I am losing all power in fourth and fifth gear

Tiny
BRAHMBRONCO
  • MEMBER
  • 1989 FORD
  • 2.9L
  • V6
  • 2WD
  • MANUAL
  • 68,000 MILES
As soon as I shift into fourth gear I lose all power in my bronco ii. 1st through third to be normal but 4th seems to stay right around 2000 rpms. I have replaced the fuel filter which seemed to be original and checked the tranny fluid which seem to be normal. The engine sounds find and revs normal but I cannot figure out why fourth gear and fifth do not have any power. I have yet to get it to go over 50 miles and hour.
Monday, January 13th, 2014 AT 10:10 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Is there a misfire? Have you checked to see if the catalytic converter is plugging? Is the fuel pressure within the manufacturer's specs?
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Monday, January 13th, 2014 AT 10:20 AM
Tiny
BRAHMBRONCO
  • MEMBER
  • 3 POSTS
The catalytic converter has been removed. It seems like the engine is receiving fuel but I have yet to check the fuel pump.
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Monday, January 13th, 2014 AT 10:43 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Check pressure and see if it is within the manufacturer's specs. It may be weak.
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Tuesday, January 14th, 2014 AT 4:48 AM
Tiny
BRAHMBRONCO
  • MEMBER
  • 3 POSTS
I have checked the fuel pressure and everything is up to specs. There is no misfire it seems to stay around 50 mph. I thought it might be taking into much air so I checked both the fuel lines and vaccuum lines and everything seems fine. I'm out of ideas! Thanks for the responses!
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Tuesday, January 14th, 2014 AT 5:37 AM

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