Do you have a VAC Gauge?????

[vristang]

I would like to get one on Friday to help prove/disprove a theory I have on the IAC, and I think it would be very valuable when trouble shooting.

I would like to know if you guys have them mounted permanently, or if you just tap into vac when you are trouble shooting. I know that a vac/boost gauge will work, and I am familiar with the basic idea of engine vac. I am just looking for advice on how/where to mount them things like that. Do you have any complaints about your gauge? What do you really like about the setup? What are some of the options? What brands do you recommend? Etc?

I appreciate the advice
jason

 

[HISSIN50]

Jason, I have one on a couple cars. I like it, esp on the SD '88 (and on carbed stuff, I find them very useful. that is where my other one is right now). Both are permanently mounted.

I also have a Miti-vac which I use for troubleshooting. I find it more useful than just a gauge because I can pull vac on hoses and systems to narrow things down.

You probably dont need a permanent vac gauge. It is boring to watch - as you know the vac signal is inversely proportionate to rate of acceleration. It is fun watching it ****e when decelerating in gear from speed.

I grabbed vac from the vac tree (unused port). You can just tee into another line though.

You knew all that info though. Mounting is your choice. Mine is out of the way since I dont reference it that often. I run a cheapie since it is about as simple a gauge as you will find.

Good luck!

 

[luckythirteen13]

mines is permenently mounted. i have it threaded straight into the upper manifold. i take a look at it when im up to temp every once and a while to make sure i dont have any leaks. any name brand will do. mine is made by Mallory but an auto meter will be just as good

 

[87'GTstang]

If you stall after coming from WOT, have a car that starts then stalls afterwards in the morning (or have to open the thottle plate manually), then you have either a worn-out or dirty IAC valve.

If you have either a hunting or hanging idle, it could easily be the MAP sensor if SD, or a slight problem associated with the IAC in addition to the MAP (sometimes it can hang up if worn or dirty).

Troubleshooting a device such as the IAC is as simple as just knowing the basics and all of its operations - and you don't need a gauge to tell you that (but still a decent bit of info in the cockpit to look at).