I am losing all power in fourth and fifth gear

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.

4 Replies

JACOBANDNICKOLAS

MECHANIC
108,268 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

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

JACOBANDNICKOLAS

MECHANIC
108,268 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

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