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Re: HEI [Re: WE b OLD] #1314816 Wed Jun 19 2019 12:52 AM
Joined: Mar 2010
Posts: 8,055
5
52Carl Offline
Master Gabster
The PCV system uses vacuum from the intake manifold to operate. This represents a small vacuum leak which is compensated for by adjusting the fuel air mixture. If the PCV valve becomes clogged and no longer draws vacuum, you will have an issue. A 21 MPG to 12 MPG problem? No. But a problem none the less.

Re: HEI [Re: WE b OLD] #1314858 Wed Jun 19 2019 01:13 PM
Joined: Feb 2001
Posts: 6,365
W
WE b OLD Offline OP
Master Gabster
Thanks, I am grasping at straws and it is all wet just like me. grin


Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2015 GMC terrain.
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