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10,537 Posts
Hey Shawn,
Do I have anything to worry about with the cruise control on my '85 Ford Diesel pickup?? I've heard sometimes they get a mind of their own...*G*
OK, lets see...what happens if you stick your foot in it at the rpm level where you get the bucking?
Describe the carburetor and transmission type and rear gear ratio please...
From your description, if the car runs fine over 2500, even under WOT, I'd discount ignition and be taking a closer look at the carb...
If you can accelerate in 3rd gear from 1500 without bucking and hesitation, I'd say it's possible you have a chunkie stuck in your intermediate circuit....you say the idle is fine with 18"hg so I think your idle circuit is working good...
Try this....put the timing light on the engine and run it up in neutral through the problem area while watching the strobe on the timing pointer....any erratic or missing flashes?
When you've got some more details post back and we'll see what we can do....
Pat
http://albums.photopoint.com/j/View?u=1570936&a=11937754&p=42910787.jpg
Do I have anything to worry about with the cruise control on my '85 Ford Diesel pickup?? I've heard sometimes they get a mind of their own...*G*
OK, lets see...what happens if you stick your foot in it at the rpm level where you get the bucking?
Describe the carburetor and transmission type and rear gear ratio please...
From your description, if the car runs fine over 2500, even under WOT, I'd discount ignition and be taking a closer look at the carb...
If you can accelerate in 3rd gear from 1500 without bucking and hesitation, I'd say it's possible you have a chunkie stuck in your intermediate circuit....you say the idle is fine with 18"hg so I think your idle circuit is working good...
Try this....put the timing light on the engine and run it up in neutral through the problem area while watching the strobe on the timing pointer....any erratic or missing flashes?
When you've got some more details post back and we'll see what we can do....
Pat
http://albums.photopoint.com/j/View?u=1570936&a=11937754&p=42910787.jpg