It is possible it is one of the speed sensors.
Engine surge in a 2004 Kia Sedona is often caused by a clogged fuel filter or dirty injectors. When insufficient fuel reaches the engine, it will exhibit these symptoms.
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we have a gas engine jenbacher 1006kw.we face a black shutdown due to exhaust back pressure high.
No, there should not normally be any engine surging while driving following installation of a new fuel pump.
It could be because of a mechanical failure on the engine. It would be safe to ave the vehicle looked at by a mechanic before driving it on the highway.
Mass Air Flow MAF sensor could be your, problem check that!
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probably the governor going bad
Take a look at to oxygen sensor. A dead sensor can cause your engine to surge and miss. If you live in the north were the fuel is oxygenated it happens more often. Something about O2 sensors being killed by oxygenated fuel.
A governor causes an engine to surge by regulating the engine's speed through a feedback loop that adjusts fuel supply or throttle position. When the engine speed exceeds a preset limit, the governor restricts the fuel or air intake, causing a temporary drop in power. If the engine speed falls below the desired level, the governor allows more fuel or air, leading to a surge in power. This oscillation can result in a rhythmic increase and decrease in engine speed, known as surging.
A vehicle may surge while driving due to several factors, including fuel delivery issues, such as a clogged fuel filter or failing fuel pump, which can disrupt the engine's power supply. Additionally, problems with the ignition system, like faulty spark plugs or ignition coils, can lead to inconsistent engine performance. Electrical issues, such as a malfunctioning sensor (like the mass airflow or throttle position sensor), can also cause surging by sending incorrect data to the engine control unit. Lastly, transmission problems may lead to erratic power delivery, contributing to the sensation of surging.