Re: Vacuum Leak Detection

[four.rings@MCIONE.com]

Dave Conner <conner@cfm.ohio-state.edu> wrote:

I believe my "new" 91 200q has vacuum leak troubles.  So I tried
the
propane trick and got nowhere.  
The engine will run with the oil filler cap removed so I even
directed the propane into the oil filler hole and the engine rpm
did not change.
>>>>>>>>>>>>>>>>>>>>
Your '91 employs the hot-wire Motronic injection, it_will_run
even if vaccum is leaking, unlike the earlier cars with
mechanical CIS injection.

I spent ten minutes directing propane at every suspect hose with
no vacuum leak detected.
>>>>>>>>>>>>>>>>>>>>
When you come over to Philly next week I'll show you the "Vacuum
Leak Detector" by Lubro Moly. Contrary to Propane, this
stuff_stumbles_the engine if introduced into the intake tract.
Although it is still useless on your '91. 


[...] or do I just need to inspect/replace every suspect item one
by one?
>>>>>>>>>>>>>>>>>>>>
I am afraid yes.

************************************************************
Igor Kessel
'89 200TQ -- 18psi (TAP)
'98 A4TQ -- nothing to declare
Philadelphia, PA
USA
http://www.geocities.com/MotorCity/Garage/8949/homepage.html
************************************************************