88 80Q, Runs rough upon starting//possibly resolved

[nick at beol.net]

When I swapped out the pentosin system on my '90 200 and installed vacuum  
brakes I had the same kind of problem. Leaking at the booster, come to  
find out it is critical that there no leak between the booster and the  
master cylinder. Fixed that leak and all is well.
In my case the booster wasn't bad.
Nick





On Fri, 17 Nov 2006 13:55:25 -0500, Eric Huppert <dragracer at netstep.net>  
wrote:

> So, last night I finally pulled manifold, checked injectors, cold start
> valve, inj seals, etc, etc... no leaking injectors, seals were all okay.
> Went through electrical components again, (love checking perfectly good
> parts twice!!
>
> Seemed a little better this afternoon, so decided to take it for a drive!
> Turned the radio off (sons car!) and drive a short distance... As I'm
> driving a hear a vacuum leak inside the car... (No, propone fogged the  
> whole
> motor and any possible leak points, never did inside the car...
>
> Turns out the brake booster is bad... Leak changes with pedal  
> application.
> Thinking the booster was bleeding completely down and upon startup the  
> car
> would run alright for a moment, but the vac demand and leak were too much
> for the system.
>
> Plausible? Seems to start and run fine with line pulled from booster and
> plugged.
>
> Eric
>
> Of course I heard the howling rear wheel bearing which has to be replaced
> prior to buyer taking ownership... ARGH!
>
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