Why does my car rev high when Started?
Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid.
What determines how quickly an engine can rev?
The strength of the material in the rods (and to a smaller extent, pistons and crank) determines how quickly they can spin before they distort, bend, or break.
What allows engines to rev higher?
Lower piston speeds means less stress on the connecting rods and crankshaft as well as acceptable flame propagation speeds, allowing the engine to rev even higher. Also, by having a wider bore, you can have larger intake and exhaust valves, leading to better airflow at high RPM.
When do you start the car, the engine revs?
Car engine revs way up immediately upon starting engine. Q: Car engine revs way up immediately upon starting engine. When starting the engine, it sounds like you have your foot pressed to the floor on the gas pedal as soon as you start it, without even having your foot on the gas.
Why do cars not rev all the way up?
The answers that say that this is to prevent the engine from over reving and blowing up are wrong. The mechanism in charge of doing this is the actual rev limiter which is programmed into the ECU and cuts either fuel or spark to the cylinders to prevent the engine from spinning too fast.
Is there a limit on how hard you can rev your car?
You cannot rev a modern car beyond a set limit the manufacturer has imposed. Except if you downshift too early (or grab the wrong gear) in a manual, while already at high revs. The resultant rev increase could go well past the redline. Sitting on the limiter can’t be good for it.
What’s the best way to rev your car?
Look at the specs. Look at the max torque produced at what revs. That is what you should rev to. Most fuel efficient. Driving like grandma is not efficient, and pisses people off. I wish more people would understand how to drive. By all means, give it some stick every now and then. Driving should be fun too. (disclaimer: don’t speed!)