Help

[Stangman Don]

my 96 explorer 4.0L has had an intermiten issue that seems worse when the temp is milder or the truck is hot. It starts just runs rough bogs,backfires etc never smokes though. Sometimes it stalls and wont restart(if you walk away and leave it for 30min it will start up and run perfect). Sometimes when it wont start the power locks will keep locking and unlocking when you are trying to start it. I have done fuel pressure tests,vacuum tests,spark tests all came out good and put close to $600 in sensors tps,crank,o2,map,idle control,maf,coolant temp sensor,egr,mudule,wires,plugs, etc! I have cleaned every + & - contact on the truck as well and checked all relay/fuses/wires for corosion found nothing.
When it is running it runs perfect no issues. When it acts up once you get it running and go 2 truck lenghts it smooths right out and runs great till you shut it off for anywhere from 10min -45min if it sits longer than that it does not act up!

 

[bttlscrs00x]

What motor is in it?

 

[Stangman Don]

4.0l

 

[bttlscrs00x]

Did you check your ECM?

 

[Stangman Don]

have had the truck scanned several times and nothing shows up as being wrong. Even the ford dealer is totally confused! I am ready to burn the hunk of junk! Have more into the new parts alone than the truck will ever be worth

 

[bttlscrs00x]

The reason I asked is because my truck had a rough idle and wasn't running properly. Turned out the ECM was caked with mud, wasn't throwing codes.

 

[Stangman Don]

truck has never been off road. It runns great for hours and hours just intermitenly acts up when you start it. smooths out imediatly after you start driving. I have a frod dealership in my backyard and they have suggested all the parts I have already replaced but other than that they are baffled. They say if it was the ECM it would act up all the time and would not smooth right out once you start driving it

 

[bttlscrs00x]

Hey, I was just offering something for you to check. It could be full of dust/dirt from being 15 years old. It's cheap and easy to do, but if you don't want to. That's fine.

 

[Stangman Don]

I have checked that when I was checking all the conections,fuses,relays under the hood. It is clean

 

[Daven]

Sludgy fuel maybe?

 

[Stangman Don]

it has been doing this for 1 year off and on. have flushed the fuel system always get gas at the same place and have run it in all my vehicles . no problems with the other vehicles just this one