Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: jszeman1 on July 31, 2008, 06:18:16

Title: Engine idles fast when you step on the break
Post by: jszeman1 on July 31, 2008, 06:18:16

I have an early 63 230sl.  When I down shift and step on the break to make a complete stope the engine revs higher. After 2 or 3 presses on the gas it stops but revs higher again when break applied.  A quick fix I hope?

Title: Re: Engine idles fast when you step on the break
Post by: glennard on July 31, 2008, 07:53:54

Gotta leak from the brake booster into the intake manifold.  Also, sounds like you're running a rich idle.  (That's my first guess :?: )

Title: Re: Engine idles fast when you step on the break
Post by: Jonny B on July 31, 2008, 21:36:05

Try the search function with "brake booster leak" I got a single page of hits, and there were several there that look like they might be able to help you with the issue you describe.

Title: Re: Engine idles fast when you step on the break
Post by: gugel on August 02, 2008, 13:01:00

As glennard says, you must have a leak from the brake booster into the intake manifold.  It could be the hose leading from the booster to the manifold, but IMO it's more likely that the brake booster needs rebuilding.  (A new one is very expensive, and doesn't look the same as the original).

Chris