Engine Revving Up and Down at Idle FIXED 

I’m no help on a Diesel engine unfortunately. Hopefully someone out there will see your question and can help. 🤷🏼‍♂️

I’m not sure how this guy diagnoses it

My saxo was revving itself and it wasn’t into any depth and wasn’t worth a twelve minute video to figure it out , go into a dark place with a torch get one of those small water bottles that’s you’d use to water plants , put it in mist mode and spray it at the engine and shining the torch at it , you can see where the waters being blown as mist and diagnoses where the air leak is , talking about gaskets and stuff whatever it’s just an air leak lol

@@thistownfails I think it’s a problem with my EGR

@@skenginmyblazer8190 I got a fabia vrs my egr is blanked off, if the car is revving it’s self it’s because a pipes leaking and it’s getting more air than fuel

Thanks! Glad this helped. 🙌🏼

Glad it helped! Good find too! Thanks for commenting that could help someone else out as well. 🙌

Haha. Thanks! I remember how that felt. 😅

Glad to help! 👍🏼

Thanks for the kind words! 🙌🏼

Truth!!! 🙌🏼

Me too!

It’s sucks but I hope that’s what it is! Once fixed that car was solid for another 80k miles. Sold it for what paid for it after using it for years!!! Always a good goal for cheap used cars.

Hey James, did you ever find out if it was the intake gasket on your 2.0 zetec? I’m having the same issue

@@justinrandolph7462 It was the TPS on the the throttle body. Not one throttle position sensor i purchased online, at part stores, and finnaly from the manufacturer themselves, not one worked. Transmission keeps shifting back and forth trying to find the shift points and a constant high standing idle. I've changed out every part and gasket that alot of well meaning people claimed was the problem and none of that stuff worked either. The only thing that fixed the problem was a used part at a junkyard that came off an identical car. Problem solved, now all that's left is to find out why all those new parts didn't. I was told that Ford made changes in the original design of the(TPS) made for automatic transmission 01-02 Focuses. These changes unfortunatly make the part function improperly.

@@justinrandolph7462 Not the gasket. The problem was the TPS on the throttle body. The transmission constantly shifting and the high idle. I finnaly located an exact model car like mine with an automatic transmission in a junk yard. I took the whole throttle body, TPS still attached, off the junk car and immediately put it on mine and without doing anything else I climbed in and started it up. Problem solved! Everything back to normal operations again. Im convinced that every one of these TPS parts that I have purchased over the years from different parts stores, including the factory itself, are actually the identical looking manual transmission part instead. Considering that I went and bought both parts and put them on my car one after the other and got the same messed up results as before with the high idle and sporadic shifting with the transmission. Car went back to running fine again once i put the junkyard part back on.

W. M be Pm

I’m hook throttle boody?

Thanks man! I’m no mechanic, but I’m learning as I go. Hoping to help others do the same.

Awesome! Well, not that you had car trouble but that this helped! 😜👍🏼

Yes! Thank you!

Thanks! Glad it helped.

Thanks man! Hope this helps you resolve yours too. 🙌🏼

What was wrong with your 2005? I have a 2005 revving as well

Thanks man! Appreciate the kind words. 🙌🏼

Thanks man! 🙏🏼🙏🏼

Fathers are important

Almost as important as Mothers. But it takes both to win the game sometimes.

If rather have a good mother than a good father. Because I did Haha p.s. make your daughter fix the car. Opportunity missed

Yeah same but I'mma check the gasket tomorrow and see if it work

Thanks man! Means a lot. 🙌🏼

Glad I could help!

Glad this helped.

Fake it till you make it. 😜

Nobody is the best at something the first few times they try.

