Secondmessiah

ok, im new to working on cars and i really want to see if i can save a little money by finding my vacuum leak myself

could someone give me like a diagram of which hoses are the vacuum hoses or explain how to trace them myself, im pretty sure that once i know which hoses are which, i can figure it out on my own

takahashiRyosukeFC3S

well it's a bit more complicated than that. i have heard different theories on exactly HOW to find a vacuum leak.

1: carurator cleaner. can's of carb cleaner a flamable ie DANGEROUS!!!!! to find a vacuum leak start the car and slowly work your way around the engine bay spraying carb cleaner on vacuum lines and listening for your idle to spike. when it does this means carb cleaner got into the engine system and combusted. poof! there is your vacuum leak.

2: A 3" rubber plumbing cap from lowes of Home Depot. rig it up with your air compressor, cap the intake before or fater the AFM (Air Flow Meter), you choice and pressurize you car. about 30psi should do just fine. sinse the car is off you will be able to hear any hiss that a vacuum leak would create.

3: here is a diagram of the vacuum lines in an NA car these pictures can be found in the FSM (Factory Service Manual online) http://www.teamfc3s.org/main/factory...ual/1986_1988/

jon england

duck oil or any light oil sprayed (use a plant water type sprayer/mister)onto the pipes will do as it will momenteraly block off minor leaks in the pipes and cause the engine note to change, it will also not burn like carb cleaner so you wont risk engine damage.the only drawback is it does cause a stink and smoke if it drips on the exhaust. ive worked in four dealerships in the uk over 8 years and all have used this method. but this is on normal 4 stroke engines of course but i doubt it will make any difference.

hanman

propane torch will work too. not lit of course