Vacuum Testing with a Professional

[@jamalharvey66]

Excellent video. I am teaching high school auto tech and trying to find good videos of measurement tools to show the students.

[@MrBryan-km5nn]

Glad it was helpful and feel free to use any of my videos in class.

[@E85_STI]

I like this video it’s very thorough and I just bought a vacuum gauge like this in the video but I use my boost gauge for the STI. Now on my Acura I used the vacuum gauge and the reading at idle was at about 23” of mercury so more vacuum is Better than less vacuum so I just like testing while everything is working so I have a baseline.

[@rjmlondon]

Great informative video. Chevy 5.3L. Idles at 16"hg. Throttle blip goes 16"idle to 0 to 21 to 13 and then back to 16 in hg Steady 3000 rpm 16 to 21 and holds there. Does this indicate i have a vac leak and its pronounched at idle? seems low at 16 but all else seems fine.

[@playwithgarvin]

Very good guide!

[@pigeonsil240sx]

do you have a link for those steps?my guage came with a symptoms chart and this would be great to add to that

[@jonathanhenderson8403]

Definitely don’t wanna run into this guy at the dmv while tryin’ to pass emissions…

[@arctican7483]

Gold!

[@ajw6715]

Hi, Have a 428 SCJ Ford engine in a 1969 Cougar. The engine was running fine and then all of a sudden low vacuum of 2.5. at idle. Took off the intake and resealed it. No change . Vacuum gauge shows late valve timing. Engine runs fine but not enough vacuum to close the head light. Looks like the cam timing gear must have slipped. I bought the engine as a rebuilt engine. Rebuilder left out the cam dowel pin?

[@thedobermangang3503]

got qugot question for you ....i just rebuild my chevy 350 1990 k5 blazer i converted it over from tbi to carb ..i did a few up grade on the engine high performance intake headers 3' pipes all way back up graded the cam to a howard rattler cam 525 intake lift 535 exhaust duration 227/235 lobe separation 109 center line 103 i still the same factory heads on there i believe they the swirl port heads ..i no i should have went with some better heads but the engine was already done. i put a brand new 1406 edelbrock carb on it right out the box every sence i put that carb on there i been using alot of fuel i set the carb best as posible ..im using a awful lot of fuel just with it iding..i have my pressure regulator set at 5psi..dont no why im losing so mush fuel

[@pigeonsil240sx]

also what was the purpose of the unplug injector test and what should be seen?

[@mohamedgamaleldien4216]

i wish to say the best vacuum test explanation video ever but i don't want to state before i see others and confirm!

[@abimariavargas7086]

What causes cranking vacuum to drop regularly

[@billspeight8936]

When I turn engine off the vacuum does not drop to zero it stays at the same as when it was running. 2arfe Camry

[@jessedelheirro5156]

Thank you Mr. Bryan this helped a lot with some questions I had. I'm wondering if I had any further questions I could message you. See I am still going through school for automotive school. Some things I still am learning and trying to understand.

[@MrBryan-km5nn]

Yes you can

[@bostonarchie6639]

i realize I am quite randomly asking but does anyone know a good place to stream newly released tv shows online?

[@mylesterrance5924]

@Boston Archie flixportal :D

[@bostonarchie6639]

@Myles Terrance thanks, I signed up and it seems like they got a lot of movies there :D Appreciate it !!

[@mylesterrance5924]

@Boston Archie no problem =)

[@amjadmadanat101]

Good Day Mr. Bryan , just watched your video and i have a question if you could help me ! I have 1998 Rav4 2.0 3s engine and BMW 1987 E30 320i , I snapped accelerate the engine for both cars but the vacuum didn't drop to zero , not even close to it ! the needle didn't pass the 17 hg ! how do you explain that ? Thanks

[@davidjoegamez5901]

Mr. Bryan, where did you get the adapter to that vacuum gauge ?

[@Bgroup80]

Thank you for precious information ....my engine goes to below zero mean -20 what could be problem ..it happens only after 30 min drive on the highway... thank you

[@u.s.a.198]

Ty

[@28704joe]

Where did you get the instruction sheet on vacuum testing?

[@MrBryan-km5nn]

It is a lab sheet that I modified for my use.

[@pabloenriqueespejel2577]

@@MrBryan-km5nn can i get a copy ?

[@MrCbell57]

Very good info. So do you have one for checking carb? And timing?

[@MrBryan-km5nn]

Not yet

[@nazimmultani6177]

Sir if vvti failure what is reading

[@teacafe7553]

what camera you used for recording? and how you hold it? Its quality very nice and smooth. Thanks in advance

[@MrBryan-km5nn]

I used a GoPro 5 for this video with a mount on my head. I'm glad that you enjoyed it.

[@sk8allica1]

Thank You Mr. Bryan, Will This Exact Procedure Work For A Honda Civic 2009? Thank You, For The Video (:

[@MrBryan-km5nn]

Yes it will, but you will have to use the gas pedal to open the throttle since the 2009 is drive by wire.

[@raymondmenendez6499]

I have a 1970 C10 with automatic transmission. Do I do an vacuum test in gear? Or neutral?

[@MrBryan-km5nn]

All of the tests shown are in neutral, sorry for the late response I have been out of town.

[@raymondmenendez6499]

@@MrBryan-km5nn don't be sorry, you gave me advice, not something that not working

[@benrodeheaver701]

Mr Bryan, can you tell me if insufficient valve clearance (1) will cause an erratic vacuum reading at idle?

[@MrBryan-km5nn]

It the intake valve is not sealing then you will have a rapidly moving needle, If the exhaust valve is not sealing then not so much. I hope this answers the question for you.

[@benrodeheaver701]

Well then I have an intake valve on no.3 that needs clearancing.