Egr delete?
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5th Wheeling
Joined: Dec 2019
Posts: 43
Likes: 2
Egr delete?
Hello all, I’ve been having problems with my EGR since the day that I got my truck (93 f150 302 with M5od) I’ve tried replacing vacuum canister with a plastic one with no holes, replace egr tube and egr itself, tested everything and it still is giving me rough idle problems and throws a ce light when under hard acceleration and sometimes normal acceleration. I have the handheld code reader and it gives me the code for egr malfunction. Have been seeing kits going around that come with a block off plate and a dummy plug just want to see what others have to say. Just figured it would answer all my problems in one shot
BTW already have o2 sensors and cats deleted from the truck
BTW already have o2 sensors and cats deleted from the truck
Laughing Gas
Joined: Jul 2023
Posts: 991
Likes: 317
I know a guy who had a 96 F150. He brought it to a exhaust shop to put true duals on and little did he know they didn't put the o2 sensor back. A few years later the motor burnt holes in the pistons from not having that sensor present. I would not recommend keeping that o2 sensor deleted. I have heard many similar stories of this happening.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The EFI system is crippled with the O2 sensor deleted... you may as well put a carb on it. But regarding the EGR, is there vacuum on the line going to the valve at idle?There should not be because that would definitely result in a rough idle, if there is vacuum then either the EVR solenoid is malfunctioning, the wiring to the solenoid has a short, the PCM has an internal problem, or somebody mistakenly connected the EGR valve directly to manifold vacuum. In either case simply disconnecting and capping that vacuum line would keep the EGR valve closed all the time, if that doesn't fix the rough idle then it wasn't the problem anyway.
Hotshot
Joined: Jul 2020
Posts: 10,268
Likes: 2,563
From: Near Salt Lake City
Think less EGR not delete
Your processor needs to see that EVP sensor voltage move while driving too or you get a sort of limp mode with no code besides EGR codes
I agree, check the codes after putting the O2 sensor back in there
You can put a plate (block off plate under the EGR valve) with a 1/4 inch hole in it
That lets the computer see valve movement and lets you get down the road
Enough EGR flow to cool the burn and not make NOx IMO
The 4.9s really benefit with that EGR restriction
We all breathe the same air, let the EGR flow a little
Your processor needs to see that EVP sensor voltage move while driving too or you get a sort of limp mode with no code besides EGR codes
I agree, check the codes after putting the O2 sensor back in there
You can put a plate (block off plate under the EGR valve) with a 1/4 inch hole in it
That lets the computer see valve movement and lets you get down the road
Enough EGR flow to cool the burn and not make NOx IMO
The 4.9s really benefit with that EGR restriction
We all breathe the same air, let the EGR flow a little
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