Won't start, confusing codes, need help!
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Senior User
Joined: May 2014
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From: N.E Oregon
Won't start, confusing codes, need help!
My truck will crank but will not fire. My preliminary investigation has left me and my neighbor confused.
Preliminary stuff:
NO fuel pressure at the schrader valve on fuel rail with key on.
A 'click" can be heard from the fuel tank after key is turned on. There used to be a distinctive "clunk" from engine bay when key is turned on, but no longer.
Pulled codes (KOEO) and they are:
11 system pass
66 MAF sensor input is less than maximum voltage. My truck is not MAF
36 I could find no definition for this code, any ideas on this one?
11 system pass
45 Coil 1 & coil 2 primary circuit failure
42 Heated Oxygen sensor (HO2S) circuit indicates system rich.
My neighbor independently pulled the codes and came up withe same as I. They are confusing to both of us. He thinks the PCM is toast.
This is my daily driver & I need to get it up. Any help would be appreciated. I do not know where to go from here.
EDIT: I forgot to add that the engine will temporarily fire using starting fluid.
Preliminary stuff:
NO fuel pressure at the schrader valve on fuel rail with key on.
A 'click" can be heard from the fuel tank after key is turned on. There used to be a distinctive "clunk" from engine bay when key is turned on, but no longer.
Pulled codes (KOEO) and they are:
11 system pass
66 MAF sensor input is less than maximum voltage. My truck is not MAF
36 I could find no definition for this code, any ideas on this one?
11 system pass
45 Coil 1 & coil 2 primary circuit failure
42 Heated Oxygen sensor (HO2S) circuit indicates system rich.
My neighbor independently pulled the codes and came up withe same as I. They are confusing to both of us. He thinks the PCM is toast.
This is my daily driver & I need to get it up. Any help would be appreciated. I do not know where to go from here.
EDIT: I forgot to add that the engine will temporarily fire using starting fluid.
Last edited by BocceMon; Feb 26, 2017 at 03:07 PM. Reason: more info
Thread Starter
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Senior User
Joined: May 2014
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From: N.E Oregon
My truck is obd1 which is 2 digit codes. I was told this on this forum some months ago. I am retrieving codes with a jump wire on the test module and reading the CEL blinks. Jump wire is connected to the single clip on the test module and the lower left on the large one.
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 21
From: Caracas, Venezuela
Yeah, I'm sorry but whomever told you this is wrong. OBD 1 shows 3 digit codes. Get a equus/INNOVA 3145 scanner, it's inexpensive and will make the job much easier. I'm also fairly sure you have fuel delivery problem, it could be as simple as a loose pigtail connector on the fuel pump or a broken fuel pump (check the fuel system fuse, it could be just that).
Thread Starter
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Senior User
Joined: May 2014
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From: N.E Oregon
I don't want to argue the code issue, I just want to find out why my truck does not start. Here is a link to OBD1 two digit codes:
https://straighttalkautomotive.com/~...ord-OBD-I.html
Thank you for the fuse idea. My book shows that there are two plus a relay. I will check them.
https://straighttalkautomotive.com/~...ord-OBD-I.html
Thank you for the fuse idea. My book shows that there are two plus a relay. I will check them.
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 21
From: Caracas, Venezuela
And here are 3 digit codes: OBD-I Diagnostic Trouble Code (DTC) Applications - Ford 3-Digit Codes I think only the 94 model trucks will have 2 digit codes. The fact you're getting a code related to MAF further proves the readings you got are either incorrect or 3 digit.
Thread Starter
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Senior User
Joined: May 2014
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From: N.E Oregon
And here are 3 digit codes: OBD-I Diagnostic Trouble Code (DTC) Applications - Ford 3-Digit Codes I think only the 94 model trucks will have 2 digit codes. The fact you're getting a code related to MAF further proves the readings you got are either incorrect or 3 digit.
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The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 21
From: Caracas, Venezuela
You didn't get the 111 code since there are several problem codes listed. Regarding the 114 code, it's the IAT (Intake Air Temperature) the name should be self-explaining, but it shouldn't cause a non-running condition, at most it would make the truck run rough. 116 points at ECT (Engine Coolant Temperature) sensor, it can cause the truck engine to run briefly then die. 636 probably points at either a bad reading from the transmission or overheating trans (not important right now, but look into it whenever possible). 542, this is the one you need to look into, definitely the cause of your no-start condition since it points at a problem with either the power supply to the fuel pump or the fuel pump itself, what I told you before is a good starting point to begin testing/checking. The ECM seems to be in good working order, or at least showing what it should.
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Thread Starter
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Senior User
Joined: May 2014
Posts: 139
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From: N.E Oregon
You didn't get the 111 code since there are several problem codes listed. Regarding the 114 code, it's the IAT (Intake Air Temperature) the name should be self-explaining, but it shouldn't cause a non-running condition, at most it would make the truck run rough. 116 points at ECT (Engine Coolant Temperature) sensor, it can cause the truck engine to run briefly then die. 636 probably points at either a bad reading from the transmission or overheating trans (not important right now, but look into it whenever possible). 542, this is the one you need to look into, definitely the cause of your no-start condition since it points at a problem with either the power supply to the fuel pump or the fuel pump itself, what I told you before is a good starting point to begin testing/checking. The ECM seems to be in good working order, or at least showing what it should.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
Codes 114, 116 and 636 are most likely caused by not warming up the truck before running the KOEO tests. When the truck does not run, I would expect these codes.
Code 542 may be your first clue.
Code 542 may be your first clue.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
And here are 3 digit codes: OBD-I Diagnostic Trouble Code (DTC) Applications - Ford 3-Digit Codes I think only the 94 model trucks will have 2 digit codes.
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Senior User
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From: N.E Oregon
So I checked fuse #16 in the main box and it was good. I had my son turn the key on/off several times and could feel the relay trying to actuate, so I'm thinking that is good. Oddly, I removed the battery to have it recharged as we had run it down to where the starter would only click. Upon installing the battery the fuel pump clearly ran for several seconds. We both clearly heard it, but there was no fuel pressure at the schrader valve on the fuel rail. Is there a way to "hot wire" the pump to definitively check it? Could this possibly be a clogged fuel filter? I've had the truck for 7 years and never changed it I'm ashamed to say.
Any ideas at all? Thank you for the help so far!
Any ideas at all? Thank you for the help so far!
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Yes, jumper Pins 2 & 6 together on the self-test plug.
Here is a photo from Subford
Yes it could be as simple as a plugged fuel filter.
Here is a photo from Subford
Yes it could be as simple as a plugged fuel filter.
Thread Starter
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Senior User
Joined: May 2014
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From: N.E Oregon
RESOLUTION AT LAST!
But it was not the fuel filter (what a PITA that has become!). After changing the fuel filter still no joy. "Hot wired" the pump again and heard it whirl. Checked fuses and relay again and the relay just felt weak to me. Took a hip-shot chance and replaced the relay and the truck fired up and purred like a kitten!
As an aside I am ashamed that I have neglected that fuel filter all this time. Thanks to all that helped the Growler get back on the road and saved this driver from driving the wife's Malibu everyday!