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Short video describing how you might find a leak in an intake manifold using a smoke machine and your scan tool. This is a 2007 Toyota Corolla S with a 1.8L. Very similar to the Vibe and Matrix. The check engine light was on with a P0171 Lean Bank 1 Code. Really common and a really easy fix. Leave your questions in the comments and subscribe to our channel.

49 thoughts on “Intake manifold vacuum leak – toyota corolla / vibe / matrix”
  1. Avataaar/Circle Created with python_avatars Tom Sornpanya says:

    I have 2016 toyota corolla with the same code and same engine. Going to change the intake gasket. Thanks for the video.

  2. Avataaar/Circle Created with python_avatars sam bitar says:

    YOUR TAPE IS A BLESSING TO ME. THANKS

  3. Avataaar/Circle Created with python_avatars girohead says:

    I appreciate seeing the second method as I've heard of that but it was nice to see. Regarding the first soapy water method, was the engine on??? Will you see a leak without engine on? Where did air come out of, ambient? But the second part was good.

  4. Avataaar/Circle Created with python_avatars Omar garage says:

    Gracias por tu hayuda , You can do I can do 👍👍👍👍👍

  5. Avataaar/Circle Created with python_avatars mik an says:

    Excellent video
    I have 1nrfe dvvti
    Low rpm lack of power need to press gas more and sound from exhaust gogogo
    No rough idle
    No codes
    No engine light
    No white smoke
    39mpg atm
    Change spark plugs air filter cleaned throttle body inside out
    Any recommendations
    Its an electronic throttle body can drive 70mph at 3500rpm but lots of noise

  6. Avataaar/Circle Created with python_avatars kramden says:

    Did this problem trigger the check engine light? God damn cheap plastic crap….Cheap but quite expensive I'm sure

  7. Avataaar/Circle Created with python_avatars Aaron says:

    Just get a little pen laser. They show the smoke right away.

  8. Avataaar/Circle Created with python_avatars Doug H. in VA says:

    my 2000 Corolla had this problem and a replacement of the gasket resolved it immediately. Not plugs, coils, injectors, or cleaning the PCV and MAF valves along with throttle body and IAC

  9. Avataaar/Circle Created with python_avatars Little Shop In The Shed says:

    Love these older videos, so awkward compared to the new videos!! Thanks for all the work you do to help us out.

  10. Avataaar/Circle Created with python_avatars Doug H. in VA says:

    A 2000 Corolla is known to have gasket leaking when it is old as a common problem. Inability to climb mild inclines and rough running is odd for a Toyota 1.8L engine. I replaced fuel injectors (rebuilt, warranted set for $130) and coils and got platinum NGK plugs and at last… had the intake manifold GASKET replaced for fairly cheap. Problem disappeared on GASKET replacement after the 3 other things were done. At 275K miles on the odometer !

  11. Avataaar/Circle Created with python_avatars Treaxvour W says:

    The guy using the impact gun while you are filming is super lame

  12. Avataaar/Circle Created with python_avatars Edgar Ramirez says:

    So I might be having the same problem but on a Scion tC 06.I’ve replaced the intake itself and yet I’m still having the same problem, Any ideas?

  13. Avataaar/Circle Created with python_avatars nharp83 says:

    Is it possible a leaky intake manifold gasket would cause an oil smell in the vehicle while driving with the heater on? 2003 Vibe Base

  14. Avataaar/Circle Created with python_avatars JamesAutoDude says:

    Mine ended up being the oxygen sensor. Great info tho!

  15. Avataaar/Circle Created with python_avatars ᗒ╬ᗕ1112223333111ᗒ╬ᗕ says:

    how to fix? does the 1.5 do this? I got a 2007 yaris
    thanks

  16. Avataaar/Circle Created with python_avatars Matthew Cook says:

    Thanks for the great video

  17. Avataaar/Circle Created with python_avatars Danny Vacon says:

    can a leaky gasket cause a hard start

  18. Avataaar/Circle Created with python_avatars Jose Briseno Jr says:

    Its noisy as i dont know what.

  19. Avataaar/Circle Created with python_avatars Neon diamonds Aquaberry says:

    Great video , so in this example it was the valve cover gasket that was leaking ? Could you further explain why those two pids mean in terms of where the leak would be coming from if you have those values ?

  20. Avataaar/Circle Created with python_avatars i ozel says:

    Hi, great video thanks. I have the problem, which I understand is quite common on these, where the revs at idle, surge up & down around 2k revs when the engine is first stated, particularly from cold. I understand that a leaking intake gasket can be the cause of this problem, but my fuel trims look normal (around 0). I was wondering if you know of any other causes of this surging idle problem? Many thanks.

  21. Avataaar/Circle Created with python_avatars wawa Trail Recon says:

    You're fucking awesome bro I just love how you brakes it down thanks for the knowledge bro keep it up 🤗

  22. Avataaar/Circle Created with python_avatars keisha allen says:

    I know this is old but what if short term is 0.8 and long term is 32.2 🤔🤔 ?? It's a 2013 avenger 2.4

  23. Avataaar/Circle Created with python_avatars Mark K says:

    Cool

  24. Avataaar/Circle Created with python_avatars Bigchuck678 says:

    would you get a code without the check engine light on?

  25. Avataaar/Circle Created with python_avatars Richard Gill says:

    👍

  26. Avataaar/Circle Created with python_avatars Duncan Mac says:

    Could see the smoke. Thanks for the video.

