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Come along with Eric O at the SMA shop as he has a look at this 2002 Buick Regal with a Supercharged 3.8 that he just put an engine in and then discovered on his test drive the car wouldn't get out of its own way! In the video he shows 2 different methods for checking a restricted exhaust.
A video from the Scanner Danner Premium Channel that Paul is willing to share with us as he demonstrates pressure transducer testing! Remeber if you liked this video he did there is a lot more like it in there. Concider subscribing! https://www.youtube.com/watch?v=YookV4zyQdU&feature=youtu.be
More Scanner Danner Videos:
http://www.youtube.com/watch?v=YookV4zyQdU
http://www.youtube.com/watch?v=XfOkTAJOi74&t=1200
Motor Age Pressure Transducer Testing : https://www.youtube.com/watch?v=bmIEbnglVj0

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Disclaimer:
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48 thoughts on “Exhaust back pressure testing – 2 methods”
  1. Avataaar/Circle Created with python_avatars kp ocala says:

    I need to borrow that guage. None of the auto parts stores have a loaner. Pretty sure my tacoma is clogged up.

  2. Avataaar/Circle Created with python_avatars Pontificus Vascillious says:

    pv=nrt

  3. Avataaar/Circle Created with python_avatars NEIL STEFFLER says:

    Great video.

  4. Avataaar/Circle Created with python_avatars Carl ODonnell says:

    I made one with a o2 sens by drilling out the center and installing a piece of copper tube with some epoxy and it works

  5. Avataaar/Circle Created with python_avatars Carl ODonnell says:

    I hate touch screen computers

  6. Avataaar/Circle Created with python_avatars gary mcmullin says:

    watched this and the entire time wondered why a simple observation with hands and ears at the tailpipe could not have revealed that the exhaust was plugged?

  7. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    Wow 70 Pounds Of Back Pressure that is impressive it even runs or idles pretty strong motor For sure Eric O good Video very informative @SouthMainAutoRepairLLC

  8. Avataaar/Circle Created with python_avatars Homero Aguilar says:

    Excuse me Mr. O I have a question for you I got a 95 buick Riviera 3.8 supercharged and zip had a problem with my RPM and my Speedometer my RPM just go over 11 or 1200 and my speedometer just go to 55 MPH the car goes over than that, I change the VSS sensor, that crank sensor and the fuel pump cause my float wasn't working right so hopefully you can help me with some ideas thank you and have a good day

  9. Avataaar/Circle Created with python_avatars wazza33racer says:

    When Holden Australia put that supercharged buick v6 engine in the Commodore, they deliberately crimped the exhaust system so it under performed the V8. When owners 'uncrimped' the exhaust, they had more power and used less fuel than the 5 liter V8.

  10. Avataaar/Circle Created with python_avatars Mechanicsville804 says:

    Thank you!
    John 3:16
    For God so loved the world that he gave his only begotten Son that whosoever believeth in Him shall not perish but have everlasting life.

  11. Avataaar/Circle Created with python_avatars Mechanicsville804 says:

    Hey why did you say this scope is useless? Just curious as I am in the market for a good scan tool and the Autels seem very good.

  12. Avataaar/Circle Created with python_avatars Alan Robison says:

    First day on the job? LOL

  13. Avataaar/Circle Created with python_avatars Richard King says:

    Interesting! I wonder if it could be possible to un-lock a cat. convertor with a chemical flush?

  14. Avataaar/Circle Created with python_avatars SNOW FALL says:

    Ahhh yes back pressure

  15. Avataaar/Circle Created with python_avatars mario mendez says:

    You forgot to mention the 2 percenters at the end of the video>

  16. Avataaar/Circle Created with python_avatars Danny Cole says:

    Jury rigging

  17. Avataaar/Circle Created with python_avatars Joe Turnip says:

    What painful penalty should be given to Auto Salespersons who sell Turbo Cars to little old Grannies that can't hear ??

  18. Avataaar/Circle Created with python_avatars Bob Huff says:

    I could watch all night

  19. Avataaar/Circle Created with python_avatars Richard White says:

    Where can I buy this pressure transducer? The link for tools and toys is not working. Also great video and your not the only one that didn't trust the results of it. The in cylinder pressure testing is the future of engine performance mechanical diagnostics and even tho you didn't really know why you made the video it for sure helped me gain a little more experience with a known plugged exhaust. Thanks Richard White, shop Owner/Technician

  20. Avataaar/Circle Created with python_avatars Kevin Clubb says:

    Where did you get your mathmatical equation to convert millivolts to psi

  21. Avataaar/Circle Created with python_avatars John Dee says:

    I realize this is a old video. But it is a motor which I have and love (thought mine is the Australian Holden version).
    I thought the video was great regardless. I also thought it would have been great if you had done a before and after (blockage removal ) of the readings for things like MAF, O2 sensors, Spark advance and even Knock sensor. So then maybe people who might not have the tooling, they could maybe be able to diagnose a blocked or restricted exhaust with the likes of just a data reader tool. Just a thought anyway.
    Did you actually find out if there was a failure in the exhaust or was it something like a "banana in the tail pipe" by someone? I presume that was what actually caused the previous engine to "explode"?

