Vacuum Reserve Canister ?

[kxc36g]

I have been chasing a stalling problem with my DSM for a few years now. Basically, if the engine is above 3000 RPM and I stick the engine in neutral, the RPMs will drop to about 500, the engine vacuum drops, and the car wants to stall. I have switched ISCs, FIAV water lines on and off, leaks, fuel, tuning, BOV.... Basically everything. I have learned to live with it by bumping up the idle and feathering the gas when I stick in the clutch.

The engine seems even less happy if I have to slam on the brakes/ do something that uses a lot of engine vacuum. I am considering plumbing in a vacuum reserve canister to give the engine an extra shot of vacuum when the engine RPM drops, hopefully allowing the engine to catch itself without actually stalling.

Does anyone think this will work? Does anyone have experience using these? I know they are usually used on engines with large cams, but it may just help my problem and aid braking and ring sealing by adding extra vacuum. Thoughts?

Thanks,
Chris

 

[L2RTSiAWD]

I know there is a thread in teh extreme forum about vacumm pumps, have you checked it out?

 

[loser3000]

Truthfully it sounds like your master booster is shot. But first before you replace that, have you replaced the one-way valve for the booster?
btw the vacuum reserve cans are made to develop more vacuum for the brakes, because the engine isn't able to provide enought vacuum. Its not a vacuumreserve for the motor.

 

[kxc36g]

Yes, the Vacuum pump thread is very informative, but it does not address the use of vacuum canisters which are quite different than pumps in practice.

I am aware that the canisters normal purpose is to boost brake vacuum on engines with big cams--which will drop the engine vacuum and cause the power brakes to not work correctly.

I would like to know if it is possible or practical to plumb the canister into the engine vacuum instead of brake vacuum. I am basically looking for a band aid to a problem I can not find, or who knows-- a little extra vacuum may make a BOV work better etc.

Any links would also work. Sorry for my ignorance... I can not find much information on vacuum canisters on the net.

Thanks,
Chris