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DREADED C.EL. or check engine has retired for now, no more problems pop is gone, runs like a new truck, lol now on to gas gauge intermittin problems & maybe anew UnCracked fans

Ebay.com $40,

update ecm swap proved to solve issues, i still have a hint of low noise popping in the exhaust at times

Installing BackUp Ecm in morning after codes are run again

Update : Rough idle UDATE[/U] PSI 34-36 KOEO PSI 28-30 VAC ON AT IDLE PSI 38-40 VAC OFF AT IDLE PSI 36 HOLD 5 MINUTE PSI 28-30 RUNS ROUGH, THEN REMOVE FUEL PUMP RELAY PRESSURE DROPS SORTA SLOW AND BEGINS TO RUN NORMAL UNTIL IT HITS (ZERO) [U]OLDPOST 93 xlt 4.0 rough idle issues...

yes with key one ~check is on~ my reader brings nothing up, after running systems tests:roll:

93 xlt Truck starts up and runs rough,warm or cold doesnt matter truck runs like new 2-5 seconds After (FPR)= fuel pump relay is REMOVED, which then it Stops loading up on Gas and idles fine F-pressure tested Normal NO Codes, Cel Does Work Parts Replaced or Tested New FPR, New...

NO its good btw: thanks Everyone for the replies, been brain storming this 4 sometime

when fpr is removed it continues to run until pressure drops, Pump Does Not continue to run . will at issue over weekend, i plan on tracking some wire via manual

1)no 2)yes 3)yes 4)no

my scanner comes back with nodda, and jumper method also

1) correct 2)correct Fp ) i will see cel) no codes what so ever, cel does come on when it runs rough thats it

93 xlt Truck starts up and runs rough,warm or cold doesnt matter truck runs like new 2-5 seconds After (FPR)= fuel pump relay is REMOVED, which then it Stops loading up on Gas and idles fine F-pressure tested Normal NO Codes, Cel Does Work Parts Replaced or Tested New FPR...

track the ground connection wire, test wires 4 current,, mine does the same thing works when it wants to, but i base my gas fill by miles driven give or take 20miles... 0 to 100-150 miles be4 refilling

already done this, the issue is still there ps: Thanks to Everyone for input

try to do the trans line & cooler flush with actual flush, not just flush with trans fliud

you'll just have more mixed fluid, but the great thing about today is they make trans fliud more durable, high miles,heat is a thing of the past, but your internal componets still take a beating

would it be a running flush?..by the time ur done, you would be better off having the shop do it, SOMEONE/PLACE YOU TRUST you want to get all the gunk out of the trans clutch packs ,tq,drums.:salute:

people drive piles of crap everyday, and still wish they didnt have problems, some piles of crap have no issues or problems, and people have them crushed

scanner/ tests 100% & within specs, this whole thing is like a virus becus 1 thing being bad can cause multiple problems in the system

F pressure within specs, tested when running fine and running bad, tested upto 3000rpm

and it says its 30f outside right now, im north of you

you are correct,

hello everyone, i have 25 yrs + of knowledge of cars, trucks, racecars etc. minus memory loss my problem begins here: 1993 Explorer 4x4 xlt 4.0 v6 multipoint fi. having idling issue when it chooses most times its in cold weather erratic idle 2mins after starting, drove it 80 plus...