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RPM (Revolutions Per Minute)

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How to Monitor Your RPM Gauge to Get the Best Performance Out of Your Car
A car tachometer, or RPM gauge, shows the speed the engine is spinning. Watch your RPM gauge to improve your car's performance and fuel efficiency.

Related questions

Question
Rev Counter Problem
Hello. Your vehicle will automatically shift at different points in time, at different speeds in order to maximize power and response. At lower speeds the gears will hold longer, until 4k rpm, and shift later, in order to accelerate at...
Question
transmission not shifting and the rpm's keep climbing up.
Hi there. It seems that the gears are slipping and causing the rpm's to climb up. Check the transmission fluid and make sure that it's full and red in color. Very dark red or black transmission fluid is an indication...
Question
Why does my car loose RPM when I'm driving?
Hi there. First check all of the fluids and make sure that they are full and top off all low fluids. Then check the battery and make sure that it has a full charge of 12.6 volts. If the voltage...
Question
While in park and stepping on the gas at 4000 rpm exactly the vehicles starts shaking.
The engine computer has a built in rev limiter built in to the programming that will not let the engine go above 3800 to 4000 rpms when the transmission is not in gear and driving down the street. This is...
Question
Engine light came on saying transmission system malfunction.
Hi there. The code is coming up for the torque converter clutch (TCC) is not working. Check the TCC fuse and see if it has blown. If the fuse is good, then the solenoid on the transmission that controls the...
Question
Engine only runs at 650 or 1300 rpm's, and nothing in between 650 and 1300 or above 1300 rpm's.
Hi there. First check the air filter on the engine. A dirty air filter will starve a diesel engine and prevent it from running correctly. Then check the fuel / water separator and see if there is a drain valve....
Question
I have a bus that contain a Cummins engine and Allison transmission. The problem is that the vehicle does not exceed the speed 80 Km/h / 50 mph.
Hi there. Check the fuel filter and the fuel water separator for if they are old and need changed. Check the fuel water separator for a valve on the bottom and if there is a valve, if you can open...
Question
MY car use to jerk at 700 and at 500 rpm it will quench. Injector, cam camshaft sensor, and spark plugs have already been changed.
Hi there. When the engine was washed off, water could have gotten into the air box and onto the air filter causing the engine to suck up some water when it was started. This could have caused the engine to...
Question
My RPM is very erratic and the engine surges on my 2006 Hyundai Elantra
Hello. I would usually start by scanning the computer for codes to see if anything comes up. If there are no codes then I would check and see if there are any sensors that are not reading correctly. It sounds...
Question
High RPM's after tune up.
Hi there. Sounds like the rodent that nested on the engine may have knocked off a vacuum hose or chewed through a vacuum hose. The engine idle could be high for a vacuum leak or the idle air control valve...
Question
Engine caps at 3000 rpm's, no cel light, and no smoke of any color. Uncaps when restart the engine.
Hi there. There could be an issue with the fuel system causing the engine to stumble and bang at times. Check the fuel / water separator on the vehicle and see if its been replaced before. If not, then the...
Question
Strange rattling sound from the engine when RPM goes down from 3,000.
Hi there. The noise that you are hearing is heat shields on the exhaust system are loose causing a rattling noise. Either the shield on the manifolds are loose or the shields on the catalytic converter are loose. If you...
Question
when i start my rav4(1997) the rpm goes high for about 5 min althought that wasnt occur before a period of time ,, what might be t
Hello, thank you for writing in. There are several causes for high idle after starting. The first thing to consider (although it has its limits), is that the engine does need more fuel when cold. This is why all cars...
Question
Engine surging while driving
Hi there. For the engine surging making the rpm's go up and down could be caused by a defective or stuck idle air control valve (IAC). Check the IAC and see if it's working. Remove the vacuum line to the...
Question
RPM not increasing Yanmar 6LY2A -STP
Hi there - there are a couple of possibilities here for the "won't get to engine max revs" condition. This engine has a governor, set at 3,000, and a malfunction of the governor could be limiting RPM. It's also possible...
Question
Turbo damage in 1.2 TSI
Claimed by David Gaines Wooten
Question
Suddenly my engine surges on rpm on the freeway or main street at 40 mph between 3000 rpm's to 4000 rpm's. Could it be the EGR?
Hi there. Check the distributor or coil packs to the vehicle. The surging would most likely be caused by the electronics getting old and causing a delay in the spark ignition. I recommend replacing the spark plugs and wires and...
Question
Engine hunts/stalls at idle.
Hi there. The issue seems to be a vacuum leak on the engine. Get a stethoscope that is made for automotive vehicles and listen for a hissing noise around the intake gasket or the intake hosing to the throttle valve....
Question
car makes a sandpaper rubbing type noise, the rpms don't want to go up as usually it shifts gears very weird
Hi there. It is possible that you have multiple problems causing the lack of acceleration on your Camaro. Most of the time, the engine issue is caused by an obstruction of fuel, due to clogged fuel injectors, a dirty throttle...
Question
The car does not work at all.
Hi there. Check the camshaft position sensor and see if its plugged in. If the sensor is plugged in and the engine will crank, then the camshaft could be out of timing and needs to be reset. If the engine...

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