does not idle up when booster hose is disconnected

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Aug 31, 2007 | 07:52 AM

#16

jsetzer

Registered User

Joined: Feb 2004

Posts: 2,182

From: Moore OK

Aye, I made the mistake of forgetting it while doing early tuning on my standalone, she idled @ 3500. But on a maf car it might die, so I would not worry about it.

Aug 31, 2007 | 11:01 AM

#17

LiENUS

Registered User

Joined: Jul 2005

Posts: 747

From: Baton Rouge, LA

Quote:

Originally Posted by shoebox

If a big enough vacuum leak is created, it's not going to make any difference what type of engine management there is. No amount of compensation is going to make it run.

True but the threshold is much higher for vacuum leak with speed density and pulling the brake booster hose will tend to make your idle jump whereas with MAF it will fall unless your idle is a bit rich.

Quote:

Originally Posted by 1racerdude

OK then tell me why a 1952 Chevy will do the same thing with NO computer

If you're talking about the one with a carburetor, if its idle jumps your idle mixture screw is set rich, if the idle falls then your idle mixture is probably set perfect or a little lean.