engine codes
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Junior User
Joined: Aug 2003
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From: CA
engine codes
I have a 1990 f350 4x4 crewcab 460 motor ,checked codes twice using MIL -both times i got code 777 & 465. i couldnt find these on the code lists. does anyone know these codes or did i mess up the test?
Thread Starter
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Junior User
Joined: Aug 2003
Posts: 58
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From: CA
engine codes
thanks for the reply Egor, yes i too expected 2 digit codes. im going to try it again when i put it back together i had to
do a valve job. as far as my truck go's i had a rough idle driving me nuts. i never had a check engine light "on" i just did a compression test (low on one cyl.) , and checked codes.. my test went like this. warmed up truck to temp, turned off , put jumper wire on correct terminals under hood, started truck and waited.1st i got 4 flashes then truck idled up to 1600 RPM then down to 600 then back to 1600 then 600 couple seconds later got 1 flash couple seconds later 2 quick flashes.couple seconds later got 7 flashes pause 7 flashes pause 7 flashes longer pause then got 4 flashes pause 6 flashes pause 5 flashes. it repeated this twice then stopped. another think i noticed was that after testing my truck no longer idled at 750 like it should it only did 600. is it possible my codes might be 7 4 6 & 5
do a valve job. as far as my truck go's i had a rough idle driving me nuts. i never had a check engine light "on" i just did a compression test (low on one cyl.) , and checked codes.. my test went like this. warmed up truck to temp, turned off , put jumper wire on correct terminals under hood, started truck and waited.1st i got 4 flashes then truck idled up to 1600 RPM then down to 600 then back to 1600 then 600 couple seconds later got 1 flash couple seconds later 2 quick flashes.couple seconds later got 7 flashes pause 7 flashes pause 7 flashes longer pause then got 4 flashes pause 6 flashes pause 5 flashes. it repeated this twice then stopped. another think i noticed was that after testing my truck no longer idled at 750 like it should it only did 600. is it possible my codes might be 7 4 6 & 5
Last edited by ssap108; Aug 19, 2003 at 10:34 PM.
Senior User
Joined: Jun 2003
Posts: 352
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From: Tillamook, Ore
engine codes
That's a little too confusing for me. I think I only paid about 30 bucks for my digital reader, it's pretty simple to use and it stores the codes so I don't have to write or remember anything. Sorry I couldn't be more help.
New User
Joined: Aug 2003
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engine codes
very knew to this testing.. but what i have been reading, older models use the OBD-1 codes.
it seems the codes you are getting is for the KOER (Key on Engine Running) [you said you have the engine off]... but like i said I am new..
12 RPM not withing self test upper limit
74 Brake on/off switch failure
77 wuie open throttle sensed during self-test
65 can't find...
my tester tells me to complete all the tests first, KOEO (key on engine off), the KEOR... to make sure the test runs smoothly..
shawn. (newbie)
it seems the codes you are getting is for the KOER (Key on Engine Running) [you said you have the engine off]... but like i said I am new..
12 RPM not withing self test upper limit
74 Brake on/off switch failure
77 wuie open throttle sensed during self-test
65 can't find...
my tester tells me to complete all the tests first, KOEO (key on engine off), the KEOR... to make sure the test runs smoothly..
shawn. (newbie)
New User
Joined: May 2004
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just did the same test today after i swaped out dist., after KOER stops flasing all the codes it idlels at a certain rpm so that you can set timing properly, if you stop during this test you will have to reset base timing.
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
^ the computer just runs the advance up so you can make sure the computer advance is working. You don't have to change base timing if you turn the truck off or end the test after the codes are flashed.
