Intake plenum?
Posting Guru
Joined: Feb 2002
Posts: 1,712
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From: Atlanta, Georgia, USA
Intake plenum?
If there's actually stuff in there, then you've got problems. I've pulled them off after 200,000 miles to find them spotlessley clean. Reason is, gas tumbles through it the whole time, so whatever would try to stick to it would get flushed out instantly. TK
'77 F100, 302 (the aftermarket Prodigy), C4
Cadet Second Lieutenant John F. Daly III
South Carolina Corps of Cadets, The Citadel
The TorqueKing
'77 F100, 302 (the aftermarket Prodigy), C4
Cadet Second Lieutenant John F. Daly III
South Carolina Corps of Cadets, The Citadel
The TorqueKing
New User
Joined: Oct 2002
Posts: 9
Likes: 0
From: Biloxi
Intake plenum?
NOT neccessarily true. You have VERY hot exhaust gas (EGR valve) mixed with "dirty" oily vapors via the PCV valve both introduced into the intake manifold. The only source of "fuel" is the limited vapors drawn from the fuel tanks' vapor purge lines. This is miniscule compared to the oily residue coming from the top of the crankcase! The intake manifold of my 4.9L inline-6 is VERY oily, but this does not impose measureable restriction on the intake. I am a neat freak, so I thoroughly spray carb cleaner into the intake every now and then. Probably doesn't help the manifold, but maybe cleans the combustion chamber some!?!
Ron
Ron
Intake plenum?
