i have had it for about 5 months now but this problem just started recently. when i turn it on it sounds like its sucking in to much air and it seems like it not as fast as it use to be either.

 

Try looking for a vacuum leak. A propane tank that is on but not ignited can be held in different locations to find a vacuum leak. If the idle increases when the stream of propane is held at a specific point will indicate a vacuum leak in that particular area. Don't smoke when doing this - these cars are old & have alot of various vacuum lines that crack and deteriorate. When in doubt replace old lines.

Ramses666

 

A much safer way of doing it is to get yourself one of those spray cans of Throttle and Intake Cleaner. Spray it around and listen for the engine to bog down.

I dunno... I'm just not too keen on the idea of using an open bottle of Propane, lol...

 

How about just replace 'em all... They're all old anyway...

 

Are you sure it's not just the clutch fan doing its job?

 

$$$...

Not all of us are made of money...

 

That's right replace them all. If you find the leak, which I doubt, it would just be a temporary fix. I've done this a couple of times and its well worth it.

Replace all vacuum lines with silicone tubing from Mazdatrix, choose the color you like. Of course it's best practice to replace one at a time.

http://mazdatrix.com/intake.htm

Also replace the following while your under the intake manifold: (you can get all of this from Mazdatrix.com

-Spider hose vacuum lines and "splitter block" for oil metering lines
-Oil metering lines
-Fuel injector grommets, air bleeds, pintle caps, and injector o-rings.
-Intake gaskets

That way, you won't have to go under the intake manifold again.

Note: this is about a level 6 competency level.

good luck!