  27. Avataaar/Circle Created with python_avatars Mrs. L says:

    They said it’s not my intake manifold and my engine light is still on ? I keep being told I have an emissions leak, but where would that be at, I can’t pay $500 dollars to someone to fix my 13 year old car it’s a 2005 Toyota Corolla CE and I am being told when I go for my smog it won’t pass unless I get the engine light to go off for good? Please help me to learn how to fix my car

  28. Avataaar/Circle Created with python_avatars Sm Ms says:

    SWEEEET VID 🚹, THANK YOU

  29. Avataaar/Circle Created with python_avatars David Smith says:

    sweet I don't have a smoke machine but I do have a $20 bluetooth dongle and torque this should be easy

  30. Avataaar/Circle Created with python_avatars aruna khan says:

    Very good

  31. Avataaar/Circle Created with python_avatars Brusk 397 says:

    👍👍👍

  32. Avataaar/Circle Created with python_avatars Mani Rider says:

    hello dear I have 2003 Toyota corolla I need help you my car is start but won't stay raning I don't no what's a problem everything is good feulpump spark plugs intake air flow throttlebody camshaft senser crankshaft senser everything is put new but same problem I don't no what's problem plz help me dear

  33. Avataaar/Circle Created with python_avatars Jason Argone says:

    I am impressed, you did a great job and you sure simplified the processes of finding a leak. Thanks

  34. Avataaar/Circle Created with python_avatars Сергей Репенёк says:

    Сделал все как на видео только когда собрал забыл вставить фишку и выскочил check engine, но потом все стало нормально когда вставил обратно.

  35. Avataaar/Circle Created with python_avatars sargon khabeer says:

    Help plz. 2005 Corolla with p0171. So far have changed the maf with Toyota oem part. Replaced both o2 sensors with denso. Changed intake gasket. Changed catalytic converter due to a leak. Fuel pressure reads at 49 psi. Removed and cleaned fuel injectors. No vacuum leak. Car running very rough at idle. At idle, short term fuel at 0 and long at 25. At 2000 rpm, short at -4 and long jumps to 40. Any ideas plz.

  36. Avataaar/Circle Created with python_avatars Javier Luis Albaladejo Otero says:

    Very helpful. Thanks for the shared knowledge.

  37. Avataaar/Circle Created with python_avatars dondale68 says:

    Cool Deal! Won't buy a smoke machine for just a few vehicles, but I can get brake kleen or carb clean CHEAP!

  38. Avataaar/Circle Created with python_avatars MarzNet256 says:

    Great how to video. Question: I have a 2006 Corolla Matrix with 73k miles, runs perfect-no error codes. Should I clean throttle body and MAF sensor just to be proactive or should I leave them alone? Thanks.

  39. Avataaar/Circle Created with python_avatars big ed says:

    i have a 2009 vibe gt. is this the vacuum house that will make your breaks very hard to apply?

  40. Avataaar/Circle Created with python_avatars Richard Fertal says:

    You are Awesome…your videos are very helpful!

  41. Avataaar/Circle Created with python_avatars Carlos Mera says:

    Very helpful videos ,enjoy watching it
    Thank you south main auto repair

  42. Avataaar/Circle Created with python_avatars nicholas elias says:

    Just diagnosed a 2000 celica with the same issue!!! Almost was going to call the O2 sensor because it would lag but did the brake fluid test and it tested positive for a intake leak. Good info!!!!

  43. Avataaar/Circle Created with python_avatars Ray Fontanes says:

    Too bad you didn't show us where you were spraying.

  44. Avataaar/Circle Created with python_avatars Geo Jor says:

    great, and the smoke was visible, the fuel trim test was great too, well done…

  45. Avataaar/Circle Created with python_avatars Guadalupe Luna says:

    I'm having a problems with my 2008 Matrix, I really need to floor it to get up to highway speeds or maintain speed up hills. The car does vibrate at idle, not excessively but noticeable, and sometimes when I put into gear it it feels like the engine wants to cut off. The car only has 84,000 miles and there is no engine light on. I was wondering if the problem you mentioned might be causing this.

  46. Avataaar/Circle Created with python_avatars Hawaiian F150 says:

    Thanks Eric  really neat trick. Got a maybe not so easy question for ya. What maker of vehicle scanners do you recommend for the DIY'r who wants live data feedback, on screen code assist and generally a real good quality scanner?Background – I had an Actron CP9580A code reader but I gave it to my son who now lives in Texas. The only thing I don't like about this scanner is that it can't interface with Windows 8 or Win 10 computers. They have said that they plan to release a new driver for the computer/tool for the last year. I'm getting a little antsy waiting for them. I know there is a half dozen or so good scanners out there ranging from wireless to connected and from cheap and erase codes to the lets see what else is going on type of scanners. The latter is my choice for scanner capability level.

  47. Avataaar/Circle Created with python_avatars Geo Jor says:

    good vid…

  48. Avataaar/Circle Created with python_avatars kribby says:

    Very good information  Thanks,   I will try the soapy water,     I will share too

  49. Avataaar/Circle Created with python_avatars yusuihang says:

    Could you also use the scan data readout of manifold absolute pressure to confirm vacuum leak?  I have 1999 Toyota Corolla.  Idle LTFT is rather eratic (up to 15%) but stablizes to 7% and under after long drive.  It seems like maybe there's a vacuum leak at intake manifold gasket that gets sealed when gasket expands under heat?  But the manifold absolute pressure stays at 10.5 inch HG to 11.3 inch HG @ idle (AC off) regardless if the LTFT is at 15% or under 7%.  So, is it possible to have a vacuum leak that does not get picked up by the MAP reading?  Thanks.

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