How To Diagnose Stuck Open EGR Valve

[@dereckc9469]

so no code on a vacuum activated is pretty common? my mitsu I tell mechanic it feels like egr stuck open shakes when idling and stalls occasionally he tells me there would be a code and tries to and sell me a fuel pump saying its low fuel pressure, w/o testing pressure. Car feels exactly how my cab felt when the dpfe went but I got a code. I would have went after egr first just because the way it feel thanks, I will first try cleaning egr

[@brandonhunnewell706]

If i hooked up the vaccuum hose wrong to the EGR valve, would that also cause it to stick open? 97 Mazda MX-6. Engine stalls and smeling fuel

[@amana1480]

Is it possible to get an intermittent fault with the egr valve electric motor? Sometimes I have fault codes, sometimes I don't... I opened the egr valve and it's not sticking at all.

[@laapulsford]

Great video. I have a question, how do you test for a closed EGR valve? On a diesel common rail engine I have a problem with detonation/know once the car is normal operating temperature and occurs mainly between 1200 and 1900 RPM. When the car is cold, the car runs perfectly. I have heard that a closed EGR valve can cause high cylinder temperature and this can cause knock. Your thoughts would be really appreciated. Thank you.

[@irishlad7458]

Buddy got a ranger UK tdci 07 I have a vacume type with a 3 pin Conector on top will my computer tell me if my egr is not working I got a bit of a rough idle at moment bit of white smoke I cleaned my egr in Jan so I know it's not clogged so my question is if my light on dash not on is it working correctly

[@TheVintageEngineer]

One thing to add is you need to have fuel system status PID up on the scanner when viewing fuel trims. Need to know if you are in open or closed loop.

[@moshazza5684]

hi. i have a skoda 2,0 tdi cffb engine. it cut out on me in morning. wouldnt start only cranked. i got it started with easy start spray. and it ran ok drove ok for half a mile. went to start it again later in evening and it started but as soon as i revved it to move...it cut out and wouldnt start again. re started with spray again. iv been told my egr is clogged...do these syptoms seem like that to you

[@amana1480]

Sounds like the fuel pump in the tank? What was it then?

[@moshazza5684]

@@amana1480 the throttle body was stuck in closed position

[@amana1480]

@@moshazza5684 Interesting

[@moshazza5684]

@@amana1480 I have replaced the throttle as the cogs are known to get worn which causes it to stick. Also I watched a video on here and rotated the nozzle going into the inlet 180* . And also I have deleted the egr using the emulator kit off eBay..it was £122 and cheaper than mapping plus d.i.y job. Car running nice since. No lights and dpf still does re gen

[@jordinpagel5976]

So I am working with a 2007 chrysler town and country and it is giving me a multiple random mifire error code P0300. The cars engine shakes like made and the engine light is flashing. I think the culprit mist be a stuck open egr valve. I started the engine and while running disconnected the EGR valve and noticed no change in the running engine. I also reconnected it and again no change. Am I right to assume the egr is stuck open given these observations?

[@kyhomegarage3430]

Jordin Pagel most likely you have ignition problem. Change spark plugs and wires firs

[@cbass0684]

​@@kyhomegarage3430your advice is false and original poster is correct. He's misfiring because of a lean fuel mix caused by a stuck open EGR that is allowing too much unmetered air inside.

[@SouthMainAuto]

remember there is stepper motor controlled one to with no feedback circuit too :) Subaru likes to use them. Great video BTW

[@kyhomegarage3430]

South Main Auto Repair thank you for info didn't know that I have learned so much from you .Cheers.

[@jknowledgenet2748]

would this cause any fluid leakage from the exhaust? and the temp light to come on when sitting? I know what I described sounds like a head gasket but the truck runs excellent as long as I'm driving,I put 2 to 3 hours of drive time everyday on the vehicle without issue unless I leave it idle

[@kyhomegarage3430]

I would check coolant level first and operation of your cooling fans.

[@timoverton5137]

I was having this issue with my Ford Ranger and it turned out being the the water pump fins we're completely rusted away and not getting the proper water flow at idel or low speeds.

[@DirtyMikeHoncho]

Best way to check for broken head gasket is a coolant system pressure tester

[@1menwolfpack550]

Do you hold vacume on the pump or you just give it a little pump and than release the air to see if the egr stays open?

[@charlesrevealed1447]

Hey dude I’m in Kentucky with a broken down 2001 Toyota Tacoma. Where are you? Wanna help on a holiday weekend? 😂 thanks for the video

[@kyhomegarage3430]

Danville 40422 where are you

[@johnlira3316]

Can it cause white smoke from tail pipes?

[@ac_tv2050]

Yes.

[@Photostudioww]

Egr valve is tricky. 1997 Camry Engine shakes hard enough to rattle the hood when it's in drive and idling. I know vaccum leak raises the rpm and Open egr lowers the rpm. The engine also was going below normal idle in park. No check engine light. What I found was the egr valve had enough pressure to seat the pintle but not enough pressure to hold it closed when exhaust pressure was present. Check my video to see how I tested it. 👍

[@yusuihang]

Do you have any concerns about the LTFT being so different between bank 1 and bank 2? I have M112 engine on a 1999 E320. My bank 1 LTFT is always 1.6% to 3.2% lower than bank 2's--example: bank 1 LTFT 3.9%, bank 2 LTFT 7%. I'm trying to understand why this is so. I have some hypotheses, but do you have any thoughts or concerns about this? Thanks.

