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89 EB bucking bad!!!!!

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  #1  
Old 07-12-2002, 08:40 PM
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89 EB bucking bad!!!!!

Hi all. I am looking for some help. I have an 89 EB Bronco that
is running real bad. When I get between 30-40 mph, the truck starts
bucking, slamming and stuttering real bad. Then it will happen again
around 50 mph. At first, it would just bang into 2nd or 3rd, but now it's going crazy. Any suggestions would be incredibly helpful.
Thanks,
Gina

 
  #2  
Old 07-19-2002, 07:41 PM
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89 EB bucking bad!!!!!

fuel filter? fuel starvation possibly

 
  #3  
Old 07-19-2002, 11:14 PM
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89 EB bucking bad!!!!!

Pull the codes, instructions here:

http://www.off-road.com/ford/bigbroncos/tech/eec/index.html

I'm gonna guess TPS.
 
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Old 07-20-2002, 08:53 PM
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89 EB bucking bad!!!!!

Already changed the fuel filter, fuel pump, and the distrubutor modulator, still no good.
 
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Old 07-21-2002, 11:46 PM
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89 EB bucking bad!!!!!

Are you sure it is not your electronic shift module for your transmission that is acting up? When you said that your truck would SLAM into gear that is exactly what the symptoms are for a failing shift module. I am not sure how to test this module before replacement. Someone else want to jump in here that knows how to test the module. Let us know what you find.
 
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Old 07-22-2002, 06:46 PM
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89 EB bucking bad!!!!!

 
  #7  
Old 07-22-2002, 08:35 PM
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89 EB bucking bad!!!!!

Guess what guys, after replacing everything, get this, the spark plug wires were bad. Changed them and it is running like a dream!!!! Imagine that!! Thanks for everyones input, I am sure I will be writing again.
Thanks again!!!
 




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