Check engine codes
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New User
Joined: Aug 2019
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From: Louisville
Check engine codes
Checked for codes on 94 5.0 to see if there was a clue why the engine would idle rough sometimes and if I pressed lightly on gas and let off it would die. But the codes I got seem to have nothing to do with it.
Codes I got were KOER 334 538 536 632
KOEO 334. I tried KOEO at first and nothing came up. Then I did the KOER and those came up and 334 was on when I tried engine off after running.
Also when I did KOER it flashed 4 times then the idle went steady at 1,200 to 1,500 for about 20 seconds. Then I started getting the codes.
Codes I got were KOER 334 538 536 632
KOEO 334. I tried KOEO at first and nothing came up. Then I did the KOER and those came up and 334 was on when I tried engine off after running.
Also when I did KOER it flashed 4 times then the idle went steady at 1,200 to 1,500 for about 20 seconds. Then I started getting the codes.
Hotshot
Joined: Jun 2015
Posts: 12,870
Likes: 2,443
334: is the sensor on the EGR valve. So yes, you could definitely have a rough idle if the EGR valve is allowing flow while at idle.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
5th Wheeling
Joined: Aug 2019
Posts: 37
Likes: 0
334: is the sensor on the EGR valve. So yes, you could definitely have a rough idle if the EGR valve is allowing flow while at idle.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
Thread Starter
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New User
Joined: Aug 2019
Posts: 6
Likes: 0
From: Louisville
334: is the sensor on the EGR valve. So yes, you could definitely have a rough idle if the EGR valve is allowing flow while at idle.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
538: you didn’t quickly floor and release the throttle ie operator error
536: brake switch is shorted. Do you have cruise control and/ or brake issues?
632: you didn’t press the OD switch. So once again operator error.
When performing the engine running test you you are required to do things and the computer is checking for a change in status. The increased idle during the test is also normal.
Thread Starter
|
New User
Joined: Aug 2019
Posts: 6
Likes: 0
From: Louisville
So I did the test in this https://www.google.com/amp/www.fullsizebronco.com/forum/23-technical-write-ups/218407-egr-valve-position-evp-sensor-testing-replacement.html%3Famp%3D1
thread and got good resistance numbers on the EVP sensor as well as 4.8 volts at the connector. So sensor seems to be good and it looks newer. I also put my finger over the EGR regulator with the cap off and the engine bogged down as it’s supposed to. I guess next is the vacuum check the egr valve. It does look quite rusted so it’s probably old.
thread and got good resistance numbers on the EVP sensor as well as 4.8 volts at the connector. So sensor seems to be good and it looks newer. I also put my finger over the EGR regulator with the cap off and the engine bogged down as it’s supposed to. I guess next is the vacuum check the egr valve. It does look quite rusted so it’s probably old.
5th Wheeling
Joined: Aug 2019
Posts: 37
Likes: 0
So I did the test in this https://www.google.com/amp/www.fulls...html%3Famp%3D1
thread and got good resistance numbers on the EVP sensor as well as 4.8 volts at the connector. So sensor seems to be good and it looks newer. I also put my finger over the EGR regulator with the cap off and the engine bogged down as it’s supposed to. I guess next is the vacuum check the egr valve. It does look quite rusted so it’s probably old.
thread and got good resistance numbers on the EVP sensor as well as 4.8 volts at the connector. So sensor seems to be good and it looks newer. I also put my finger over the EGR regulator with the cap off and the engine bogged down as it’s supposed to. I guess next is the vacuum check the egr valve. It does look quite rusted so it’s probably old.
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