2003-2011 [Subscribe to Daily Digest] |
[Main 93 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: The pump is dead since day 1... Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Thu, 26 Jun 2014 13:19:49 In Reply to: The pump is dead since day 1..., magalar [Profile/Gallery] , Thu, 26 Jun 2014 09:59:05 Members do not see ads below this line. - Help Keep This Site Online - Signup |
No the vacuum pump is there due to the cold start fast idle emission related stuff.
To light up the catalytic converter more quickly and get the engine into closed loop, they raise the idle when you start it cold and with that, it doesn't build much intake manifold vacuum and you get stiff brakes in return.
When you drive the car normally, you don't need extra vacuum because the engine produce enough by itself during all throttle closings.
Anders
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.