73k miles,no check eng light on,no codes,only does it when going up small grade above 40 mph and eng at operating temp.runs perfect when eng cold at any speed.feels like hitting small bump in road truck will **** or studder,can accelerate slightly and will stop,but will come back when rpm and speed level off,then may not start again for a few miles,have tried fuel treatment and fuel cleaner,no luck.at hot idle eng is smoothe but get up to over 40 and it will start again but is not constant.
Do you have a tow hitch on your truck? Does it rattle when driving on bumpy roads? I had a truck same year and make when on a certain road the timing would ****** problem traced to knock sensor.
SOURCE: 2000 buick regal, abs studdering noise.
If you are braking hard and one or more wheels lose grip, the ABS system will modulate brake pressure in pulses to the slipping wheels. That is a normal feeling when this is happening. If you have a pulsation under light braking, it is likely that you have brake rotors that are no longer true and and need to be replaced or machined.
SOURCE: ford f-250 super duty,overdrive will bump on a
what do you mean by "bump?"
if it is vibrating it could be one or more things and if it is down shifting hard to lower gear it could mean other things.
SOURCE: My 03 AV seems to studder when doing over 50 mph
No spark plug is good over 60,000 miles
You most likely, do have at least one bad
COP Ignition coil
Also,check EGR Valve,if issue is under a vacuum
load,going up hill
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no tow hitch
75K,is usually the life of the fuel pump,Instead of code reading a data steam watching the fuel trim ,will pin point and verify the concern,
Check the transmission fluid level
fluid level ok
problem getting worse the farther i drive
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