EGR delete Help ?
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5th Wheeling
Joined: Aug 2020
Posts: 38
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EGR delete Help ?
I have a 1992 F-150 with a 302 EFI. Since installing with headers and just mufflers and pipes, I get rough idle, hard starts, etc. No cats have been installed, so no place for smog sensor etc. I do not want that crap on there anyway. So what delete kit would I need for the EGR delete ? Is the A.I.R the same ? I'm sure I could find a Youtube video on how to do, but have no clue on what I would all need. Anyone do this on a 302 yet? Can anyone direct me to the correct and complete set to do this?
Thanks
Thanks
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Smog sensor? Do you mean the O2 sensor in the exhaust Y pipe? If so that has to remain or you may as well put a carb on it because the EFI system is crippled without it. A bung in the passenger side header collector will do.
All of the air injection can be deleted, the air pump, tubes and valves, and the crossover tube across the back of the engine.. plug the resulting holes with 5/8 x1" coarse thread bolts wil copper washers.
EGR shouldn't be deleted but it can be disabled. Remove the tube to the exaust and sandwich a piece of sheet metal between the valve and intake to seal up that end. Leave the position sensor and vacuum line attached so it goes through the motions.. that will minimize codes and prevent a check engine light.
All of the air injection can be deleted, the air pump, tubes and valves, and the crossover tube across the back of the engine.. plug the resulting holes with 5/8 x1" coarse thread bolts wil copper washers.
EGR shouldn't be deleted but it can be disabled. Remove the tube to the exaust and sandwich a piece of sheet metal between the valve and intake to seal up that end. Leave the position sensor and vacuum line attached so it goes through the motions.. that will minimize codes and prevent a check engine light.
Logistics Pro
Joined: Aug 2014
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Smog sensor? Have no idea what you are talking about.
Electronic Fuel Injection (EFI) must have a Heated Exhaust Gas Oxygen (HEGO) sensor.
that tells the computer if it’s lean or rich and adjusts fuel accordingly.
Do you have an O2 sensor installed on the headers?
Electronic Fuel Injection (EFI) must have a Heated Exhaust Gas Oxygen (HEGO) sensor.
that tells the computer if it’s lean or rich and adjusts fuel accordingly.
Do you have an O2 sensor installed on the headers?
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
Yes that is the primary sensor.. cannot be deleted.
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Cargo Master
Joined: Mar 2007
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The O2 sensor tells the engine computer if there is the right amount of fuel going to the engine. Too much/little is bad. This sensor allows the engine to be just right. Although it should not make the engine run terrible, it's one sensor that should never be deleted. There is just so much good about this sensor.
Cargo Master
Joined: Mar 2007
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A quick Google search would answer your question.
The sensor should see all the exhaust pulses. So, if you have a left and right, at the end of the collector would be ideal. If not, where all the exhaust merges is a good place.
The catalyst 'cleans' up that exhaust so after the catalyst is not going to work. The sensor needs to be pointed downward. If it is not, water can enter the sensor and ruin it. Putting it in a place that sucks to maintain, is a bad idea. Plan it out.
The sensor should see all the exhaust pulses. So, if you have a left and right, at the end of the collector would be ideal. If not, where all the exhaust merges is a good place.
The catalyst 'cleans' up that exhaust so after the catalyst is not going to work. The sensor needs to be pointed downward. If it is not, water can enter the sensor and ruin it. Putting it in a place that sucks to maintain, is a bad idea. Plan it out.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
In the side of the passenger header collector is best, if you know the collector/exhaust pipe junction is sealed up tight right behind that is also good. The sensor does not need to see all exhaust pulses, it it more important that it be close to the engine.
Cargo Master
Joined: Mar 2007
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Need, yes, but it should. If you had an 8 cylinder and the sensor only saw 1 of them, that may not work right.
The more the merrier. Especially if you are trying to find a place that works. Your slate is clean, why not start on the right foot?
The more the merrier. Especially if you are trying to find a place that works. Your slate is clean, why not start on the right foot?
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
The batch fired config has limited ability to adapt to out of spec injectors, if one is leaking making the overall mix rich then it's only move is to make everything else lean.. which isn't ideal and could result in a detonation prone engine, if the sensor doesn't see the problem cylinder the engine would actually run better. But of course it can go the other way too.
Cargo Master
Joined: Mar 2007
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I'm not a Ford mechanic, but back in the day, I used try and fix engines that did not run right, after exhausting all my talents [where there were none] I would ask the Shop Foreman and he always asked if I checked for vacuum leaks. Many times, there was a leak on one of the runners. That would cause the engine to misfire because that cylinder was running so lean compared to the others.
So, if there is a vacuum leak at one of the ports that could effect the O2 sensor a lot. If the sensor was watching it, it would enrichen the entire mixture, if the sensor was not, then it's possible that cylinder will be running very lean.
Without a doubt, a well running engine the sensor does not have to see all the cylinders, but if you have the opportunity to mount the sensor anywhere, I would look for the best area. If that area means you can't access it, then I would look for the next best thing.
So, if there is a vacuum leak at one of the ports that could effect the O2 sensor a lot. If the sensor was watching it, it would enrichen the entire mixture, if the sensor was not, then it's possible that cylinder will be running very lean.
Without a doubt, a well running engine the sensor does not have to see all the cylinders, but if you have the opportunity to mount the sensor anywhere, I would look for the best area. If that area means you can't access it, then I would look for the next best thing.