Pulled Some Codes Today....
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From: Rochester, MN
Pulled Some Codes Today....
Alright, well my truck has been idling like crap (gets better as it warms up), and the CEL has been coming on and off intermittently. I pulled the codes and this is what I came up with, if I read them correctly:
KOEO: 565
Continuous Memory: 79, 327, 332
KOER: 411, 538
Any of you gurus out there have any ideas? The truck is a '93 with the 4.9.
KOEO: 565
Continuous Memory: 79, 327, 332
KOER: 411, 538
Any of you gurus out there have any ideas? The truck is a '93 with the 4.9.
Last edited by jcgonzal; Dec 20, 2009 at 07:51 PM. Reason: forgot a liter :P
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From: Long Beach Calimexifornia
I'd look around for a Vac leak. Don't have the A/C on during the test. Check & clean Sensor connections & the canister purge solenoid connection. Also ground wires. I'm guessing a couple codes are from Idle surging during the test?
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From: Rochester, MN
yeah, this is the first time i've done the engine running test, and the idle was doing some crazy stuff when i first fired it up. i'll have to take a closer look. and the AC definitely wasn't on.
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From: Long Beach Calimexifornia
#79 = A/C on during test (trucks only). Also the KOEO & KOER Tests should be done w/ engine at norm op. temp.
Last edited by ymeski56; Dec 20, 2009 at 04:36 PM.
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[/QUOTE]Any of you gurus out there have any ideas? The truck is a '93 with the 3.9.[/QUOTE]
I'd go back to the guy you bought it from and ask him why he didn't just sell you the whole 4.9 L's! Probably just sitting in his garage, getting dusty.
I'd go back to the guy you bought it from and ask him why he didn't just sell you the whole 4.9 L's! Probably just sitting in his garage, getting dusty.
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From: Rochester, MN
haha whoops, my bad. i got it right in my sig at least. 
and i am absolutely 100% certain my ac wasn't on, i turned everything off when i did the test....so there must be something crazy going on.
and i am absolutely 100% certain my ac wasn't on, i turned everything off when i did the test....so there must be something crazy going on.
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Maybe you mis-read it, or mis-wrote. There's alot more popular ones than that. I've never seen it come up before. Counting flash or Code reader?
Last edited by ymeski56; Dec 20, 2009 at 09:11 PM.
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From: Rochester, MN
I was counting the flash. I did it a couple times just to try and make sure, but I'm still not 100% with those damn things. I tried O'Reilly's code reader, but it kept saying it couldn't read. I think there's a shop around here that will do it for free, so maybe I'll try that next.
565= canister purge circuit failure, I wouldn't worry about that one just yet.
79=A/C or defrost on during test
327= EVP circuit below minimum voltage
332= insufficient EGR flow detected
411= cannot control rpm during KOER low RPM check
538= insufficient RPM change during KOER dynamic response test, you didn't floor the gas when the computer asked.
The others sound like an EGR problem, or a problem with the EVP or wires to it.
79=A/C or defrost on during test
327= EVP circuit below minimum voltage
332= insufficient EGR flow detected
411= cannot control rpm during KOER low RPM check
538= insufficient RPM change during KOER dynamic response test, you didn't floor the gas when the computer asked.
The others sound like an EGR problem, or a problem with the EVP or wires to it.