Questions tagged [rpm]

RPM = number of Revolutions Per Minute. Most commonly an acronym for engine crankshaft speed.

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RPM running to high and don't kick down on 2005 trailblazer

My 2005 trailblazer automatic ! had a almost new engine put in April. Ran perfect. It started pour oil and my rpm would not kick down without me letting off gas. Both started at the same time ! Oil ...
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22 views

Is the AC compressor drawing a large load to the engine causing it to idle poorly?

This is for an 04 Honda Accord 2.4L that's been acting strange. When the car is running and AC is off, car runs fine while driving but when I come to a stop, the engine sort of shudders and RPMS ...
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Unsteady RPM when ac is on

Hi guys I have a 2019 Lexus GX460 with a mileage around 8000. Recently I noticed that whenever I turn the ac on in idle, the rpm went up and down every few seconds with loud noises from the engine bay,...
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Rough RPM idle transition when AC is ON

I have Kia Picanto 2017. I noticed that when I'm driving and depress the clutch (say would switch to neutral to stop for a red light), normally the RPM should go down to the "normal" idle level but ...
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49 views

Why do some motorbikes need consistent throttle/acceleration/raise to keep the engine alive even if i have pressed full clutch?

I am used to riding Pulsar 150, when I press full clutch in that, the engine is still alive without the need of throttle/acceleration/raise to keep the minimum rpm. But I was riding a TVS Apache RTR ...
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28 views

Toyota Tacoma running high rpm

I have a 2003 Toyota Tacoma 4wd with manual transmission. It is running at 4000 rpms at 70 mph. What would cause this?
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3answers
42 views

RPM AND TORQUE IN INTERNAL COMBSUTION ENGINES

IN internal combustion engines, when the explosion in the chamber occur producing power this power appears as an increase in torque and RPM, what confuses me is that how I could raise the RPM while ...
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14 views

Hyundai i20 1.4 glide 2012 model

Evening guys, my car has a very serious problem, it consumes too much fuel and i have noticed that my rev counter is very high when driving, if am driving 100km\h the rev counter would be at 4100rpm, ...
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32 views

Car idles low when cold but increases when it warms up

Toyota Camry car 2001; Idle at start up is low when engine is very cold and gradually becomes "Normal" as engine gets hotter? I thought it was suppose to have higher RPM's when engine is cold and ...
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2answers
139 views

Does the flywheel really complete 33 revolutions per second when the engine is set to 2,000 RPM?

My car's RPM meter says x1,000 for each notch, therefore when set to 2 this implies 2,000 RPM. I can't visualise an engine's flywheel turning 33 times per second when the car is set to 2,000 RPM - it ...
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34 views

RPM Sometimes Jumps

I have noticed an issue today when driving and was hoping someone might have some ideas. Car is a 2008 PEUGEOT 207. I have noticed that sometimes when I floor the accelerator at 4th and 5th gear, the ...
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Why does the RPM (revolutions per minute) fall drastically when I use the windshield washer?

I have a Ford Fiesta 2013 model and when I use the windshield washer the RPM falls drastically, it's almost like the car is braking by itself. Does anyone know what might be causing it?
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55 views

Engine splutters and dies when I rev it at low RPM, but at high RPM it revs fine

My Datsun 240k runs very rough at low RPM, and if I push the accelerator to the floor quickly, the engine splutters and dies. If I slowly rev the engine to about 3200 RPM, and then floor it, it revs ...
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36 views

Tachometer isn't smooth, jumps up

I've got a 2005 Nissan Almera N16, and for some reason the tachometer doesn't rise smoothly when the engine speeds up, instead it jumps up. It doesn't look like it's sticking so not sure why it is. ...
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Chevy Colorado Lt

I have a 2004 Chevy Colorado LT and it idles at about 800-900 rpm and when I rev it just a little it drops down to 500 and takes a second to go back up to 800. I was wondering if maybe this is a dirty ...
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87 views

RPM fluctuates in idle after timing chain repair

I have a 2nd generation (GD) Hyundai i30 produced in 2012. The engine has a volume of 1.4l and runs on gasoline; engine code is G4FA. I bought the car 2nd hand in 2015 at around 22k km. After driving ...
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Aerox 155 max rpm dropped to 7000 rpm [duplicate]

