1999 Ford Explorer 99 Ford Explorer with tune up, CEL on st

Tiny
ROCKETKNIGHT03
  • MEMBER
  • 1999 FORD EXPLORER
Engine Performance problem
1999 Ford Explorer V8 Two Wheel Drive Automatic 150k miles

Replaced everything to do with the EDIS module ignition system. Still kicking a miss fire code, seafoamed it out. Notta, checked all the vacuum lines on it. Cleaned them out and also looked for leaks. Throttle body looks good and no issue. Fuel pressure is at 40psi, which is good. Runs good until cel comes on, so closed loop mode. Just has a check engine light that seems to never to want to leave.
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Friday, January 8th, 2010 AT 4:49 AM

9 Replies

Tiny
DOCFIXIT
  • EXPERT
Hi To help would you post the code?
Thanks for donate
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Friday, January 8th, 2010 AT 9:50 AM
Tiny
ROCKETKNIGHT03
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Miss fire code P0300, and sometimes P0306. Going to swap out number 6# injector later today, to see if it's just that.
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Friday, January 8th, 2010 AT 12:44 PM
Tiny
DOCFIXIT
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Check the crankshaft pulse ring behind pully for loosenes or bent. Crankshaft sensor very common in Po300 also common is vacuum leaks and EGR problems.
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Friday, January 8th, 2010 AT 12:58 PM
Tiny
ROCKETKNIGHT03
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When I said I replaced the whole EDIS system, I also replaced the crank sensor after it tested bad. Ring is good cond still. The 5.0l has really no vaccum lines, all ready checked them. Wouldn't the egr system throw a CEL regarding the evap?
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Friday, January 8th, 2010 AT 5:14 PM
Tiny
DOCFIXIT
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Cam sensor replaced also?


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_316.jpg

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Saturday, January 9th, 2010 AT 2:11 PM
Tiny
ROCKETKNIGHT03
  • MEMBER
The crank is the cam sensor on this one I believe, compression tested the number 6 cylinder last nite and found nothing out of the ordinary. Above 150psi. Might try a leak down today, looking for maybe a possible bad valve. Since they seem to always had bad valves since forever.
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Saturday, January 9th, 2010 AT 4:10 PM
Tiny
DOCFIXIT
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Leak down good idea there is a camshaft sensor top front engine


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_319.jpg

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Monday, January 11th, 2010 AT 8:11 AM
Tiny
ROCKETKNIGHT03
  • MEMBER
Compression tested good, leak down a bit low. Running compression tested good at just a bit more then the 80% for perfect. Higher means exhaust valves. Lower means intake. Nice test for FORDS! Did a hard memory restart over the weekend. CEL is now off after 5 miles so far and all sensor at reading at present time.
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Wednesday, January 13th, 2010 AT 12:28 PM
Tiny
DOCFIXIT
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Great news Fords are very difficult to diagnose and in newer models better but still a pain
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Thursday, January 14th, 2010 AT 8:20 AM

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