What causes the surge in a car engine?
Proper engine performance is dependent on a very precise balance of air/fuel mixture, spark timing and exhaust management; any deviation from any of these parameters will cause malfunction, which is often expressed as “surge” (rapid acceleration/deceleration cycles).
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.
What causes idle surges on a car ECM?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.
Can a bad throttle position sensor cause idle surging?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light
How long does it take to accelerate from 0 to 60 mph?
To reach this value at a linear acceleration, you must accelerate from 0 to 60 mph in 2.74 seconds. When braking, the start speed is higher than the end speed, the g-value will become negative.
Why is my engine surging at high RPM?
Your ignition timing may be set incorrectly. Check and adjust, ignition timing. Ignition system problem causing a, weak spark. So, if your engine has a distributor; check and replace distributor cap, rotor, ignition wires and spark plugs. And, you should also have the coil packs checked.
What causes a car engine to surge while cruising?
MAP systems are more prone to surge while cruising than MAF systems, although both will surge during acceleration if a vacuum leak is present. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
• 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.