Car's RPM drops to 800 when 20 MPH or lower.
When cruising with the feet off the gas pedal and letting the speed slowly decrease, I could see the RPM meter dropping from 1100 RPM to around 800 RPM when it hits 20 MPH and then back up to 1100 RPM again.
Also when the RPM drops I feel as though the car is halting a bit, as if the brakes have been applied for a split second and then let go.
Is this normal for the car to do? The AC unit has also been turned off.
Is this a good question?
5 Comments
@fred123 it sound slike you are having an automatic transmission. Just to clarify you are taking your foot of the accelerator and are wondering about the "surging" at 20mph/800 RPM with the car in gear?
by oldturkey03
Yes that is correct.
by Fred
@fred123 does the engine surge when just idling in gear or does it need to be coasting . in other words if your sitting at a stoplight does the engine surge then?
by Jimfixer
No the engine does not surge during a stoplight, only when coasting below 20 MPH.
by Fred
@fred123 sounds like normal behavior while you are "cruising" in gear without using the accelerator
Rep: 1
by oldturkey03