My A/C is blowing though the defogger under load like others have posted. My question is how do you check vacuum? I've read where people say get a vacuum gauge and check it.


My first question is how much does an acceptable vacuum gauge cost?


The second question is how do you check the pressure and how do you know if it is the right amount?


I feel stupid asking but it sounds like you can check to see if a lot of things are running correctly by the vacuum pressure so I want to know.


Of course I can hunt down an easy leak or check lines for cracks or overall poor condition but I want to learn how to check the pressure. I'm also fixing to buy a code reader - thinking about a EQUUS 3145 - thoughts? Acceptable or too basic?


I have a 95 F150 XLT 302 auto 2x4 3.08 gears and 129K miles.


Thanks for any advice or comments!


Joel

 

every time I have had the issue with damper doors it was either a bad vacuum line, loose vacuum line or the in-line check valve that is generally close to the vacuum reservoir.


I paid 30 bucks for a cheap vacuum tester at a-zone, I find that at about 5 to 7" vacuum little operators start to travel, easily checked.


code readers to me depends on how much you want to spend, I got the cheap one through summit, forget the model but it was about 20 bucks, works just fine and came with a huge bok identifying all the codes.

 

Why the need for the code puller? Paper clips cost a couple cents. You can check codes without a code puller. Look at the sticky at the top of the 87-96 homepage and it tells you how to check the codes