Engine surges under 60 mph can be caused by several factors, including fuel delivery issues like a clogged fuel filter or failing fuel pump, which disrupt the flow of fuel to the engine. Ignition system problems, such as faulty spark plugs or ignition coils, can also lead to inconsistent engine performance. Additionally, issues with the air intake system, like a dirty air filter or malfunctioning mass airflow sensor, can affect the air-fuel mixture, resulting in surging. Lastly, transmission problems or improper gear shifting can contribute to erratic engine behavior at lower speeds.
Just under 1.5 seconds.
it could be your valves or your engine
You need a battery. The battery prevents surges when you rev your moped. It should be located under the seat. If there is one you need a new one.
A flashing check engine light is usually a misfire.
Short answer is no. There is however a technical service bulletin out for the speedometer needle shaking at 60mph and above, as well as erratic operation. It refers to check a ground that is on the drivers side of the engine, as it loses connection. It is under the intake manifold, towards the middle of the engine.
Casket will age under its walking enviroment. This causes the engine to leak oil.
A ten second car could hit 60mph in under 10 seconds no problem. It could probably do it even if it had four flat tires and was pushing a dumpster.
There could be loose rings in the engine that would cause this. The valves on the engine may also be chattering.
replace the ignition leads then try the coil aswell Plugs, wires, cap, rotor, injector, internal engine, etc.
If a 1985 Ford F150 5.8, with a replaced speed sensor, cruise control surges and with a working pedal switch, it is due to vacuum leak. Check on the cruise box under the hood for any leaks.
A 350 engine will idle good but cut out and run rough while driving if there is a vacuum leak. This causes too much air to enter the engine under load.
not the perfect air fuel mixture. normal under load and acceleration.