smog pump
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Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
Originally Posted by 73Fastbackv10
You have to readjust the timing if you take it off and plug the intake manifold.
what??
the smog pump has nothing to do with the intake manifold. you must be thinking of the EGR which you should leave alone regardless. removing smog equipment is illegal and selling the truck down the road might pose and issue.
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
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Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
If you have factory exhaust I would be careful plugging that because that feeds air into the cat and if it is not working right or removed it can cause the cat to overheat and get plugged. I agree with kemical, really no performance gain.
Posting Guru
Joined: Apr 2006
Posts: 1,274
Likes: 1
The smog pump puts air in to the system so the unbearnt gases can burn in the cat. If you unhook it, those gases will pass out your exhaust. So your cat will run cooler. If you could remove it completly, you would have a small gain in HP. But I dont know how you would run your belt. I dont know if they even make a serpintine belt for that configuration.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
Likes: 1
From: St Louis
The cat you could get by with using a GM non air cat, since GM didnt use air like ford employed. Very minor gain in the engine not using energy to turn an accessory, read no gain in horsepower. You dont have to worry about a CEL if you have an older truck that didnt check for the opening and closing of the vacuum valves as long as you just took the switches off the vacuum supply and left them connected to the wiring harness.
Posting Guru
Joined: Mar 2007
Posts: 1,757
Likes: 2
From: Florida
I'm doing the same thing right now...actually already did it..everything except the pump......course...I'm doing GT40 heads and plugging the backof them off...cleans up your engine compartment too.....
JR
JR