Ye Olde Smog Pump
Junior User
Joined: Apr 2009
Posts: 50
Likes: 0
From: Swoyersville
ya dont play with the hoses on a electronic engine. unless your planing on putting electrical tape over the check engine light. Eventually if it gets bad enough it will mess with the o2 sensors and your will get really bad millage any way so the whole thing would be pointless.
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Elder User
Joined: Jan 2009
Posts: 774
Likes: 1
From: East Tennessee
Well, I'll never know if I'm throwing a code because my truck, and I thought all these year model trucks, do not have check engine lights. I need one of those cheap code readers from autozone. I've just never had the need for one, yet.
Well, this will be day 2 for me with the belt off the smog pump. I look at it as less resistance on the engine. And like someone else said, that's one less pulley on the alternator. I've kept the belt in my truck "just in case" something goes odd.
Well, this will be day 2 for me with the belt off the smog pump. I look at it as less resistance on the engine. And like someone else said, that's one less pulley on the alternator. I've kept the belt in my truck "just in case" something goes odd.
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
I wasnt talking about the electronic control carb because to alot of people its different from a regular carburator. We were talking about a vehicle that had no computer at the time.
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
Mine still currently has it's 2 smoke grinders (air pumps) but the EGR has been blocked since right after I bought the truck in 1994. Never had the first sign of pinging. I did change the timing chain to the early 429/460 set (pre-72). Still gets 10 mpg, but pulls anything.
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
What about the motors that were built before egr was used or the egr was blocked off? I dont know thats why I am asking. I want to go away from all the emissions stuff thats why I was going to get a new manifold with no egr or other emmision stuff on it.
Senior User
Joined: Dec 2008
Posts: 294
Likes: 0
From: East Bernstadt, Ky
Even if removing the egr does cause pinging (which is possible because it messes with the mix and combustion) it can be cured with timing adjustments and ensuring that you have a good timing set, try to avoid the poly coated chains which can wear. And while you are in there check the set for proper clearance.
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
Thats what I thought but I wasnt sure. I am probably going to have to rebuild my motor anyways again becuase for some reason its blowing smoke like its a fog machine 
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Moderator
Joined: Jan 2001
Posts: 56,983
Likes: 2,736
From: Virginia
The EGR was not needed in the earlier engines because of how the engine is tuned. The later engines have a delicate balance going on for mileage and emissions. Changing stuff around messes it all up.
I even ran into the pinging problem when I went to headers, and that's when I found out a lot of Fords used a EGR that works on backpressure. Reduce the backpressure, and you get less EGR. It would ping terrible if I ran it on the interstate. What I did to fix that was to put larger jets in the carb, and put a 180 thermostat in it.
I even ran into the pinging problem when I went to headers, and that's when I found out a lot of Fords used a EGR that works on backpressure. Reduce the backpressure, and you get less EGR. It would ping terrible if I ran it on the interstate. What I did to fix that was to put larger jets in the carb, and put a 180 thermostat in it.
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
i feed back carb is the same as a regular carb,it just has solenoids controlling the air fuel mixture.there for it needs the o2 sensor.i believe the one your thinking of is a throttle body injection.my 83 ranger has an o2 sensor and it's carberated.
Hotshot
Joined: Apr 2006
Posts: 11,794
Likes: 0
From: Kansas City, KS
1986 F150. 300 I6 with a feed back carburetor. 
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
The EGR was not needed in the earlier engines because of how the engine is tuned. The later engines have a delicate balance going on for mileage and emissions. Changing stuff around messes it all up.
I even ran into the pinging problem when I went to headers, and that's when I found out a lot of Fords used a EGR that works on backpressure. Reduce the backpressure, and you get less EGR. It would ping terrible if I ran it on the interstate. What I did to fix that was to put larger jets in the carb, and put a 180 thermostat in it.
I even ran into the pinging problem when I went to headers, and that's when I found out a lot of Fords used a EGR that works on backpressure. Reduce the backpressure, and you get less EGR. It would ping terrible if I ran it on the interstate. What I did to fix that was to put larger jets in the carb, and put a 180 thermostat in it.
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
the egr only opens at crusing,and allows some exhaust gas to re enter the intake tract and get pulled into the cylindersas an inert gas,this allows the cylinder to suck air /fuel and spent exhaust gases into the cylinder.at idle and wot the egr remains closed.it's actualy ment to allow the engine to run leaner at crusing,use less fuel.this is what i was taught.did i get that right Franklin2?
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
I just picked up an '83 F100 with a carbed 302. Someone mucked with the emissions equipment. The Air Pump belt was removed, and some vacuum lines were disconnected. I replaced the belt, and connected all the lines that I could determine the routing, but I need a line from the vacuum control unit that sits on the Air Pump. I don't know where this goes.
I need a good photo of the vacuum lines on an '83 carbed 302.
Can anyone help?
I need a good photo of the vacuum lines on an '83 carbed 302.
Can anyone help?