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The truck cranks over, it has spark, good fuel pressure and compression, but it back fires through the intake

Tiny
BUB2782
  • MEMBER
  • 2000 FORD RANGER
  • 16,000 MILES
I have a 2000 Ford Ranger with a 3.0 Flex Fuel engine, I recently replaced the cam synchro and now the truck backfires through the intake. I followed all the steps correctly that I found online. I'm not sure if I'm on the intake or exhaust stroke for tdc, or if it's something as simple as a bad relay. Any help is greatly appreciated.
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Friday, June 22nd, 2012 AT 6:20 PM

4 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Was special syncro tool used? If no damage will occure fuel injection will be offf. Must use tool
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Friday, December 15th, 2017 AT 1:39 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Tool
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Friday, December 15th, 2017 AT 1:39 PM
Tiny
BUB2782
  • MEMBER
  • 7 POSTS
Yes the alignment tool was used, and all the steps on how to replace the synchro I found online were used, I'm just hopeing that it is something simple and stupid.
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Friday, December 15th, 2017 AT 1:39 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Why was syncro changed? What where symptoms? Instructions used from Chilton or Mitchell?
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Friday, December 15th, 2017 AT 1:39 PM

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