old the filter on the expo currently is.
"If" I can get the darn thing to stumble in my driveway I'll check fuel pressure but so far it just threatens me when I'm not home... Fuel pump and filter are my first thoughts only cause it's running very similar to when the pump last was failing.
Any other ideas/thoughts though that I should look into?
'91, 4.0, manual trans, all stock.
Initial startup when cold has been fine. Last week I drove about 8 miles home from work so engine was up and running at full temp. All seemed great. I parked, ran inside a dry cleaner to grab a shirt and hopped back in. Couple minutes at the most. Crank it up and it sputters, pops, barely runs. Reminded me of when my fuel pump was going out less then a year ago. I shut it off and try again. Same thing, barely idles, running like absolute crap. Not running good enough to remotely drive. Finally it pops, sputters and dies. I hop out and pop the hood. Check for the usual vacuum plug that I loose on occasion. Check connections here and there. All good... WTF??? Hop back in and it fires right up like nothing is wrong.
I'm at a grocery store parking lot basically and need to run into the grocery store. Now that it's running I move it further out into the parking lot by itself so that in case it doesn't start I could walk home, get my van and car trailer and recover it much easier then where it's parked in the front row spot. I run into the store, come out 10 minutes later. Fires right up... All good.
Next morning, I hop in to head to work about 6:30AM. fires up perfect. Drive 8 miles or so to work and swing by the minimart around the corner to grab a soda before work. I'm in there maybe 2 minutes. Come back out, same thing, cranks up, sputters, pops, runs like absolute crap. I shut it off... Let it sit for about a minute, fires right up and runs perfectly!
That was early last week... Fast forward to yesterday at lunch. It's been sitting for 4 hours so good and cold. I head off to lunch and it fires right up. I drive it maybe 3 miles. Park, hop out, walk maybe 10' and decide I don't want to eat there. Hop back in, this time it just cranks and cranks and cranks. I give it 3 solid tries cranking probably a solid 5 seconds each time and it doesn't fire at all.
Screw it, guess I'm eating there... Walk in grab a bite, walk out maybe 10 minutes later and it fires right up. I drive back to work, shut if off for about 30 seconds and then try again. Fires right up.
Yesterday after work, again, drive home, pull in my drive. Let it sit about 15 seconds. Fires right up...
I did put a new fuel pump in it about 9 months ago. While it's new, it is just an autozone piece so won't rule that out. I also was not able to replace the fuel filter at that point. I had the tool to release the prongs but just had no luck and rather then damaging crap I just said screw it and left it. This weekend I'm going to get the filter replaced one way or another. I have no clue how old the filter on the expo currently is.
"If" I can get the darn thing to stumble in my driveway I'll check fuel pressure but so far it just threatens me when I'm not home... Fuel pump and filter are my first thoughts only cause it's running very similar to when the pump last was failing.
Any other ideas/thoughts though that I should look into?