  22. Avataaar/Circle Created with python_avatars Kenneth Kidd says:

    Show what was plugging the exhaust when you can..

  23. Avataaar/Circle Created with python_avatars Patre Doski says:

    OMG! Put your hand behind the exhaust pipe and ‘feel the wind’ or NOT. First diagnostic tool…

  24. Avataaar/Circle Created with python_avatars Richard 1 says:

    Studying Exhaust BackPressure today and found one of my favorite YouTube Channels at SMA. Thank you Eric.

  25. Avataaar/Circle Created with python_avatars Michael Speakman says:

    I seen a Ford Explorer. Not start show no codes. The exhaust was plugged up. First thing they cut off with the catalytic converters. Instead of cutting before the muffler. Where do you think that shit all went to. From the catalytic converter. Think before you cut.

  26. Avataaar/Circle Created with python_avatars Ozzy Krahn says:

    the cricket is good if he makes a bad joke and everyone is quiet

  27. Avataaar/Circle Created with python_avatars Shane Harrison says:

    A friend had a 72 dodge polarafired it up one winter let it run for 20 minutes and warm up gave it a throttle snap and our next week was spent putting on another set of mufflers blew both them and the resonators wide open

  28. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Yeah that Gerry hes been rigging stuff since the 1800s on up

  29. Avataaar/Circle Created with python_avatars Jimmy, Making it work says:

    I have an adapter that threads into the O2 hole for a vacuum/pressure tap. Intake vacuum will show restricted exhaust as well, if it can’t get air out, it take air in.
    All your vids are popping up since I subbed. 🙂

  30. Avataaar/Circle Created with python_avatars Jose Peixoto says:

    man,this video is a no show?!

  31. Avataaar/Circle Created with python_avatars Andrew Middleton says:

    I would think that if your bottom line is +.500 v. then you would take that off at the end as well. so I would believe your around 80 psi.. otherwise your using it as a percentage rather than a start value.. I think.. I could be wrong sir.

  32. Avataaar/Circle Created with python_avatars Kathy Lewis says:

    So what was plugged cat or muffler?

  33. Avataaar/Circle Created with python_avatars David Price says:

    I can hear that the exhaust is almost totally blocked, we used to jam a potato into peoples exhaust pipes as a joke and 'if' (big if) their car started it sounded exactly the same. (Australia).

  34. Avataaar/Circle Created with python_avatars Alan Crawford says:

    It’s jury rigging, like the show “Bull” but illegal.
    Not Jerry-rigging.

  35. Avataaar/Circle Created with python_avatars the eabster says:

    When I hear of an exhaust being plugged my first thoughts are to unplug it.. I heard the term plugged exhaust but I don't know exactly what's plugged up in the exhaust? I guess a bunch of soot burned up oil? Nothing you can do to unplug it? You always have to replace it?

  36. Avataaar/Circle Created with python_avatars Dan Gerous says:

    Jerry or Gerry is a nickname for Germans in WW2. They were always rigging things to blow up or fail. The allied forces would always find things rigged and they started saying it's been "jerry-rigged".

  37. Avataaar/Circle Created with python_avatars Nelson Rodriguez says:

    Ho do you come up with the barometric pressure of 500

  38. Avataaar/Circle Created with python_avatars Spixy cat says:

    So you can use any MAP sensor for in cylinder compression test?

  39. Avataaar/Circle Created with python_avatars Larry Ehrlich says:

    We got the "before" but where is the "after"…we feel cheated…where is the after???

  40. Avataaar/Circle Created with python_avatars HouseCallAutoRepair says:

    4 years ago… And still relevant! Nice episode!

  41. Avataaar/Circle Created with python_avatars Daniel says:

    Get a shotgun and end that cricket 🤣

  42. Avataaar/Circle Created with python_avatars James Drury says:

    You can chech manifold vac at 1000 rpm and at 2500 should be with in one inch vac. Will show you exhaust restriction

  43. Avataaar/Circle Created with python_avatars KRTube75 says:

    I know how it feels. I just ate a home made pizza with about 1/2" of cheese. I'm going to be pushing out softballs for three days.

  44. Avataaar/Circle Created with python_avatars Alan TheRealEstateGuy says:

    3 1/2 minutes into it and you still haven’t shown us anything

  45. Avataaar/Circle Created with python_avatars Marshall Larson says:

    I don't know if Jerry rigged anything but the term is "jury rig"! You can understand how that is a problem.

  46. Avataaar/Circle Created with python_avatars Frank Jbird says:

    can't believe you didn't check pressure after the fix.

  47. Avataaar/Circle Created with python_avatars Shane Harrison says:

    It's all good gave you an educational bit to show for it and it's cool and all good enjoy it I do

  48. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Best constipation video I've seen with exception of that 4 banger frontier from nissan

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