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    • Revving on cold start. Revving it hard when cold may cause undue wear.

  • Revving on cold start I don't even understand the need for a conversation about "high idle" on a cold engine. When the sensor malfunctions, it can result in an incorrect fuel and air mixture, leading to excessive Nov 2, 2010 · Doing either of those things is not a good way to warm up a cold engine. And he'd sit there with the engine screaming to warm his car up quicker cause he May 5, 2011 · so i finsh work. My very amateur diagnosis is a faulty cold start sensor, but I want some input on what other culprits might be (or if I’m wrong altogether. Go ahead and try it. this is particularly true for higher revving cars or higher Feb 22, 2008 · 3rd gen V8's tend to rev high (2000) during a cold start, then goes down to about 1200rpm till it warms, then it drops to about 800-900. I understand how the cold start system functions. 5 years. Details: https://gmauthority. I always thought this was wierd (and mine is not the only one that does this) but I guess it's a computer thing. 2 diesel skyactiv AWD in August 2022. 6L Turbo. The current problem I'm having is that on cold starts (i. You would be much better off with frequent oil changes with an OEM approved oil. The way it's done is actually more like the car is deliberately revving its own engine than that it's unstable. Revving the engine to a very high RPM when it is cold can actually damage it. Michaelc291. If you previously thought that revving a cold engine is cool, think again. 0L engine, the max RPM I can get in Park or Neutral, is 2500 rpm. It will not idle on its own either. DISCLAIMER: Toyotaownersclub. it has only done 1600km, so new, 2010 zx10r. Jun 18, 2020 · SHOULD YOU REV THE ENGINE TO HELP IT ALONG? Since the engine’s idle speed is higher during a cold start, how about revving it even higher to “help it along”? According to our engineer, this would be detrimental. Has a khein Apr 18, 2023 · Recently, I've noticed my CX-50 revving to about 1,500 RPM before settling to around 900 on a cold start. Subarus have terrible piston wobble at cold startup and should not be freely revved when cold. Yes there is the problem of piston wobble in subarus, especially older ones, when cold, but shouldn't be too much of an issue. 0 auto 4dr. Post Apr 10, 2021 #1 2021-04-10T15:01+00:00. Includi Oct 24, 2024 · Understanding how engine temperature affects various components helps clarify the risks associated with revving an engine in a cold state. I'm guessing 5-6K RPM's. 3L V8 roars to life with an aggressive cold start and exhilarating revs. When starting from warm, say after stopping for petrol or a quick shopping trip, it also revs high briefly, and the exhaust "pops" (great sound!!) attracting attention from those people nearby. Jan 12, 2021 · Q: Why does my car rev high when I start it but then goes back to normal idle? A: If your car revs high when you start it but then goes back to normal idle, it could be a result of the engine’s cold start strategy. When you rev your engine on a cold start, several things occur. You should let the engine warm up on its own. At about 50 seconds into the 1969 Chevelle SS "Flat Rat" Cold Start. You may not notice it at first, but incessantly revving a cold engine will aggravate friction and cause more damage. Since I bought it, it always revved up the engine automatically to 1800 rpm on cold start for around 10 seconds and then slowly goes down to idle. e. Dec 20, 2024 · It’s especially bad to rev your engine on a cold start. Mar 10, 2012 · High Revving On Cold Startwhy? eBay Disclosure: As the club is an eBay Partner, the club may earn commision if you make a purchase via the clubs eBay links. start bike up. he only reved it to 6000rpm not even but still i was pissed and i had The issue is that in cold start the oil hasn't worked it's way up to the top of the motor yet. if not, i continue leaning it left/right a few more times Sep 14, 2015 · I searched the forum and can see posts about this rev high on cold start. View Profile View Forum Posts View Articles Dec 15, 2019 · This was after they had fitted a replacement Lambda Sensor to one of the header pipes to correct whatever was causing the warning light and the light remained on. Go. I hit about 80 miles and I started noticing this high rev cold start issue. How cold of a day was it? If it was just a normal day, say 50*-70*F, then I'd say its nothing too bad to be concerned about. Mar 7, 2024 · Why Is It Bad to Rev a Cold Engine? Some drivers revving the engine to warm up a car from a cold start but that’s not necessary under normal circumstances. Meanwhile, various sensors, including the throttle position sensor or idle air control valve, actively manage airflow and engine speed; any faults in these sensors can lead to high RPMs