Good day everyone, need help with my aerox 155 issue after installing an after market pulley and driveface. Including iridium spark plug. My aerox 155 cannot go beyond 7000 rpm at full throttle. As a ...
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158 views

Aerox 155 7k rpm max issue

Good day my Aerox 155 dropped max rpm to 7000 the time I changed my pulley set (rs8 2 angle pulley and drive face). Using my stock pulley the rpm max limit was 8000. I'm using the same fly ball ( dr ...
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Toyota Mark ,Gx110. RPM High

I am experiencing high RPM when I start the engine for my car Toyota Mark 2 ,Gx110. 1.What case this to happen? 2. How will I solve it? Regards, Jeccy James
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65 views

High Rpms and loud reving sound

I have a 2008 mercury sable. Its an automatic. I was in stop and go traffic this morning on the highway and I went to accelerate and the Rpm shot up as high at they could go and stayed there and the ...
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39 views

Mazda Demio 2002 75HP 1.5 high engine RPM on idle

I am the owner of Mazda Demio '02 1.5 75HP (engine code B5E). The car has an issue of high RPMs (more than 1000 and hestitating) on idle. What is interesting here is whenever I press and hold the ...
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Benelli 600i - Hanging Revs when decelerating and idle surge but fixes after restarting the motorcyle

Having this strange issue lately where the RPM hangs when closing the throttle or drops slowly. The idle also surges to around 2k rpm. As weird as it sounds the problem seems to go away when I restart ...
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16 views

Hyundai accent rpm 600- 800 at red light

When i start my car my rpm fluctuate 600 to 800 Looks like it will turned off but not Engine is shaking
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185 views

Increasing engine rpm when AC on

I have Maruti Alto LXI 2004 model.Now it has driven 96000 km. When I drive on traffic with AC,the engine rpm increase as unusually. And also engine power is go down.... what can I do for that??
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466 views

Vauxhall Astra rev/rpm go high when I put my accelerator down after changing gears

I have a 2006 Vauxhall Astra SRI 1.8. Recently I have been experiencing an issue where after I change gear and put gas down, the car revs and seems like little/no power is actually going to the wheels....
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35 views

Highly steeped-hill with heavy car with manual transmission [closed]

So, there's this really steeped hill to access my grandfather's house. Accessing it downhill is not difficult by using first gear. However, climbing it is the difficult thing. What to do when you are ...
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1answer
108 views

Is 4000 RPM a normal rpm for a diesel school bus at 55 mph?

I have a Thomas 1991 school bus (36K gvwr) with a CAT 3116 engine and an Allison MT 643 transmission. I purchased it quite recently and when driving it on the highway, the engine RPMs are at 4000 ...
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3answers
635 views

Why does the RPM fluctuate when a vehicle is started for the first time in a day?

I've observed this in my car, and in the motorcycle (carburetor) that I had previously. When I start the car in the morning for work, the engine RPM starts off a bit high than the normal (+0.3 - 0.5 ...
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34 views

BMW 328i 2009 - RPMs Jump when it’s on reverse

My RPMs jump when it’s in reverse. Is this normal? But it stops after a while. I’m just curious.
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4answers
96 views

What constitutes gentle RPMs in the winter?

I drive a 2013 Fit, manual transmission. I shift by sound. When accelerating, I shift up when RPMs reach 3000. When decelerating, I have developed the habit of blipping the accelerator pedal to get ...
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271 views

Why my car RPM goes up while Parked

Please help. I drive a Toyota Spacio 2002 but after driving for a while when I change from drive to P (Park) the RPM needle moves up slightly and there is some noticeable change in the sound of my ...
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86 views

RPM drops to 1200 while driving

While driving 2004 Chevy HD the RPM without any warning drops to 1200. There has never been a backfire or rough idling,accelerates fine,shifts fine? I have to pull over and restart the engine several ...
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176 views

I20 rpm down to 600?

