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passenger side air cleaner hole covered with red rubber
302 2v...m/t...2wd. Please help! There is nothing on my EGR nipple now. If I put a tube/line on there, where does the other end go? Yes, I've read all the posts on the matter I can find, and I'm still lost. bare nipple on left of photo passenger side carb
front of carb driver side carb
My air cleaner is not stock I know. Tempting to just connect it to the red plug cover, but I want to know where it's actually suppose to go. Thanks!
Last edited by msalander; Sep 9, 2020 at 03:18 PM.
Reason: add picture
The air cleaner port does not connect to the EGR but rather the PCV (positive crankcase ventilation) system (valve cover). The EGR should connect to a port on the carb.
Thanks C.O.! Can you see the carburetor port you mention in any of the pictures? My PCV valve has 2 connections: 1 to the front of the carb, and the top one is plugged off. Would the red cap hook up to the top of the PCV "tree"? I'll post picture.
does black plugged port connect to red plugged port on air cleaner?
Last edited by msalander; Sep 10, 2020 at 11:12 AM.
Reason: add photo
If you are not in a locale that requires the EGR to be functional I would leave it unhooked. Having it functional won't do you any favours in terms of fuel economy or power.
Ok thanks....I'm trying to learn. Plus, I like to have information before making decisions. I understand the keep EGR/delete EGR debate rages on. I won't be able to evaluate the functionality of the EGR system if it's not hooked up and hooked up properly. thanks again
Last edited by msalander; Sep 10, 2020 at 11:36 PM.
Reason: missing word
Ok thanks....I'm trying to learn. Plus, I like to have information before making decisions. I understand the keep EGR/delete EGR debate rages on. I won't be able to evaluate the functionality of the EGR system if it's not hooked up and hooked up properly. thanks again
No need to evaluate it just leave it unhooked. On carb'd vehicles the EGR reduces fuel economy and power, there is no debate those are facts.
I've read that EGR engines are "tuned" differently than non EGR?? If that's true, if the EGR isn't hooked up, won't the engine run worse?
They are not tuned differently per say. The issue is none of these engines will run as they did originally on today's fuels due to the lower BTU content of today's fuels they most all will run lean. All should be re-tuned/re-jetted or at least the AFR checked. Removing the EGR can compound this issue but that does not change the fact that the EGR reduces fuel economy and power. If the carb has been replaced in the last 10 or so years with a reputable rebuild that was wet flow calibrated then there should be no issues removing the EGR. And if the engine is tuned properly with the proper AFR then no it will run better without the EGR.
The only place you would notice if the AFR was too far out with EGR removal will be under cruise conditions under light to med throttle acceleration and then you will get a lean ping. If you have no ping then you have no issues pulling the EGR.
EGR impact and engine operation between EFI and a carb are not the same. EFI knows when the EGR is active and adjusts the fuel-air ratio and spark advance accordingly "potentially"allowing for increased fuel economy (even then not always) as many non-EGR EFI engines get better fuel economy and power than their EGR equipped counterparts.
A carb has no such mechanism to do this and you just end up losing fuel economy and power. Engines from the mid-'70s forward that were underpowered, to begin with, a working EGR may account for more than couple lost MPG and several HP.
These trucks were tuned for the gasoline of the day which is no longer made or sold so none of them are operating at peak efficiency and they should be recalibrated/retuned to maximize their economy and power.
But I can not advocate adding back in emissions devices that increase fuel consumption and reduce power and with a carb that is exactly what an EGR does.
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