after ignition. Myths about Revving Engine Cold Safe Apr 6, 2020 · Thanks for posting the fix for your vehicle's problem to this "high rev" on cold start! USA, Western NY, 14777 09 Spectra 2. It takes almost 40 seconds for it to settle down to 900, and on its way down it jumps around (1,100 > 1,000 > 1,200 > 1,000. com Jan 17, 2025 · Cold start engine mistakes are easy to avoid with a little knowledge and care. Thread Tools. Revving the engine may hasten the warm-up process. Sometimes it'll rev higher and more than once. my workaround is to shuffle off to the side of the road, turn the bike completely off, lean the bike left/right for ten seconds, smile at any onlookers and then usually the bike will start and idle properly. 97 98. I can't believe that it would be very much different on the 1. I thought this was because the engine was Apr 10, 2021 · OVER-REVVING AT COLD START OVER-REVVING AT COLD START. The pistons take some time to warm up and expand into their clearances so that they don't wobble around within the cylinder. g. I usually run the engine for a few seconds at least before riding off (to allow the oil to circulate), and don't really rev it until a few minutes into the ride. standing around for a couple of hours) the car starts up and jumps to high rpm (1800) and then, after 5 seconds, comes down to 1500 RPM and stays there for 15 seconds before coming back down very slowly. On my non-turbo 2. Myth: You should rev the engine right after starting to warm it up faster. i bought a turbo temp moniter to shut my turbo deseil down a few minites after i take the key out so the oil in the turbo is cooled down enogh so the oil wont harm the turbo lines also May 5, 2008 · On our 2,000 mile 2008 Acadia SLT 2, we are having at issue when the car is started for the first time after sitting overnight/all day. My problem comes in with starts where the coolant temp is still in the "normal" Nov 10, 2015 · I have driven my 1. Minimise idling time to 30–60 seconds. It has gotten so bad that when you remote start the car, you can see the lights dimming as the Jan 11, 2009 · Need advice I have a 87 LT250r that on start up on choke will rev at full throttle and stay there for about 5 to 10 seconds after choke is off even with kill switch off, key out and spark plug wire off, also does this after quick jab of throttle. Also revving your cold start subaru messes up your fuel trims. Use the correct oil viscosity for your vehicle. Apr 20, 2011 · I have a Rogue 2011, AWD, SL with 18000 miles. That DOES NOT mean you can start it's engine from cold, Rev the shit out of it and drive down the street like your in F1 and not have negative consequences. Revving it hard when cold may cause undue wear. 33-litre engined car up a steep hill by flooring the accelerator pedal practically immediately after cold start every day during the last 3. When you rev your engine on a cold start, the engine’s temperature changes fast. How can the cold start rpms adjusted ? Ride safe Dec 7, 2017 · So I've been noticing at cold start up in the morning my 2. IM LIKE WHAT THE FUCK!!!! the ride home i was paranoing he did damage to my motor. It's started revving hard on its own after a cold start. Many vehicles have a cold start program that increases the engine rpm to help with initial warm-up. Really revving it before the oil can circulate will cause excess wear on the valvetrain and could possible starve the top end of oil. Basically, don't floor it, and try to keep the revs under 3500. Thread: Over revving on cold start. Revving a cold engine places extra stress and Following these tips will allow a cold engine to start safely without excessively revving or stressing components before properly warming up. In this state, the oil cannot provide proper lubrication to the engine's moving parts. Aug 28, 2022 · Most cars that I have driven rev high for a few seconds (5-10 secs) during a cold start, but I’ve noticed my car revving for a good 45sec-1min every time when I start it in the morning, and after a brief 30 min stop somewhere (ie at the store). Avoid hard acceleration or high RPMs until the engine reaches its optimal operating temperature. however, longevity will start to create issues as you're potentially beating up the pistons, rings, bearing, cylinder walls, etc. See full list on carcarehacks. It typically only does this upon a cold start, and only once or twice a week. boldfox. In fact, revving your engine when it’s cold can be harmful, because: Cold engine oil is thick and takes a few minutes to lubricate valves thoroughly. Engine revving when cold start Hey guys I bought a 2009 Mazda 6 with 69k miles (111km)a month ago and noticed that every time I start the engine it revvs all the way to 1500/1600 RPM and slowly comes down to 900/1000 RPM, is this normal? Nov 8, 2018 · Every morning when I start the car for the first time, it seems to blip the throttle and increase the revs for a second. 