High rev on startup

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August undefined, 2024

WebDec 22, 2009 · At startup, it starts normally and then will rev up to 2000 RPM and slowly rev down to around 700 over the course of about 2 minutes. Sometimes it's slightly rough. Once the motor is warm it idles normally. I'm thinking this is sensor related. MAF or O2 but I'm unsure, whatchu guys think? F FSWerksVP Registered Joined Aug 23, 2000 24,824 Posts WebFeb 12, 2011 · The high rev is pretty much always present with a cold start. It is normally a combination of the idle air control valve and enrichment maps in the ecu. Once the coolant temp sensor reads that the engine is heating properly, the ecu lowers the amount of fuel it sends to the engine and the iacv closes. 1 - 8 of 8 Posts

SOLVED: High Idle at Start Up - Fixya

WebMar 15, 2010 · First start of the day, it would rev to maybe 1200 right after start, then taper off to around 800 which I think would be normal. Drive for a few miles, fully warmed up. … WebMar 7, 2009 · Maintenance Shop - revs high on start up - I was wondering if anyone knows why my truck always revs high on start up no matter what the temp its over 2000rpm for … lpa thiberville

High Engine Revs on startup Tacoma World

WebApr 30, 2009 · Anyway Hd that are injected start at high RPM and after heating up the idle kicks down. You have a Temp sensor for this, which sounds like it is bad. I can not believe … WebMay 11, 2024 · A car could have a high idle at startup for a few reasons including to control for emissions while the catalytic converter is warming up to operating temperatures or to … WebMar 16, 2024 · Your car could rev high when you start it if you have a dirty throttle plate, or a dirty idle air control valve. The throttle body controls the amount of air that enters the engine and when it gets clogged, the fuel to air mixture is thrown out of balance and your … You can clean your car engine with WD40 without damaging it. Cleaning your car … lpa thiene

High RPM on startup Focus Fanatics Forum

WebSep 1, 2024 · 50 Posts. Discussion Starter · #1 · Feb 2, 2009. Newbie question on the 5.7l. Bought the 08 on Saturday and had to have a new battery installed. Now when starting the vehicle it revs to around 2,200-2,500 RPM then VERY slowly idles down. 2-3 minutes it is down to 1,800 RPM. Will this change after a few starts and it reprograms itself or is ... Nov 21, 2016 · lpa trading limitedWebJan 28, 2011 · High revs at startup while it's dry up where all this stuff failed. Ford says this type of failure can be a result of using 3rd party oil filters (fibers break off and clog things) I've always used motorcraft filters. I did buy the car used and have no idea what the guy used before i bought it. lpath therapeutics inc

"WebMay 1, 2011 · 2003 Mercedes S320 CDi (W220) Joined Apr 17, 2009. 340 Posts. Discussion Starter · #3 · May 11, 2010. Hi and thanks for the quick response. I would be happy with +-1000rpm on startup - think that is about what it was. Car is warm at the moment, just started it and it went to: Neutral : +-1500. as it engages : +-1800. " - High rev on startup

High rev on startup

WebHow to STOP Honda engine High Idle revving surge at COLD start up, Its NOT IAC Wise Monkey 5.58K subscribers 29K views 2 years ago Honda 4 cylinder engines are made to … WebDec 9, 2006 · 2) The high cold start-up RPM is due to your automatic choke doing probably what the Toyota engineers designed it to do. 3) The higher RPM is required to burn up the …

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WebJan 30, 2014 · Usually when an engine runs higher RPM than it is set for, it means extra air is entering the engine from somewhere. Using a spray water filled bottle, go around seams and also spray vacuum lines and the EGR pod while the engine is running. Any openings will draw in the water and affect RPM. Then you will have found the leak.

WebNov 3, 2013 · No it just revs up kinda high on start up then runs mostly normal for the rest of the time. However, I was going through a parking lot earlier and I took my foot off the … WebNov 7, 2004 · 98 Jetta 250,002k. Oct 29, 2004. #5. My 98 TDI began experiencing some higher revs during startup and disappeared shortly after startup. I also experienced some power loss at highway speeds. VW mechanic indicated that the aging (but not worn out) belt stretched and created enough of a timing issue to cause those issues.

WebSep 25, 2012 · The problem is when I start it, it revs too high. Only does this on start up and runs good otherwise. It revs up to @2300 and stays there for a couple seconds, then drops to around 1300 or so for a bit when cold, then down to around 750. If its warm or hot it revs up to @2300 for a couple seconds and then down to 750. WebJan 7, 2006 · The high idle after start up is one of Toyota's way of reducing emission. A warm engine emits less emission than a cold one so Toyota and other manufacturers put in this feature to help get the engine to operating temperature quicker and thus reducing the higher emission that would have been emitted if the engine was still running cold.

WebJan 18, 2024 · The reason for the high RPM on startup is likely excessive air, either from a throttle body or other intake leak, sticky TB or IAC, or the PCM thinking that the intake air and/or coolant temperatures are ridiculously low, thus adding steps to the IAC position.

WebSep 6, 2024 · This seems excessively high for a cold engine start when the outside ambient is over 60F. It also makes it very difficult to back out of the garage without power breaking … l. patrick gray wikipediaWebOct 20, 2010 · 4.7 HO still revs too high on start up. Even put on another new idle motor. That did not help. Seems to work okay for 3 or 4 days after having the PCM flashed but … lpa thatchamWebJan 12, 2004 · Instant high revs on start up = damage? - SjB {P} Current petrol Volvos on the P2 range of floorpans are designed to rev instantly to a moderate extent on startup, to help reduce emissions and extend the life of the cat. My V70 typically spins instantly to 1400 RPM, holds for a second or two, drops to 900 RPM, then drops to the normal tickover of … lpa thrombusWebJan 2, 2024 · My 89 F250 4.9L with a 92 ECU will rev up to 1800RPM for about 10 to 20 seconds then drops down to normal. When I start it, I pop the gas pedal once just after it starts and the engine will drop the high idle. I think in 91 or 92 Ford started to make these engine HIGH idle like that as the older ECU (89) did not do that. l. patrick gray watergateWebNov 25, 2024 · on November 25, 2024. When the engine is started for the first time each day, the engine revs way up, and the RPMs gradually go down to normal idle speed. If the engine has recently been started and the engine hasn’t completely cooled off (I.e, it’s been sitting in a parking lot for 30 minutes) it starts normally. lp / atm pty ltdWebOct 15, 2014 · On startup, the RPM will climb up to 2,000 and then idle back down to around 6oo. It doesn't matter if the engine is hot or cold. Engine is the 4.7 in a '99 Could this be a … lpath therapeuticsWebI'm Raul "Rev" Vaughn, an entrepreneur and high-performance consultant. I've founded or helped start over a dozen different businesses in five countries and helped introduce thousands of products ... lpa treatment records