cmp ckp toggle yes and no sync
Thread Starter
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Senior User
Joined: Aug 2005
Posts: 108
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From: Canada,Ont.
cmp ckp toggle yes and no sync
is it nomal to have the cmp and the ckp to toggle between yes and no sync while the engine is running
2003 6.0l f350 monitered on an autoengenuity
2003 6.0l f350 monitered on an autoengenuity
Lead Driver
Joined: Mar 2010
Posts: 5,504
Likes: 256
From: Woodbridge, Ontario, CA
No, it isn't.
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Senior User
Joined: Aug 2005
Posts: 108
Likes: 0
From: Canada,Ont.
okay thanks, what would be the cause of this? Im thinking chaffing of wires , loose connections or faulty sensors, is there additional possible causes of the toggeling between yes and no?
Lead Driver
Joined: Mar 2010
Posts: 5,504
Likes: 256
From: Woodbridge, Ontario, CA
It sounds like you've covered all your bases. Does it switch between NO and YES randomly? Can you cause it to stall by wiggling the harness with the engine running (particularly the wiring by the secondary filter housing area)? Check the CMP sensor. If the engine block is rusted, the rust can cause the sensor to back out just far enough to cause it to lose a signal.
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Senior User
Joined: Aug 2005
Posts: 108
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From: Canada,Ont.
as you crank to start it goes to sync and as it runs it toggles back and forth for a few seconds for each toggle. very random but never says synced for more than about 6 seconds. I cant seem to make it change with moving wires and connectors . I wiil check the cmp . there is quite a bite of rust on block, how much backing out are you talking about
Lead Driver
Joined: Mar 2010
Posts: 5,504
Likes: 256
From: Woodbridge, Ontario, CA
as you crank to start it goes to sync and as it runs it toggles back and forth for a few seconds for each toggle. very random but never says synced for more than about 6 seconds. I cant seem to make it change with moving wires and connectors . I wiil check the cmp . there is quite a bite of rust on block, how much backing out are you talking about
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Senior User
Joined: Aug 2005
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From: Canada,Ont.
ok im going to do that, what are your thoughts about changing the whole engine harness, if the cmp is not it ,as to go over the entire harness again takes hours as Im sure you know, Im talking about cost of harness vs. time to check (and still have doubts about harness) I have not found any chaffing
Thanks
Thanks
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Lead Driver
Joined: Mar 2010
Posts: 5,504
Likes: 256
From: Woodbridge, Ontario, CA
ok im going to do that, what are your thoughts about changing the whole engine harness, if the cmp is not it ,as to go over the entire harness again takes hours as Im sure you know, Im talking about cost of harness vs. time to check (and still have doubts about harness) I have not found any chaffing
Thanks
Thanks
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Post Fiend
Joined: Oct 2009
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From: N. Fort Worth, tx
heres the deal you are loosing either crank or cam signal. to find out what one you would need to hook one channel to the cmp ckt and the other channel to the ckp circuit at the pcm and crank the engine while watching the wave form.
The issue you will have from there is understanding the wave form and how it should look. but one of the tech here like myself ,m-chan or vlonly should be able to help you on that.
The issue you will have from there is understanding the wave form and how it should look. but one of the tech here like myself ,m-chan or vlonly should be able to help you on that.