6/ 08 Pontiac G6 gt 4dr Oct 5, 2004 · yeah cold start, thats the another reson to buy thoes remote starts it alows the oil in the engine to warm up to operating temp (correct viscosity in colder climates). The further a vehicle’s accelerator pedal is depressed, the more noticeable and prolonged revving will be. I have to do either that or alternatively using a very small gear (and therefore high RPMs), or both using a very small gear and travelling the hill very slowly. It’s best to let the engine idle briefly before driving gently. However, revving that occurs randomly, or seemingly without cause, is another thing entirely, and can be cause for concern. But the car started teasing me, and that made me angry because it would HARD REVVING/COLD KICK START🏍#sona devi max comedy#requested#JIYA VLOGS#subhashnupurvlog. Cold engines tend to run rich, meaning they require more fuel to operate. 1 3 of 4 Go to page. I always wait until the needle just hits under 1000RPMs before I put it in gear and drive Listen to the Corvette C8 Stingray exhaust, cold start and rev its 6. Dec 24, 2023 · Revving a cold engine not only affects the engine’s longevity but also impacts fuel efficiency and emissions. Sep 21, 2016 · I can see not revving it immediately, as you want oil pressure to build up, but other than that, what would be the agent of possible harm in revving a cold engine? Does it have something to do with an issue other than oil pressure and oil flow, e. Some people rev the engine on a cold start, thinking it will warm up the engine faster. As the engine warms up, the oil becomes less viscous and flows more freely, ensuring that critical engine components are well-lubricated. Best practice is to keep the revs and load low until oil is up to 180*f or so. This week it went back to the Dealer to correct the problem. 2L V8 LT2 engine. It will warm up much faster than sitting at idle and is better for the engine. However, during a cold start, the oil is also cold and viscous, which means it flows less efficiently. I was under the impression increasing the revs first thing on a cold start increased engine wear and not a great idea until the engine gets around the engine? Feb 21, 2024 · One possible cause for this problem is a faulty cold start sensor. 4 hemi daily driver ! Nov 24, 2017 · When you start any fuel injected engine, warm or cold, engine should REV, because IAC Valve is open all the way, 1,500rpm REV is not unreasonable If engine is cold RPMs should drop to 1,100 or so after this REV, and then slowly drop to about 650rpms(manual trans) over the next 5-8 minutes until engine is warmed up Should you let your car idle to warm up? Or should you just get in and drive? Explaining what is best and if cold starting your engine is bad for it. 5 manual engine would shoot to about 1600- 1850RPMs and then very slowly decrease and halt around 1200-1000RPMs after about 5-10 minutes of warmup. 6. May 27, 2025 · Avoid revving or racing the engine when cold. Engine parts are more vulnerable during the initial start-up, underscoring the significance of heating the engine gradually before subjecting it to high RPMs. as you are throwing a lot of friction at colder and less lubricated parts. bike will stall out and then not want to idle even if revving while attempting to restart. The fuel trims change up as soon as it starts revving up. Here's a video of what it does. The motor revs up and down sporatically for 20 seconds or so. Apr 25, 2025 · For instance, during a cold start, the engine requires a richer fuel mixture and a higher idle speed to warm up effectively. ) My car has 82000 miles. Post ECU all good as far as running and performance but every single cold start since then this over-revving has happened. / 04 Chrysler T&C /'11 Dodge Journey AWD 3. Jump to Latest 41 - 60 of 67 Posts. The cold start sensor plays a crucial role in providing the necessary information to the engine control unit (ECU) for adjusting the fuel and air mixture during cold starts. If you have an older car with a carbureted engine, do not forget to close the choke valve during cold starts. joaoelvas · Registered. I started the car as per normal, no throttle required, but it immediately soared to 2000rpm for approximately 10secs before slowly dropping to just over 1100rpms and pulsating as shown in the video with absolutely no throttle input from me - and no, I haven't got the floor mat over the pedal. If it is really cold then let it run for a minute max and then drive off. It has now 78. Remote starts Mar 15, 2020 · The computer (ECC Rev Limiter) won't let you. Apr 18, 2016 · on my 2015 xg750 it is iffy at times. Is this how the car should start? Today I got into my Ford wearing flat sandals and turned the key to start the engine. Show Printable Version; 01-29-2016, 03:30 PM #1. Revs for about 5 minutes then slows down. Aug 16, 2008 · My 07 st1300 when started cold revs to over 3000 rpms this occurs at 20 degrees and sometimes at 55 degrees. Oil pressure is highest when cold. No your neighbor is a moron for free revving his subaru while cold. As long as you were running good synthetic oil, should be ok. 460CID, 6-71 Weiand Blower Aug 15, 2019 · Over-revving at cold start-up. The perfect symphony for AMG fans! Jan 14, 2020 · is it going to immediately kill a modern engine on good synthetic oilno. Dec 16, 2004 · In fact if revving hurt the engine so much when cold, then the high idle every car has on startup would be killing the engine every time you start the engine (just a little comment, I know the high idle is not that high)still I have read so much here where people think the engine needs to be babied until full operating temp, however in real Feb 21, 2025 · Feel the thunder of the Mercedes C63 AMG! Watch as the 6. com is an independent Toyota forum for owners of Toyota vehicles. expansion of parts via heat to achieve optimum tolerance? Nov 15, 2022 · I bought a second hand 2018 Mazda CX-5 2. etc). Frequently Asked Questions Many drivers have questions about normal cold engine operation and revving. This is true, but it also destroys the engine in record time. Feb 4, 2020 · So when I cold start my OB it goes right to 1800 RPM and it takes it several minutes to drop back to a regular idle (up to 3 minutes here in our mild SC winters). Joined Aug 15, 2019 · 41 Posts #41 May 20, 2025 · Revving under normal circumstances is a natural part of engine operation, and is to be expected. Give the engine enough time to burn off moisture by taking longer trips. How do I enable the cold start feature on PS5? To enable the cold start feature, make sure your game and console are updated, then apply the HSW Performance upgrades in Los Santos Customs. 2012 dodge charger srt8 with mid muffler delete. Cold, thick oil doesn’t lubricate engine components as effectively as warm, thin oil. Reality: Revving a cold engine can cause unnecessary wear and tear, as the oil hasn’t fully circulated yet. com/blog/2022/01/listen-to-the-juicy-c8-c Nov 25, 2017 · I know that the car is supposed to do this until the engine reaches operating temperature if the weather is cold, but it behaves this way even if it’s a balmy 80 degrees outside. Revving the engine exacerbates this issue, leading to increased fuel consumption and higher emissions. kinda like the same for me but backwards. mate from work comes over and blips the throttle about 2-3000rpm. All oil when cold, especially negative temperatures, flows very slowly and the higher you rev it, the more pressure you are causing to seals wear surfaces and bearings. Feb 5, 2023 · Preparing to start car__foot on brake pedal but without realizing it, sole of shoe/boot is also slightly pressing gas pedal__start car, engine revs higher, faster than usual__nervous, pump brakes (do RPMs go even higher?)__RPMs revving, nervous, remove foot from brake pedal (which coincidentally also removes portion of shoe/boot touching gas pedal)__immediately place foot back on brake pedal Jun 3, 2015 · If it was cold and he had any frost on his windshield, he'd start his car and instantly rev it to the stratosphere. Could this be related to the fact that I have the mafless tune while still having a physical MAF sensor? Could it be a vanos issue on cold start? I'm installing ISTA so I can run vanos actuations on my car. Firstly, it forces the engine oil to circulate rapidly when it is still thick and hasn’t had a chance to warm up. By following these best practices: Avoid revving the engine immediately after starting. Dec 3, 2023 · A remote start is a good choice if you live in a region where temperatures get cold but not cold enough to cause engine coolant to solidify or become too thick to function properly. Oct 26, 2014 · I have a V6S, and when starting from cold the engine does rev high briefly, but it is not excessive. the truck had 2 miles on it when I got it. May 13, 2025 · The cold start feature in GTA 5 makes your car's engine rumble to life when you start it, adding a layer of realism to the game. Revving higher won't destroy the engine, but it's somewhat more likely to cause problems far down the line. i'll just start by saying ITS ANNOYING! when I first got this truck, 5 days ago, I must have started it many times and never heard this startup annoyance. Pushing cold valves with revving can Feb 3, 2016 · My 2011 X5 xDrive35i Premium sometimes fluctuates between 250 RPM and 500 RPM above the normal idle level ten seconds or so after I start it. Copper Member. I know this is normal operation for a COLD start. 4. 000 km. . Oct 21, 2018 · 3 seconds of revving on a cold start isn't going to "remove" much carbon. xiafjn jvlfhqcp dslt eey zmydoueq rnhw wybz reqvyk rpfpv qio