[@kyhomegarage3430]

yusuihang That is such small difference I would not worry about. For 1999 car fuel trim of +/- 10% is great.

[@macknumber9]

Probably something very minor like a fuel injector that is partially clogged and is just not spraying exactly like the ones in the "good" bank

[@arthurfricchione6614]

Ramon know video has been out a while but I was browsing around found it and watched it. Very helpful and informative enjoyed. 👍

[@kyhomegarage3430]

Thank you my friend.I am glad it was useful. Cheers.

[@DIESELB1GV8]

Vidim da radite dosta auto dijagnostike pa bih vam postavio pitanje. Inace na "idle" rpm-s su niski i vakum otvara egr tako da je on i ispravan otvoren(brze grije motor/stedi gorivo)..e sad prilikom dodavanja gasa...egr se djelomicno i zatvara a na radnoj temp. je egr full zatvoren..Eh sad vas test se bazira na hladnom motoru i usisu?Nisam razumio sta je poenta, logicno da je otvoren na idle(hladan motor) to moze i maf vidjeti da manje zraka uzima. Ili ja grijesim u necemu?Pozdrav.

[@kyhomegarage3430]

Zdravo kolega. Kod benzinskih motora EGR ventil je potpuno zatvoren na leru (idle) i na punom gasu (WOT). Ako je ventil otvore na leru stvarat ce problem kod rada motora. Kod dizel motora je drugaciji princip rada EGR ventila mada ja nemam iskustva sa dizelasima. Hvala

[@DIESELB1GV8]

KY Home Garage KY Home Garage Hvala na odgovoru, da jasno benziski motori koriste egr drugacije. Sve prohvale za vas rad, u klipovima ima dosta detalja, kao i kvalitetne opreme za vidjeti. Srdacan pozdrav.

[@thegettingoveritguy7266]

Great job awesome video!!!!!

[@rubenp8750]

The temperature gauge trick is great.

[@kyhomegarage3430]

thank you my friend

[@LeSiZmOr]

Excellent video. Helped me narrow it down. Very good! /! Thanks

[@kyhomegarage3430]

Thank you my friend. I am glad this video was useful. Cheers

[@chrischoin7402]

ROBIN WILLIAMS !

[@christravis481]

Good video, thanks.

[@alainjimenez4584]

Yeah, that helps a lot mate.. Cheers

[@timothykeith1367]

My '96 Civic won't start when the motor is warm. Has fuel, spark and compression. Timing belt replaced 5,000 miles ago. Could a stuck EGR valve be the problem? Sometimes it won't start when the motor is cold, but never when the motor is warm.

[@kyhomegarage3430]

Did you actually check fuel pressure with engine worm?

[@timothykeith1367]

@@kyhomegarage3430 I only checked that it was fuel pressure. Car has been in the shop for many days so I can't do anything with it right now.

[@user-ju3od5gy5q]

Thanks for the information. Helpful.

[@catdakman1273]

EGR stuck open = ruff idle.

[@amana1480]

EGR is meant to be open at idle

[@AdammP]

nice video, this is proper diagnosis instead of just throwing parts at a car, good to see somebody applying a brain and looking at long and short term fuel trims to account for unmetered air. hope some people learn from this, if you have the knowledge you can pinpoint exactly what is wrong with a car without even getting your hands dirty . thumbs up

[@kyhomegarage3430]

Virulent thank you my friend I am glad you like it. Cheers

[@Archangel0804]

I know how to diagnose a bad battery in a smoke detector...It beeps repeatedly throughout a KZbin video Hahaha. Good vid but that is really annoying..

[@keesanka1]

No kidding replace the damn thing, drives me nuts.

[@Photostudioww]

Hahaha

[@markforeman3101]

EGRV not working right will you get water in your oil?

[@kyhomegarage3430]

Mark Foreman no EGR only recirculate exhaust gases back to intake manifold.

[@85Studios]

@Mark Foreman, I think you might be thinking of the PCV Valve, The PCV valve usually sits on the Valve Cover and is generally also controlled by Vacuum, When it fails, it can also act like a gigantic Vacuum leak, in other words it will allow unregulated air into the system via the vacuum line attached to it, which will cause the typical codes System too lean Bank 1 Bank 2 on V8 Engines, or System too Lean Po171 and/ or PO174

[@rrmech11]

Great job

[@kyhomegarage3430]

Richard Gill thank you my friend. Cheers

[@markferraro5250]

Thanks KY man excellent

[@kyhomegarage3430]

Mark Ferraro Thanks Mark I am glad you like it. Cheers.

[@kyhomegarage3430]

Mark Ferraro Thanks Mark I am glad you like it. Cheers.

[@wesleyhunter501]

And uhh then uhhhhh

[@wickedhemroids2811]

Uhh you know uhh see uhh amd uhhh when uhh....

[@kyhomegarage3430]

Gordon Freeman uhh popusi hmm kirac