Engine bucking/missing inconsistently. Got codes
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Senior User
Joined: Oct 2011
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From: Broadway, NC
Engine bucking/missing inconsistently. Got codes
Ok, took truck out for a drive it started to buck/jerk and engine hesitated all upon giving it throttle. But it was inconsistent.
KOEO: 565 (O) Canister Purge 1 solenoid/circuit failure - Solenoids
Not sure what that means...
KOER: 723....can't find what that code means anywhere
632: Transmission control switch
Not sure what that means either. I am worthless, I know
I would appreciate any guidance! Thank you in advance
KOEO: 565 (O) Canister Purge 1 solenoid/circuit failure - Solenoids
Not sure what that means...
KOER: 723....can't find what that code means anywhere
632: Transmission control switch
Not sure what that means either. I am worthless, I know
I would appreciate any guidance! Thank you in advance
Cargo Master
Joined: Jul 2009
Posts: 2,541
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From: Des Moines
I assume you're talking about the '93 in your signature?
Code 565: This code refers to the purge solenoid for the charcoal canister. It's either malfunctioning or there is a problem occurring (bad ground, bad signal, etc) when the computer instructs it to open and purge the canister.
Code 632 refers to the overdrive cancel switch. When you're running the KOER test, you need to press it on and off so the computer knows it's working. In short: operator error.
Are you sure it was code 723? Did you retrieve these codes with a scanner or counting CEL blinks? Likewise, I was unable to find a definition for it.
Code 565: This code refers to the purge solenoid for the charcoal canister. It's either malfunctioning or there is a problem occurring (bad ground, bad signal, etc) when the computer instructs it to open and purge the canister.
Code 632 refers to the overdrive cancel switch. When you're running the KOER test, you need to press it on and off so the computer knows it's working. In short: operator error.
Are you sure it was code 723? Did you retrieve these codes with a scanner or counting CEL blinks? Likewise, I was unable to find a definition for it.
Thread Starter
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Senior User
Joined: Oct 2011
Posts: 157
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From: Broadway, NC
I assume you're talking about the '93 in your signature?
Code 565: This code refers to the purge solenoid for the charcoal canister. It's either malfunctioning or there is a problem occurring (bad ground, bad signal, etc) when the computer instructs it to open and purge the canister.
Code 632 refers to the overdrive cancel switch. When you're running the KOER test, you need to press it on and off so the computer knows it's working. In short: operator error.
Are you sure it was code 723? Did you retrieve these codes with a scanner or counting CEL blinks? Likewise, I was unable to find a definition for it.
Code 565: This code refers to the purge solenoid for the charcoal canister. It's either malfunctioning or there is a problem occurring (bad ground, bad signal, etc) when the computer instructs it to open and purge the canister.
Code 632 refers to the overdrive cancel switch. When you're running the KOER test, you need to press it on and off so the computer knows it's working. In short: operator error.
Are you sure it was code 723? Did you retrieve these codes with a scanner or counting CEL blinks? Likewise, I was unable to find a definition for it.
ha ha ha...ok ok, yea well that wouldn't be the first time for me something was the cause of operator error----me being the operator
So, that explains why that code only came up the first time when I didn't hit that OD switch I retrieved the codes by shorting the EEC self test with a jumper wire. I counted CEL blinks and got 723, three times in a row. I don't even find any 700 series codes for any OBD1 engines.
I know it won't run while trying to go in gear. It idles great though, all day. Put 'er in drive, go down the road a bit and it starts doing it's thing.
So, I go home and check these codes and this is what I got.
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Senior User
Joined: Oct 2011
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From: Broadway, NC
Ok, so Ill check the codes again but, I read sometimes it flashes (CEL) flashes 3 times between codes. Is it possible I have a Code 72: Insufficient MAP change during Dynamic Response Test??