The fix is always the last thing you try! Haha. I was hoping it was an easier fix, but I did finally get it! 👍🏼

Hahaha. Good one. Yup same engine. 🙌🏼

Thanks man. This one just about had me stumped. 😱

It’s not a fun repair for sure but so satisfying to be able to fix things yourself. Glad this helped. Hope you identify and can get it resolved! 🙌🏼

@@troysgarage oh for sure its not fun, my intake is at the front so luckily i dont have to go under the car. though i still have to disconnect the coolant hoses/throttle body/ sensors and injectors. Unfortunately i didn't find any issues with the gaskets they look great actually. but i did find dirt on the fuel rail right where the seem is on the manifold, which i think might be actually a crack. damn plastic manifolds. Ive taken it out completely and gone around the seams with some silicone. Ill have to wait to add it back and see if it changes anything!

Good find though. Yeah those plastic manifolds are a little too cheap! Company saves money while the consumer pays the price later. 🤷🏼‍♂️🤦🏼‍♂️

Thanks man!

That’s the goal for sure

Hope this helps to resolve it. 🙏🏼

Guilty as charged! 😜🤷🏼‍♂️

Haha, that is an imitation of the tach needle.

QAJUSSI your welcome. Hope it helps! 👍🏼

Give it a go my man. You'd be surprised what you can achieve following videos like this on RU-vid. There's almost certainly gonna be detailed ones for your exact car too!

Well said! I also use videos to learn. In fact that’s how my channel got started. I watched a video and said to myself “I could do a better video than that!” Then I made myself prove it. Haha. I’ve gotten better with time and experience too. Do’t be afraid to try! 🙌🏼🕺🏼

@@troysgarage thanks mate, found this one real helpful. Just got myself a Yaris Verso (big ugly Vitz/Echo I think it's called over there) for my family as I've spent the past year working on my own Toyota's thanks to RU-vid vids. Paid very little for it, it's quite beat up but it's got pretty low mileage and is solid. Took a few hours to fix little issues which cost nothing to fix (fuses, dodgy cabling, and pinching a few things off an old Yaris I've got laying around I'm using for parts). I've got a p0505 which is the idle air control valve. I cleaned the throttle body while on the car, and found somebody had taped over the hole inside it lol. I guess this was a temp 'fix' in the past?! Removed the tape and sprayed the TB which has caused it to start revving between 1500-2000rpm at idle. It was just over 1000 before and never changed. I figure I've gotta get the TB assembly off the car and take a closer look, maybe check the wires with a multi meter too in case they're faulty. The idle air control valve probably needs a good clean and test itself. I never even thought of disconnecting it and starting the car til I saw this vid to see what happens so I'll try that in the morning. It's a bit of a bitch to get at, unlike the 1litre parts car I've messed with which had an acre of room either side of the TB. I remember the anxiety the first time I did an oil change, then filters, then plugs.... Then I realised how much I was actually enjoying it and as long as you've got time set aside (or a spare car ;) ) you're never in a rush and finding solutions to problems is very rewarding, especially when it's not costing you a fortune. Done brakes, loads of stuff under the hood and a fair few electrical bits and pieces since and feel more confident every time. With RU-vid and a bit of time anyone can work on their cars!

Awesome!!! 🙌🏼

.

Not the best thing to do with a exhaust leak

The issue is a vacuum leak not an exhaust leak. That said…. this type of testing should be done with caution. You are doing it at your own risk.

Spray water bottle with a heavy stream will be safer, you can hear it suck into the hole and car will sputter slightly. Slight steam clean of piston won't hurt it or use a smoke machine, some are near $100 now

@@menace1485 ... my smoke machine cost me $ 4.19 at the Smokers Shop. 1 corn cob pipe !

Thanks! That means a lot! 🙌🏼

🤣

Great tip! But.... that didn't solve my issue. I chased it with parts and cleaning until I got to the root cause - intake manifold gasket.

You ain’t kidding!!! Thanks for the kind words! Means a lot. 🙌🏼

Thanks for the kind words. Glad this has helped so many people! 👍🏼

Yup I underestimated how messy this would get. It escalated quickly! 🤷🏼‍♂️

We’ve babied this car along. My daughter is still driving it today. However it’s getting too scary for her now that she’s got a baby, it’s about time to upgrade and scrap this one. It’s been a great little car! 👍🏼

Thanks so much! She was super happy to have her own car back for sure!

