Random no start
Fleet Owner
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I lose track of the strategies for "buzzing". My 06 doesn't buzz every time the key is turned on.
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In the old days it was a LONG debate over where the rpm signal came from. Also, lots of folks look at cam and crank sensor codes as an indication of a problem w/ those sensors when some of those codes simply come from a stall or excessive crank situation. A lot depends on the exact code number - which is always a good thing to post.
I wouldn't expect an injector pulse width value if there are sync issues.
Good point on the trigger wheel. Often times if that wheel has an issue, then there might be cylinder contribution codes on "opposing cylinders" in the firing order.
I wouldn't expect an injector pulse width value if there are sync issues.
Good point on the trigger wheel. Often times if that wheel has an issue, then there might be cylinder contribution codes on "opposing cylinders" in the firing order.
So are you saying that you are 100% sure that 100% of the rpm signal is coming from the crank sensor on this engine? If so, what are your qualifications to say so? I only ask because when I come at my Diesel mechanic with this info, I don't want to tell him.... ya, I heard it from some guy on a forum..... lol!
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Well on that reply I would say do the old BYM trick. If you really are down to electrical issue.
When the crank no start happens, get under the hood and wiggle the harness. See what happens.
Next alternative would be just buy a harness or do some serious electrical diagnostics. I guess I would have pcm checked also. Probably do that first.
The shutting down at the light while running still has me thinking loose connection somewhere. Maybe a ground. You have two write there close to pcm.
When the crank no start happens, get under the hood and wiggle the harness. See what happens.
Next alternative would be just buy a harness or do some serious electrical diagnostics. I guess I would have pcm checked also. Probably do that first.
The shutting down at the light while running still has me thinking loose connection somewhere. Maybe a ground. You have two write there close to pcm.
-Ya, ive tried to make it stumble or fail when it is running by moving around wires, pushing them against stuff, ect….. however, armed with this refreshing information, I think I will look more closely at the Crank sensor connector and wiring.
-The shutting down thing only happened the first day that it started this saga, never happened again in the probably 3 months since.... so maybe there was another problem that got fixed along the way of all the troubleshooting that has been done.
Fleet Owner
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Just tell him to read up in the Ford PC/ED manual and in the FICM Guide.
Also, in the PC/ED manual it states: "Engine speed is determined by counting 15 windows on the crankshaft gear each crankshaft rotation" on page 5-68.
The WSM states: No SYNC and no RPM signal, typically is a faulty CKP sensor/circuit problem.
FICM Guide:
"SYNC is achieved when the PCM receives a signal from the Crankshaft sensor (CKP) indicating the sensor is working and the correct signal has been identified by the PCM. If the Crankshaft sensor is working improperly, the PCM cannot calculate engine speed or cylinder position, preventing fuel delivery."
https://mid-atlanticema.org/wp-conte...Tech-Guide.pdf
Also, in the PC/ED manual it states: "Engine speed is determined by counting 15 windows on the crankshaft gear each crankshaft rotation" on page 5-68.
The WSM states: No SYNC and no RPM signal, typically is a faulty CKP sensor/circuit problem.
FICM Guide:
"SYNC is achieved when the PCM receives a signal from the Crankshaft sensor (CKP) indicating the sensor is working and the correct signal has been identified by the PCM. If the Crankshaft sensor is working improperly, the PCM cannot calculate engine speed or cylinder position, preventing fuel delivery."
https://mid-atlanticema.org/wp-conte...Tech-Guide.pdf
Fleet Owner
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That is the one that can be generated by excessive cranks or after a stall event. It could even be caused by a shorted out injector coil.
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Fleet Owner
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When you come to the internet, you should always verify if it will cost much money.
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well, I just know from personal experience in my shop, that when a customer comes in and starts spewing information at us and said he read it on a forum, we usually roll our eyes and say... ya, ok.... there is just as much bad info out there as there is much good, and then show them the real info..... so, that's why I don't want my mechanic to have the same reaction. lol!
Fleet Owner
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well, I just know from personal experience in my shop, that when a customer comes in and starts spewing information at us and said he read it on a forum, we usually roll our eyes and say... ya, ok.... there is just as much bad info out there as there is much good, and then show them the real info..... so, that's why I don't want my mechanic to have the same reaction. lol!
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LOL - no one is 100%! I've even seen folks take a poll and the greatest response was wrong. Even DieselTechRon stated that the 04.5 HPOP came with the failure prone STC fitting that was updated w/ the one-piece fitting (and a few other things that weren't correct). It happens!
When you come to the internet, you should always verify if it will cost much money.
When you come to the internet, you should always verify if it will cost much money.
Yes! this is why I don't want to just toss new harnesses at it and blow 1000 bucks, and have it be something fixed way cheaper! lol!
Fleet Owner
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You can get OEM Ford parts from AutoNation White Bear Lake (internet sales) for a lot less than retail.
The main engine harness for your 06 is part number 5C3Z-12B637-BA - if you wind up needing it. Before going that route, there are electrical tests that should be done.
At AutoNation WBL that harness is $636.
https://parts.autonationfordwhitebea...y-5c3z12b637ba
The main engine harness for your 06 is part number 5C3Z-12B637-BA - if you wind up needing it. Before going that route, there are electrical tests that should be done.
At AutoNation WBL that harness is $636.
https://parts.autonationfordwhitebea...y-5c3z12b637ba
Thread Starter
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New User
Joined: Oct 2019
Posts: 21
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You can get OEM Ford parts from AutoNation White Bear Lake (internet sales) for a lot less than retail.
The main engine harness for your 06 is part number 5C3Z-12B637-BA - if you wind up needing it. Before going that route, there are electrical tests that should be done.
At AutoNation WBL that harness is $636.
https://parts.autonationfordwhitebea...y-5c3z12b637ba
The main engine harness for your 06 is part number 5C3Z-12B637-BA - if you wind up needing it. Before going that route, there are electrical tests that should be done.
At AutoNation WBL that harness is $636.
https://parts.autonationfordwhitebea...y-5c3z12b637ba