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Senior User
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From: Broadway, NC
Ok so I'll check them again. I know for sure the other code though. I was wondering about the 700 series codes......they all stopped at the 600's¡
Cargo Master
Joined: Jul 2009
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From: Des Moines
The charcoal canister is usually mounted in the lower right front side of the engine bay. What you really want to look for to find it is a vacuum hose that hooks into your throttle body that traces back toward the front of the engine bay. Spliced somewhere in that hose you should find a solenoid- that is the canister purge solenoid. It will look something like this: NAPA AUTO PARTS
That's what the code 565 is referring to. Either the solenoid is bad or there is a bad connection in the circuit that's causing it to not operate correctly.
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From: Broadway, NC
Ok great, I have located that under the hood...connection LOOKS good and the part aint exactly cheap cheap but not really expensive so Ill replace it.
Ive got to run the codes again and see about that 723 code....see what that was supposed to be.
Probably made an input error to start the dynamic test. Ill have to look at the procedure again and give it another go!
Thanks again....will report back
Ive got to run the codes again and see about that 723 code....see what that was supposed to be.
Probably made an input error to start the dynamic test. Ill have to look at the procedure again and give it another go!
Thanks again....will report back
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From: Rhode Island
Verify codes again. You may want to invest in one of those cheap Ford OBD-1 code readers, they're only about $20-30 or so.
If you are getting garbage codes however, I'd suspect a computer failure.
If you are getting garbage codes however, I'd suspect a computer failure.
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Senior User
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From: Broadway, NC
Ok will do. I will be able to later this evening...at the in-laws right now. Thank you for the info on a possible bad computer. I will see if I can get a cheap code reader....Ill probably need it in the future. I will try to jumper trick again and if it does throw me another 723, Ill have to check that computer.
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
Ok will do. I will be able to later this evening...at the in-laws right now. Thank you for the info on a possible bad computer. I will see if I can get a cheap code reader....Ill probably need it in the future. I will try to jumper trick again and if it does throw me another 723, Ill have to check that computer.
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Ok will do. I will be able to later this evening...at the in-laws right now. Thank you for the info on a possible bad computer. I will see if I can get a cheap code reader....Ill probably need it in the future. I will try to jumper trick again and if it does throw me another 723, Ill have to check that computer.
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
If that computer is bad....my father-in-law has a 302 (early 90's) with the computer on it still...would that work for a swap over?
Thanks again!
Thread Starter
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Senior User
Joined: Oct 2011
Posts: 157
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From: Broadway, NC
Ok I changed that canister purge solenoid and it seems to be doing MUCH better. I haven't driven it yet because I put some quiksteel over an exhaust leak and am going to let it sit a couple days to cure. From giving it gas however it seemed to have started better and when I goose the throttle it doesn't make that sputter sound so much.
Didn't have a chance to check codes again. That polar vortex is blowing right now in NC and am minimizing exposure since Ill be out in it all day tomorrow!! (stupid global warming)
One thing I did have and forgot...please tell me if this is a big deal. There is a "nipple" coming off of the passenger side-rear of the upper intake. It was plugged when I bought the truck. Now I have seen pictures of others like it and they had a hose going from there to the PCV valve. Would this help it run better having it unplugged going to PCV valve or not much difference? I hadn't done it yet because I didn't want to undo something that should be done!
The truck almost acted as though it were being choked when you gave it gas but would idle fine
Thank you very much gents
Didn't have a chance to check codes again. That polar vortex is blowing right now in NC and am minimizing exposure since Ill be out in it all day tomorrow!!
(stupid global warming)One thing I did have and forgot...please tell me if this is a big deal. There is a "nipple" coming off of the passenger side-rear of the upper intake. It was plugged when I bought the truck. Now I have seen pictures of others like it and they had a hose going from there to the PCV valve. Would this help it run better having it unplugged going to PCV valve or not much difference? I hadn't done it yet because I didn't want to undo something that should be done!
The truck almost acted as though it were being choked when you gave it gas but would idle fine
Thank you very much gents
Last edited by FX4-350; Jan 6, 2014 at 07:57 PM. Reason: additional info
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
The donor computer will not work for your truck since you have two different engines.