Glad to help. 👍🏼

Do you happen to be my neighbor? I just moved to a new place and my neighbors car revs up and down and up and down and up and down every morning. I was wondering why they were doing it, maybe to warm it up quicker. But I realized the sound was too consistent. 😂

@@sbfguy7793 probably not i sold that car like 2 weeks ago

🤣🕺🏼

The process is very similar but bolt locations would be a little different. I believe in you! Take a chance and save yourself a bunch of money. It’s very satisfying to complete a job like this on your own! 🙌🏼👍🏼

We were down to bare metal on the top side of the wheel. I finally put one of those cheap covers over it. Maybe should have done that years sooner and saved the wheel. 🤷🏼‍♂️

WOW!!!! That was a lucky find! Thanks for sharing that tip! Goes to show that even the simplest thing can cause our fancy cars to misbehave!

@@troysgarage I don't knoe about luck it took lots of reading and 2 days to find the problem. Tried lots of different solutions before checking the above.

Good call!!!! Sorry if I made it sound easy! I guess the lucky part was finally finding the answer. 🤷🏼‍♂️

How on Earth do i do that with my 2014 Nissan Versa Note?

@@davecrupel2817 Try to Google the engine fuse location, and engine wiring harness to find the dme, ecu, ( All the same thing to my knowledge). Then check the connectors and fuse.

Glad it helped. 👍🏼

Same problem with my corsa b 16v but only when the engine is warm and rmps drops when shifting gears sometimes it turns off.did you fix it?

Hey Nixon, I’m still driving with the problem, I’ve decided to take the head off as well to do valve stem seals, so still need to make time to fix it. I have replaced the tps, icv and map sensors, I would recommend trying that first, and if the problem still persist like in my case you must check the intake manifold gasket like in this video.

@@likebike2 maybe lambda sensor?

That can also be🤔We can always unplug it and see what happens if there is any difference, but it will definitely throw a fault code

@@likebike2 who know it can be many things.i will try with cleaning throttle body and IAC sensor

Thanks man. That means a lot! 🙌🏼

I use the Innova 3120f - www.amazon.com/Innova-BLUETOOTH-Engine-Battery-vehicles/dp/B06Y5MDLX4/ref=as_li_ss_tl?crid=235I50WOX0X45&keywords=innova+3120f&qid=1552885848&s=gateway&sprefix=innova+3120f,aps,293&sr=8-1-fkmrnull&linkCode=sl1&tag=diyhomeandaut-20&linkId=deec17b6cd4a00bcc646b9f149f9a252&language=en_US

The Innova 5023 is also a solid option with a few less features and a more affordable price - www.amazon.com/Innova-5023-CarScan-Reader-Freeze/dp/B076N5V6SN/ref=as_li_ss_tl?keywords=innova+5023&qid=1552885893&s=gateway&sr=8-2-fkmrnull&linkCode=sl1&tag=diyhomeandaut-20&linkId=5f7fccb1c575aeed81bcc0c96b2eb1cc&language=en_US

Yup, that’s exactly what this video is all about.

So like. How do we fix this?

@@adrianprinsloo5930 - Reread my post again and again. You will know HOW to fix it after reading !!! *

Hope you find the issue. This wasn’t very fun. But satisfying once it was fixed!

Yes it did. I might not use the term “wildly” but it was a noticeable change when AC kicked on.

I appreciate that

Bumping sound could be warn motor mounts or bushings on the control arms (assuming front is where the sound is coming from). Check those things first.

Try replacing bushing first it's super cheap and really common to cause a rather weird bouncing and cranking sounds

One check at a time. I’m much better now at diagnosing these kinds of issues. I used to just throw parts at problems till they were fixed. (Parts cannon! Hahaha)

Let’s face it your motor sounds like it’s unhealthy anyway

Glad this helped!

Automatic is boring! 🤣

chanrio1308 try cleaning/replacing MAF sensor

Step by step till you isolate the issue. 👍🏼

Thanks. She’s a good kid and worth it.

that a nice one works with weed smoke XD

I used the throttle body cleaner method. Crank it up and start lightly spraying around the hose connections on the intake manifold. The vehicle will rev up if the cleaner gets into the manifold allowing you to pinpoint the leak

Wow! Thanks for the amazing compliment! I’m blushing! 😜🤘🏼

Truth!

what does it do if it finds a leak? different color?

