Which ECM?? Tried searching.
Hotshot
Joined: Jun 2015
Posts: 12,837
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…It’s stock other then the egr was removed years ago. (Ran fine for years before so I know it’s not the egr being remove) so sometimes it does throw the code for it but it has the dummy plug installed.
Sometimes the fuel pump sticks on with key on but recently hasn’t been doing that.
Sometimes the fuel pump sticks on with key on but recently hasn’t been doing that.
I agree. The computer is on its way out.
Cross-Country
Joined: May 2024
Posts: 50
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All else fails, you could always get a compatible ECM and then have it programmed to be the calibration you have. bubt this could be difficult, im not sure if ford dealers are still equipped to do this or not. If not, then youd be looking at the EEC-IV tuning crowd, and one of the big names in the sector recently shut down.
FTE Chapter Leader
Joined: May 2006
Posts: 12,338
Likes: 1,314
From: Central Mississippi
And the other thing about EGR is that it only functions a steady engine operating state. Never at idle, or acceleration or shifting gears. The ECU has to see steady state under load to implement the strategy.
Fleet Mechanic
Joined: Aug 2015
Posts: 1,835
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From: Candy Mountain
I found the EGR would be commanded open on acceleration after a min coolant temp was reached.
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Cross-Country
Joined: Aug 2020
Posts: 60
Likes: 3
i dont really know, the cat is a newer style then the original, i was told it was changed when the egr was blocked off. the original had that weird tube the runs from the cat up to the back of he heads, that pipe was removed along with plugging the back of the heads. Will be ordering an ecm.
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Cross-Country
Joined: Aug 2020
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Likes: 3
from what i was told it will still throw the code but the dummy plug is enough of a resistance to keep it from lighting the check engine light.
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Cross-Country
Joined: Aug 2020
Posts: 60
Likes: 3
was doing some more reading on the forums, some saying removing that tube and to the back of the heads can affect how the 02 sensor reads and affect the tune? i still think it may be a separate issue since its been like that for years before this issue arrived.
FTE Chapter Leader
Joined: May 2006
Posts: 12,338
Likes: 1,314
From: Central Mississippi
Any leak upstream or within about a foot down can monkey with the AFR readings of the O2.
Depending on model, usually you plug the air injection ports if they are on the back of a head, with 1 inch long 5/8ths, 11tpi bolts.
Some use copper washers, some grind a little taper & let the carbon do the sealing.
Depending on model, usually you plug the air injection ports if they are on the back of a head, with 1 inch long 5/8ths, 11tpi bolts.
Some use copper washers, some grind a little taper & let the carbon do the sealing.
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Cross-Country
Joined: Aug 2020
Posts: 60
Likes: 3
Any leak upstream or within about a foot down can monkey with the AFR readings of the O2.
Depending on model, usually you plug the air injection ports if they are on the back of a head, with 1 inch long 5/8ths, 11tpi bolts.
Some use copper washers, some grind a little taper & let the carbon do the sealing.
Depending on model, usually you plug the air injection ports if they are on the back of a head, with 1 inch long 5/8ths, 11tpi bolts.
Some use copper washers, some grind a little taper & let the carbon do the sealing.
the exhaust system is mostly new and has absolutely no leaks. 2 shops prior apparently went over that and fixed the y pipe and I did double check it myself. The o2 is brand new. It only has 1 o2 sensor.
Lead Driver
Joined: Jun 2021
Posts: 5,221
Likes: 805
youre going to need to have a modified calibration anyway, because without the AIR system (you dont need it with a modern aftermarket cat) your truck will fail it with codes periodically, if you dont care then you can probably ignore it but i would be annoyed lol.
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Cross-Country
Joined: Aug 2020
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