navrotsm
New Member
- Joined
- June 26, 2012
- Messages
- 7
- Reaction score
- 0
- City, State
- clementon, nj
- Year, Model & Trim Level
- 2000 explorer xls-4 liter
short version: 2000 explorer xls with 4liter OHV -4wd. 5speed stick. will start right up and idle at 900-1000 rpm. touch gas pedal and it either stalls or stutters. replaced MAF sensor, throttle position sensor and idle air control; same result--idle only. replaced fuel filter--same result. replaced fuel PUMP (wadda pain in the arse!)--same result. checked---no vacuum leaks. how can it start right up and idle so smoothly and nothing else?? with no fault codes?? I'm at a loss!!
long version: engine has run flawlessly for last two years!! even with check eng light on. code for MAF sensor. couldn't find one at local pull-and-pay so put it off till last week. ran fine. installed new maf from rockauto and erased code. ran same--fine. next day code came back on?!! ignored. next day. drove to work, no problem. coming home from work, engine wouldn't idle. wanted to die below 1500 rpm---like fuel starved. got it home with lots of revs!! went out hour later, started right up but had very rough running. new code for IAC. replaced with new. still rough. next day went out--started right up---idle only!! took off air intake rubber to see throttle plate--was dirty--cleaned with gumout. runs same with air intake on or off. checked or vacuum leaks. found one hose off valve cover. replaced--runs same--idle only. replaced throttle position sensor--same. small exhaust leak at "donut" but nothing else wrong underhood that I can see. still just idles!!! I'M AT A LOSS!! and going a lil crazy!! ANY IDEAS??? am I missing something stupidly simple??? thanks in advance for any help!!!!!!
long version: engine has run flawlessly for last two years!! even with check eng light on. code for MAF sensor. couldn't find one at local pull-and-pay so put it off till last week. ran fine. installed new maf from rockauto and erased code. ran same--fine. next day code came back on?!! ignored. next day. drove to work, no problem. coming home from work, engine wouldn't idle. wanted to die below 1500 rpm---like fuel starved. got it home with lots of revs!! went out hour later, started right up but had very rough running. new code for IAC. replaced with new. still rough. next day went out--started right up---idle only!! took off air intake rubber to see throttle plate--was dirty--cleaned with gumout. runs same with air intake on or off. checked or vacuum leaks. found one hose off valve cover. replaced--runs same--idle only. replaced throttle position sensor--same. small exhaust leak at "donut" but nothing else wrong underhood that I can see. still just idles!!! I'M AT A LOSS!! and going a lil crazy!! ANY IDEAS??? am I missing something stupidly simple??? thanks in advance for any help!!!!!!
