Vacuum test 01

[tman81000]

wouldn't a cranking no start with zero vaccum reading mean a broken timing belt?

[jiujitsukiller9]

i dont know why people spend time making these videos, but it is much appreciated by someone that is in mechanic school, thanx .

[ashure36]

great video. Vacuum gauge is the one of the best all around trouble-shooting tools in the toolbox.

[174joedirt]

is there any way you could do a video on where to hook the vacuum gage up my mini van has no where to hook one up without splicing into a vacuum line

[Colis4321]

If at snap throttle the needle drops to about 10 then returns to a steady 20 would you say it has a restriction some where on the intake side?

[masster64]

I was expecting this series of videos for a very long time. VERY good, Duane!

I have 2 suggestions to make:

1) PLEASE simulate a condition when vacuum gauge is moving IN SYNC with a rough idle speed. This is not always a mechanical problem, but mixture related, you know better.

2) Hook a tachometer and show us how vacuum is related to engine speed each case.

[sbakar]

Duane, what make/model is your vacuum gauge? I'm trying to buy a high-quality gauge, the vintage Snap-On gauges are very nice but hard to find. Can anyone message me if they know what/where to buy a great vacuum gauge? Thanks.

[SJKile]

As usual, an excellent video. Thanks so much for taking the time to make them. Your videos have helped me on several occasions to go past my usual comment of "Now what do I do," to actually finding the problem and fixing it.

[theASEtech]

thanks for letting us see your good work

[fivefortyeye540i]

D, If u have a vehicle with no( service engine light) on and no noticeable problem such as misfires etc. Would this vehicle or such type vhecals make good practice for hooking a scantool , to recognize good data value such as o2 values, fuel trim, etc??

[tiagobaracho]

this is serious work !!! thanks for sharing the Knowledge

[meiermotorsports]

i would like to see how thoes readings compare to a misfire spark of fuel related.

thanks! and awesome video as always.

[mechretired]

the best as always,, my site now has lots of links to Duane.

Thanks for all you do and share, and the great example in 3:12m mark

bless you ! Ignore the neg. comments.

[jose6788]

An other great video!!!

[dmorley100]

I didn't know you did any sort of teaching outside of these YouTube videos. Only thing I gotta add to this is if you're gonna do any of these tests, get a GOOD vacuum gauge, not one of those el-cheapo vacuum pump gauges like you get from AutoZone. The needles on those have a lot of bounce even on a perfectly sealing engine.

[panon1000]

thank you nice video

[TheTarrMan]

Good to know.

[vgs8606]

Excellent video! I was surprised to see naked valves on a running engine! Don't you get oil spray?

[eyelesskiller8]

really helpful . You should be a teacher!

[Trex1268]

Where did you get the oil clips for the rocker arms at? Part Number?

[samukaaaa]

@Trex1268 Search for "Rocker stopers" on youtube.

[beefystik]

Wow, I just thought you were going to pull out a spark plug. Nice video Duane :)

[DJDevon3]

That's pretty neat. I had no idea a vacuum gauge could be used like that. Thanks!

[chicho2281]

excelente video gracias por la informacion

[junglejim13660]

Wayne, Thanks for this excellent video and keeping us shade tree mechaincs up to speed.

[CHIBA280CRV]

Great informative video, i was just lucky and got pickup a used snap on gauge similar to your,'s for 25.00 with all the fittings and case at a garage sale., thanks i have learned a lot by watching your videos..thanks Duane..

[gregp05]

very good video!

[spelunkerd]

I'm not surprised to learn that you teach locally as well, Duane. This is another excellent demonstration.

[markjhicks]

Excellent video Duane! The guys in the field forget about this test all the time. Once it is understood, it is easy to perform and is extremely accurate. Nice work my friend!

Mark Hicks

Wells Vehicle Electronics

[AutoTechHector]

@markjhicks I couldn't agree more with you..Many of the techs that i work with don't even own a vacuum gauge.

[Popeye304]

How did you disable the engine and where is your vacuum gauge plugged into?

[hp11208]

@Popeye304 He took out the fuel pump relay or fuse.

[sbakar]

Nice video. That Snap-On vacuum gauge looks like a beautiful piece, where/when did you buy it?

[pfcwar5150]

most under rated tool in the garage