bucking truck ***problem resolved***
Thread Starter
|
Junior User
Joined: Jul 2001
Posts: 82
Likes: 0
From: Houston area
bucking truck ***problem resolved***
Quote:
Originally Posted by dagray3
Hey, a few years back you posted on ford truck forums about a truck that was bucking and kicking at around 40 mph, while cruising. You said it was an intermittent problem that was getting worse. Did you ever resolve this problem? My truck is having the same symptoms and I was hoping you go it figured out.
Thanks
dave
Hello Dave,
I actually believe I have been one of the few to resolve this problem, if no the only one! The problem was the stator on the distributor. Basically its you electrical link to you truck. I thought it was due to a speed range which led me to check everything from fuel pump to control module. However, it was due to engine temp, not speed. When the engine heated to operating temp the stator (which is pressed onto the distributor shaft) would expand and wobble on the shaft. This caused a temp loss of electrical connection making the truck buck like turning a light switch on & off. I actually left my truck at a very reputable shop for 2 weeks before they found the problem. The owner was driving it everywhere, finally one day it starting acting up on him & he almost didn't get it back to the shop. When he arrived it was acting up at idle while still warm. He yelled at his mechanics to get over & he said they worked like it was an ER to pinpoint the problem which ended up to be the stator.
Since the stator is pressed onto the distributor shaft it cannot be replaced. You'll have to replace the complete distributor.
Afterwards I had to make some other repairs to get my truck to 100%. The computer thought the problem was fuel related so it made the fuel mixture richer which in turn fried my O2 sensor and catalytic converter.
After the distributor, O2 sensor & catalytic converter were replaced my truck ran better then I could remember. Was like a new truck!
Also, since the problem was electrical the problem never showed up on the on board computer. The computer was going down with the rest of the electrical system when the stator was acting up.
Wes
Originally Posted by dagray3
Hey, a few years back you posted on ford truck forums about a truck that was bucking and kicking at around 40 mph, while cruising. You said it was an intermittent problem that was getting worse. Did you ever resolve this problem? My truck is having the same symptoms and I was hoping you go it figured out.
Thanks
dave
Hello Dave,
I actually believe I have been one of the few to resolve this problem, if no the only one! The problem was the stator on the distributor. Basically its you electrical link to you truck. I thought it was due to a speed range which led me to check everything from fuel pump to control module. However, it was due to engine temp, not speed. When the engine heated to operating temp the stator (which is pressed onto the distributor shaft) would expand and wobble on the shaft. This caused a temp loss of electrical connection making the truck buck like turning a light switch on & off. I actually left my truck at a very reputable shop for 2 weeks before they found the problem. The owner was driving it everywhere, finally one day it starting acting up on him & he almost didn't get it back to the shop. When he arrived it was acting up at idle while still warm. He yelled at his mechanics to get over & he said they worked like it was an ER to pinpoint the problem which ended up to be the stator.
Since the stator is pressed onto the distributor shaft it cannot be replaced. You'll have to replace the complete distributor.
Afterwards I had to make some other repairs to get my truck to 100%. The computer thought the problem was fuel related so it made the fuel mixture richer which in turn fried my O2 sensor and catalytic converter.
After the distributor, O2 sensor & catalytic converter were replaced my truck ran better then I could remember. Was like a new truck!
Also, since the problem was electrical the problem never showed up on the on board computer. The computer was going down with the rest of the electrical system when the stator was acting up.
Wes
