If the vehicle has a carburetor, check the rubber hose from the fuel filter to the carb. If it's old, when running at higher speed the increased pressure will cause the hose to "pinch" closed thus restricting gas flow.
Could be a fuel pump going bad or a clogged fuel filter,
Just Getting By - 2010 Speed Dating for a Cause 1-6 was released on: USA: 15 April 2011
sounds like a fuel filter, do you have any more dignostics?
Not much info to go on but a complete tune up might be in order.
Yes,because if a force is getting weaker it causes the speed to slow down but if the force is getting stronger it causes the object to move faster.
rev limiter, engine will sputter when it hits this limit to keep engine from over reving
If it sputters under drivers seat only aT 30 mph or over, it may be not so much speed but wind related-chk for loose undercarrage flap, exhaust system or anything directly under car for loosness-especially exhaust shields.
It may be a EGR valve issue. This valve is normally closed at idle and opens at about 40mph.
Don't speed!
AnswerFuel Pump?Fuel Filter?Catalytic converter?Air filter?While all of the above will affect the engine speed performance, the sputtering or popping you are experiencing is caused by the oxygen sensor. It can cause this problem without causing a check engine light to come on.
You may need to adjust the carburetor. It sounds like it's running too rich.
check your fuel filter by trying to blow through it, if its hard replace the fuel filter, or your fuel pump is trying to go out