No it revs consistently at when sprayed on that spot.

If no codes then I suspect a vacuum leak. Check all the hoses for cracks first then start looking at gaskets. Hope this helps.

This is it right here: amzn.to/2YAll7u

Check fluid levels in the trans. Also visually inspect the fluid and smell it. It should be light red in color and be almost odorless. If it’s dark brown and smells bad you have likely burned your clutches.

You aren’t wrong. But even the older cars will last a long time is you take care of them.

They did nothing like Toyota. Calm down with this Toyota pride. Hyundai dorsnt make boring ass cars just like Toyota does. They cant even figure out how to bring back their one and only legend car, the Supra. They had to ask BMW about that.

Can’t argue with the Supra comment! I was super excited when it was announced, then disappointed when I found out it was a rebrand! They could have done something epic and blew it! 🤷🏼‍♂️🤦🏼‍♂️

@@RBZ06LT6 you cant be serious right now. Just like in the 70s toyota went after bmw and mercedes, in late 90s and early 2000 Hyundai went after Toyota. Their Equus was an identical replica of Lexus LS, for instance.

Glad I could help

I don’t have any idea. Sorry. Hopefully another viewer can chime in to help out.

Check for vacuum leaks first. Parts may not solve the problem and some leaks are free to fix.

I'm having the same problem with my Honda civic lx! Were you able to fix the problem?

Please let me know how you fixed the problem on the 2000 Honda Civic LX!

If not the gasket it’s definitely a vacuum leak somewhere. Look at any vacuum lines and look for cracks or loose connections. If all that looks good it could be the intake manifold gasket.

So was it a programming issue? You’ve got me curious. 🤷🏼‍♂️

@@troysgarage sorta! The shop ran their diagnostic tools on it and determined I had a bad ECM/PCM. I ordered a new one flashed to my VIN for about $150 and got it installed. I had to do a Crank Position Relearn procedure (which you’re supposed to do if you install a new ECM and/or replace your Crank and/or Cam sensors - I did all of the above) via my ODB scan tool and after that my idling problem seems to have cleared up.

Crap! That’s no good. Did it start suddenly like out of the blue or get worse over time? Bad gas maybe? Add some fuel treatment with your next tank? I’m grasping for something that might help. Sorry brother! 🤷🏼‍♂️ If you figure it out reply back so we all can learn from it. 👍🏼

@@troysgarage Nope it's been going on for years. I can't remember when it started but I know when it did, I thought "Vacuum leak" or "sensor" It seems like it came way back when my radiator was leaking. Then the car sat for 2-3 year's Everything that had caused a Check engine light has been fixed. That only consisted of the Cam shaft Sensor. But I have replaced every sensor besides the O2's I love this Car I always wanted a Chrysler 300m and I finally got one that has otherwise been such a great car to me. Never ever left stranded 167000 - 203000 miles now and most repairs have been preemptive maintaining and of course the Idle.

Well, at least it’s a reliable vehicle. Seems more like an annoyance than a break down. 🤷🏼‍♂️ Maybe someone else will see your comments and have an idea you can try. Sorry man! Hope you can find a resolution! 🙌🏼

issac joseph I love to fix things on my own. Learn new things! Good times!

This valve will get in Ali express for 8 dollar..I purchased and is now very nice..old one i kept safely..

Please do let everyone know. Hope this video helps.

Have you solved this and how did you solve it?

Depending on the year of the vehicle sometimes they just need to have their idle “relearned”. I fixed a strange issue in our 08 Corolla with a simple re training of the computer idle. Maybe it’s just that easy. Google search for idle reset and you make/model. Hope this helps.

Glad it helped!

Thanks 👍

Check engine light did come on, I mention the codes I got with mine. I've heard others say they didn't see any codes or lights, just a rough or inconsistent idle. It depends on how bad the air leak is, mine was pretty bad!