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Old 11-27-2012, 11:29 PM
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Rzeppa Rzeppa is offline
Cruise Moab Chairman
Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 6,718

Originally Posted by nakman View Post
You beat me to it, Farnham.. was going to post almost the exact same thing.

great tech thread though, dang! almost wish I had a 2f..
I rebuilt the F on my '71, put it back in there and I swear it is even louder than it was before!
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
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Old 11-28-2012, 09:20 AM
SteveH SteveH is offline
Hard Core 4+
Join Date: Aug 2006
Location: Colo Springs
Posts: 1,837

The point of EGR is to suck in burned fuel mixture to slow the combustion of the regular air/fuel mix. Slowing the combustion lowers the temps and creates less NOx. Some vehicles can suffer spark knock after disconnecting the EGR, but it's not common on 2Fs, because the compression isn't very high to begin with. You can leave all the equipment in place (for a visual) and plug off the manifold port, if you want. If you have removed the EGR vacuum line, the EGR will not open and exhaust will not flow through that tube.

If I were desmogging, I would put a BB in the EGR line, be sure the EGR valve is actually shut, and cap off that rear manifold port, to prevent current and future leaks. Many people cap it off by dropping a slug of steel in there and welding it in place. You can then bolt the tube right back up and it will look stock/OEM.
Steve H. - KE0KNH
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner
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Old 11-29-2012, 06:11 PM
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bigcity25 bigcity25 is offline
Join Date: Nov 2010
Location: Denver
Posts: 288

Well after looking at my engine bay today the EGR vacuum is capped off. Guess I never used that and tells me I don't need it. So next step is to do some digging,remove and cap that off.
Jeff Billingsley
Denver Colo
7/70 Fj40
desmogged 2f, 4 speed
TLCA #21898
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