I think I have a vaccum leak. I thought I fixed my problems but here goes: ac vents blow out ONLY when im not on the gas and when im in nuetral. And my cars is running hotter (215)...during running over 50mph...So my questions is what do u guys think and if it is a vaccum leak how much is it NORMALY to fix and is it something I could fix myself if I dont have expierience in that field?

 

Check for a leak between the vac resevoir tank and the firewall.

 

HOW? I dont know what to do or look for...Like do I take my moms vaccum and hook it up?/? lol kidding but kinda

 

........is there not a vacuum "T" and line at or near the firewall and distributor thyat "feeds" the a/c switching for the car?......that is where mine leaked......

 

assuming you have some mechanically abilities and an attention to details, you should be able to find/fix most vacume leaks.

What is vacume -- it is suction the engine's pistons create -- and is used for many things -- from sucking in fuel, to helping the brake pedal, to operating various switches and valves to control many things from emmisions to your heat/AC air direction.

It might be worthwhile just testing the vacume at idle to see if it is normal or low (should be 15-20 psi).

the Vacume is routed to the switches and valves off the engine via small rubber hoses -- usually about 1/4 to 3/8 inch in diamater.

Vacume is also 'stored' in a small plastic container, mounted in behind the front bumper driver side (at least for the 94).

'Vacume leaks' occur in either the rubber hoses or in the switches/valves.

A simple way of finding a hose leak is to just follow the hoses and look for cracks or disconnected hoses and replace any that look bad or are cracked.

If one of the switches or valves are leaking, sometimes just listening while the engine is idleing might find it or immediately after turning the engine off (assuming the vacume storage tank isn't leaking).

Otherwise, there isn't a average 'estimate' for finding a leak, it could take minutes (and you'll still be charged a min charge) or it could take awhile, and involve many parts and removal thereof.

 

I've heard that spraying carb cleaner around the vacuum connections while the engine is idling and an increase in RPM's is heard will point to a leak. I have never tried it but it makes sense.

 

Or starting fluid. Best to have it slightly above normal idle though so the vacuum pull will be stronger. Spray everywhere you can find a vacuum hose. When the engine revs up, there's your leak.

 

check the a/c ' cruise check valve at intake manifold.