What causes an engine surge at high speed?
What causes an engine surge at high speed?
Mechanical issues with the transmission can also cause an engine surge. However, always start with the simple things first. If the transmission checks out, you will want to turn your attention to the fuel and spark systems.
When to set DTC for engine surge maintenance?
• After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle. • If the actual idling speed varies from the target idling speed by more than 200 rpm five times or more during a drive cycle, the ECM illuminates the MIL and sets the DTC.
Can a clogged transmission filter cause an engine surge?
With the age of your vehicle, if you have never had your transmission fluid changed, this would be an appropriate time to have it serviced. A clogged transmission fluid filter can cause similar symptoms, and this is a standard replacement with a transmission service. Mechanical issues with the transmission can also cause an engine surge.
What causes an engine surge when the ECU is off?
If closed TPS voltage changes, the ECU may assume that your foot is on the throttle, causing a richer fuel mixture to be delivered. This can also be caused by a faulty TPS, or even a poor ground. With the engine off, check TPS voltage with the accelerator pedal relaxed. Then work the pedal a few times and see if the voltage changes.
• After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle. • If the actual idling speed varies from the target idling speed by more than 200 rpm five times or more during a drive cycle, the ECM illuminates the MIL and sets the DTC.
What causes a lawn mower engine to surge?
Some piece that’s broken or worn on the governor linkage. I can’t stand an engine that surges or sputters. Listening to my neighbor’s mower is sheer torture at times. People just need to learn how carburetors work and how to clean them.
If closed TPS voltage changes, the ECU may assume that your foot is on the throttle, causing a richer fuel mixture to be delivered. This can also be caused by a faulty TPS, or even a poor ground. With the engine off, check TPS voltage with the accelerator pedal relaxed. Then work the pedal a few times and see if the voltage changes.
What causes an engine surge during fuel injection?
In combination with the camshaft position sensor (CMP), the CKP signals are used by the ECU to manage fuel injection and spark delivery. A faulty CKP (or CKP circuit) can easily cause an intermittent misfire, which naturally results in what the driver may perceive as a surging effect.
