Dorman Front timing cover problems???
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Posting Guru
Joined: Nov 2003
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From: Concord, New Hampshire
Dorman Front timing cover problems???
Hi guys,
So i have a problem that is stumping me.. Just replaced a front cover on a 2002 f-350.. 7.3...
Used a dorman cover, as it was easy to get as the dealer one was not....
get the job done, truck wont run.. It sets a cam sensor code. PO344, and a 1670 code for feedback from the idm...
swapped out a known good ipr,
swapped out a known good cmp
No avail, codes are after short crank, and keep recurring..
Truck will " try to start" hit run for two or so seconds, lots of smoke, and die out...
Im almost thinking that the dorman cover has the wrong air gap? but looking for any ideas at this point, Im almost out of hair to pull out....
I have not been able to verify rpm signal to pcm, as my scan tool is not able to do live data while cranking, Hopefully will be demoing one tomorrow to try to get that information..
Thanks!!!!!!!!!!!
So i have a problem that is stumping me.. Just replaced a front cover on a 2002 f-350.. 7.3...
Used a dorman cover, as it was easy to get as the dealer one was not....
get the job done, truck wont run.. It sets a cam sensor code. PO344, and a 1670 code for feedback from the idm...
swapped out a known good ipr,
swapped out a known good cmp
No avail, codes are after short crank, and keep recurring..
Truck will " try to start" hit run for two or so seconds, lots of smoke, and die out...
Im almost thinking that the dorman cover has the wrong air gap? but looking for any ideas at this point, Im almost out of hair to pull out....
I have not been able to verify rpm signal to pcm, as my scan tool is not able to do live data while cranking, Hopefully will be demoing one tomorrow to try to get that information..
Thanks!!!!!!!!!!!
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
Have you pulled the CPS to make sure the gap wasn't too small and the cam gear didn't chew up the CPS? Have you measured the distance between the gear and cover? I didn't even know Dorman made a front cover for these engines.
How long have you tried cranking? You've got to build ICP oil and work the air out of the lines before the truck will run. What else did you do while you had the engine out?
How long have you tried cranking? You've got to build ICP oil and work the air out of the lines before the truck will run. What else did you do while you had the engine out?
Thread Starter
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Posting Guru
Joined: Nov 2003
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From: Concord, New Hampshire
I know the cmp is not touching as I swapped it out for one out of my personal truck wich I drove to my shop. And all I did was a front cover its pretty in depth as the engine was Out and pan off I see nothing left loose or not connected only those two codes.
And yes dorman makes a cover but I'd never use another!!
And yes dorman makes a cover but I'd never use another!!
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Posting Guru
Joined: Nov 2003
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From: Concord, New Hampshire
Alright well got it fugured out..
the Dorman front cover is JUNK... air gap of the cam sensor was way out of spec, By aprox .236"..........
I guess its time to re-pull the engine, as you cant make the sensor any longer!
the Dorman front cover is JUNK... air gap of the cam sensor was way out of spec, By aprox .236"..........
I guess its time to re-pull the engine, as you cant make the sensor any longer!
Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
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Posting Guru
Joined: Nov 2003
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From: Concord, New Hampshire
If 1998 was different I wonder if I run an older cam sensor if I can avoid changing the cover out?!?!
I'll be measuring up sensors tomorrow !!
And I know clay has the oem ones I checked him out before I started but it was a time crunch and the local parts store had a dorman in stock so I went with them. Big mistake
I'll be measuring up sensors tomorrow !!
And I know clay has the oem ones I checked him out before I started but it was a time crunch and the local parts store had a dorman in stock so I went with them. Big mistake
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Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Do you have live data reading capabilities?
Can you see the RPM signal? PW signal?
Inspect all the wiring for the cps?
Can you see the RPM signal? PW signal?
Inspect all the wiring for the cps?
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Posting Guru
Joined: Nov 2003
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From: Concord, New Hampshire
Yes had rpm signal but very dirty. I built up a sensor with spacer till I got it to touch cam gear and then subtracted .020 from That and machined sensor to set into that depth. Truck runs great but I'd like it to be a permanent repair as its a customer vehicle ....
Veteran/Sheepdog
Joined: Feb 2012
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From: Western AR
Here it is....notice that the trigger wheel has a tiny slot for #1 and on the opposite side of the wheel (180 deg out) there is an extra long "window" for the #4 cyl. This is how it reads the timing, with all the other cylinders being the same size "windows".
Post Fiend
Joined: Mar 2007
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From: Texas
C93 CPS for the OBS trucks (that's currently in my 02 now)
Recall CPS that Ford came out with for my 02 that ran ok, but when compared to the black one above, the idle was rougher
Does the front cover flare out where the CPS mounts where you could file it down perhaps, or did they just make it so wrong that it's too deep? I'm guessing that would effect oil pressure as well with too big a gap in front of the LPOP.
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
Make a spare and throw it in the glove box just to be on the safe side. You don't want a CPS failure to strand you.