Since we have so many new list members and Eliot Brenner is suffering
from poor gas mileage I thought I would recap my vacuum leak post.
ANY vacuum leak will degrade performance. Now that I have plugged my 6
leaks and my car runs wonderfully in hot or cold weather. You CT people
recall we have had -10 to 105 F. temperatures the past year.
Here were my leaks:
-
Both broken vacuum line "T"s off the top of the intake manifold.
White PEP Boys replacements. -
Both worn out vacuum switches at Fuel recovery system (EVAP) under
front driver side cowling under front bumper. $110 OEM only. -
Fallen off vacuum feed under intake manifold by throttle body. (This
is a touchy feelly search with thin hands) -
Disconnected vacuum lines in climate control systems
-
Center dash vent flap leak. (Yes the one you have to take out the
dash. (yes I can repost that too.)). $65 OEM kit. 6+ hours of my labor. -
EGR valve vacuum leak. ($55 new part is only option, sorry no Chevy
substitute)
Current mileage, City=13-16mpg, Highway (65mph)=23-26mpg.
I have Brett’s Sport Mode modification on about 50% of the time.
I will have to replace the intake manifold gasket to cut the last leak.
Fortunately, I spew so much gunk from my high mileage valves that I no
longer clean out the intake manifold as this clogs the gasket leaks.-----
Oh yes, last night entering the highway, Ford Excersion tries to out run
me as I merge. Another ignorant SUV driver. Damm does the “Mistress”
leap forward even at 65 mph!
Christoph Hanau
1990 XJ40 (US) 138K “The Mistress”