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If you mean why the difference in RPMs between idling and driving, the difference is due to the engine load; At idle, the engine isn't really doing much other than staying running, but under load (driving) the engine has to put its power out to the drivetrain, hence the symptomatic loss of engine speed (RPMs).
What else can I help you with?
How do you save gas driving a steep hill?
You can save gas driving a steep hill by driving the car at a lower RPM.
RPM in term of car power?
torque is at low rpm, horse power is at higher rpm. as you gain hp, you lose torque and vice versa.
What causes a cars rpm to suddenly jump while driving?
What can cause the RPM on a car to jump while driving is a problem with the transmission. It could be a problem with the gears in the transmission itself.
What does it mean when rpm goes back to zero but car is still driving fine?
Your tachometer is broken.
What is standard of rpm while driving?
depends on what car and what engine, typically if your cruising on a freeway, you will be running at half RPM or at the most 3/4, but the lower RPM the better with that you get better gas mileage.
Why does my cars RPM suddenly increase when driving at a consistent speed for no apparent reason?
your car must have turbo system in it.turbo starts working at a selected RPM.
While driving your car revs excessively reaching 6-7x1000 rpm What is the problem?
transmission is slipping
Why do car engine go off and on when driving?
its not turning off and on its just losing and gaining rpm`s
When driving your car the rpm goes up to 5000rpm and engine roars like it is not in gear?
yes, its in Neutral.
What are mufflers on a car and why do I need them?
With no mufflers you will gain horsepower but lose torque. Backpressure needs to be created for lower rpm driving. No mufflers will cause the car to be hard to drive in lower rpms causing you to have to drive higher in the rpm causing worse gas mileage. I put a high flow cat and less restrictive muffler and removed the resonator on my car and lost 3lbs torque and gained 18hp to the wheels.
Will a bad battery cause your car to lose power at higher rpm will it idle low at a stop?
No, but a bad alternator will.
1992 grand prix 3.1 multi port why cant you get your car to go over 4000 RPM while driving when the engine is cold or hot is it the coolant temp sensor?
over 4000 rpm's???? If you've been driving the car this hard, there might be several other things wrong.
