The most under used and under appreciated engine diagnostic tool

[29chico]

That would be the Vacuum Gauge.  Inexpensive, easy to employ and way under used by the current crop of mechanics.  Does not work on diesel engines.  

The link below explains all about engine diagnostics using the vac gauge.  The scenarios show how the needle of the vac gauge will move with different engine problems.  Very useful.

Link:  http://www.secondchancegarage.com/public/186.cfm

 

[Almost There]

And here I thought you were going to say 'ears'!...  

Once you know what your engine and drive train are supposed to sound like at different speeds, it's the ears that are the early warning system.

Well, if you don't have your stereo up to volume level 10 they are....

 

[ArtW]

one of the few advantages of not having a working stereo?

 

[Trebor English]

Quote from Second Chance Garage link: "provided you know how to read the gauge in the first place."
The reading isn't so hard. The understanding what it means requires understanding how it all works. It doesn't say "code 53, change ignition coil."  All it does is give information. You still have to outsmart the engine.

 

[ramblingvanman]

I thought it was the mind, and critical thinking.

 

[Willy]

I have a dash mounted vacuum gauge in my rig. ..Willy.