Hyundai i20 rpm down to 600 from normal rpm 800 or 850 rpm when idle. I have cleaned throttle body but still same low rpm. Please help it's emergency.
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54 views

Engine speed, vibration and rpm

I have few doubts with my motorcycle (Apache RTR 180 ABS version). When I ride on top gear I have noticed the engine vibration is reduced much when at 84-86 Km speed (RPM around 6400). I feel ...
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29 views

Engine not rev over 3500 after new ECU installed same number

I have Honda civic vtec 1999 with D15 engine installed. ECU/PCM reporting error and mechanic told me this computing having issue in IC I bought new ECU same number but after connecting, car engine ...
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28 views

Diesel truck at 40Mph huge “stall” and then kick

So I have an 01 Chevy Silverado and i have a little strip that i like to see how fast my truck can go 0-60. The problem is that when I'm accelerating, at around 40mph my truck "stalls"(like im pushing ...
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65 views

Random RPM boost

For the last week I've been having an issue with my RPM boosting highly for no reason. I drive a Peugeot 307 1.6 HDI S 90BHP. Whenever I shift from 2nd to 3rd and start gassing it up a bit moving up ...
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1k views

Aggressive car vibration at 1700-1800 rpm

So my girlfriend bought a used car, a Hyundai i20 2011. 1.4l 55kW diesel motor. She bought it with a guy who is a mechanic, so I was expecting the car to be OK. Once I got to try the car out, I was ...
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2answers
102 views

Why does my car keep having high RPMs and not speeding up over 10-15 MPH?

it’s done this twice in exactly a week and every time I take it to the mechanic the check engine light turns off and they don’t do anything. It’s a 2009 Chevy Aveo
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108 views

VW Golf 2012 DSG auto transmission runs fine but accelerate very slowly with the D1 gear

A month ago, I changed my DSG auto 7-speed transmission's mechatronic because of another issue and after that everything was working just fine. Recently I found that when I start my car and switch my ...
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1answer
28 views

Impala's RPM bounce

I have a 2003 Chevy impala LS 3800 motor ... anyways, the RPM's tack will bounce while in overdrive and seems to be random at every time; It could be weeks on end but then it could do so everyday. It ...
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217 views

When braking RPM drops and radio cuts off (Sometimes when rolling down the window same happens)

I have a 2002 Honda Civic, it has been working great for many years until now. I have been having strange things happen: When I apply the brakes or roll down the window the RPM drops and my radio cuts ...
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37 views

Rpm gets drop in cng while changing the gear

I have a Hyundai Accent 2014 with CNG fitment. For 3 months I have not been able to resolve my problem as my RPM drops when I change the gear. I don't know what is happening with it. I showed to CNG ...
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65 views

Cannot hold constant RPM on Neutral with accelerator pedal

Having Chrysler Town & Country 2008 with 4.0L gasoline engine. Is it normal that i'm not able to keep engine at 2k RPM for 10 seconds? After some seconds, it just climbs itself up to 3k, but i'm ...
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212 views

RPM Lagging On Mazda 3 - 2008

i have mazda 3 2008 with auto transmission. after drive for 10-15 mintues the rpm get lagging. (when the lag start i lost a little performance on car :: pushing the pedal the rpm goes to 4000 but ...
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Why is this RPM graph squarewave?

'07 Subaru Outback 3.0R 5 speed auto. I am logging using the excellent RomRaider and was kind of surprised that when graphed RPM looks like a square wave in most situations, don't know if it was ...
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1k views

Low idle while on Drive - Lexus LS430

Today I noticed something annoying on my 01 UL LS430, The RPM rate drops to around 500 when I set the transmission to "D" along with a slight vibration and strangely. If i change that to P, N. or even ...
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860 views

Car rpm unstable when idling

Car's rpm keeps dropping below 1k an then climbs up to 1.5k and the process repeats and repeats. It happens when i turn on the AC but when i turn the AC off it seems to be more stable. Some people say ...
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856 views

Engine loses power at certain rpm once it gets hot

I have a Pulsar 220 which starts good but after riding few kms, engine starts getting too hot. Even the high temp and oil change sign starts blinking. There is no issue with engine oil. As I get it ...
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133 views

Motor RPM given car speed, gear and wheel radius

Reading about Tesla cars I found that they can achieve 16000 RPM, single gear ratio 9.73:1 and differential ratio around 8.28:1, but... if I try to get RPM from car speed (max 200 km/h): RPM = car ...