CPS install angle
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Junior User
Joined: Dec 2005
Posts: 56
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CPS install angle
I have just replaced the CPS on my 1996 auto with the new grey unit for 97 an up. The truck seems to be running fine but now when I start either cold or warm it turns over quite fast for about 2 seconds or a litle more. Much like when you advance a distributor on a gas engine. Previously it has never cranked for even a second. I put the old unit back in and she starts in under a second. I replaced it as it (i think) was starting to fail as the truck would miss sometimes when driving and sometimes would almost stall when idling in park.
If i enlongate the holes on the bracket and change the angle of the CPS would it make any difference? I'm not quite sure how the siginal is picked up.
Thanks
If i enlongate the holes on the bracket and change the angle of the CPS would it make any difference? I'm not quite sure how the siginal is picked up.
Thanks
Fleet Mechanic
Joined: Feb 2004
Posts: 1,816
Likes: 3
From: River Valley AR
I had the same sensor on a DT466 and there was an issue with the sensor being too far away from the gear. You might have a depth issue, but I would definitely not try to advance or retard that sensor. Check your 2 sensors and compare the installed height to see if there is a difference. On the DT466 it was a very big affair because the gear had moved rearward in the engine. I'l bet your new sensor is shorter.
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Post Fiend
Joined: Oct 2003
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From: MICHIGAN
There is no way you can advance or retard the CPS. It senses holes on the cam gear and sends a digital signal to the PCM. It's a hall effect sensor, just a fancy name for a magnet sensor. The closer you can get it to the gear the stronger the signal gets. The stronger the signal the less likely that electronic noise will interfer with it. The problem with this design is the cam moves fore and aft so you can't get it very close or the two will hit each other.
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Junior User
Joined: Dec 2005
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OK Itook it out and measured it against the original. It's the same length but 4mm less in diameter. I believe I can live with it until I get a spare. I should be carying one anyway. Thanks for all the feedback.
Post Fiend
Joined: Oct 2003
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From: MICHIGAN
Originally Posted by c00nhunterjoe
sure you can jim, to advance or retard it all you have to do is drill a new hole in the ft cover!
Elder User
Joined: Feb 2005
Posts: 712
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From: Marietta, OH/Weirton, WV
I believe ith works just like our speed sensors in the deeres...simply a magnetic pickup that senses CAM gear location, only ours senses flywheel position...same idea absolutely no way to adjust the timing but with the deeres you can adjust in and out to adjust for a stronger or weaker signal no change in timing but if its not less than 1 turn away it will not start or sometimes it will but it will run bad.
---------------------Jeremy
---------------------Jeremy
Lead Driver
Joined: May 2007
Posts: 8,608
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From: Belair md
i beg to differ, take the hall effect sensor on the ranger's distributors, remember you had to have the special tool to set the hall effect? i am pretty sure the cam sensor on ours works the same way, since the cam gear pick-up is keyed, if you move the sensor's position in the front cover then it will read cylinder 2 and 4 earlier or later in it's rotation
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
NO!, good god its all in fun! dont ever try that, the amount you would have to move the sensor to advance the timing is so small that you dont have the room in the cover to do it, in order for that to work you would have to egg the existing cam sensor hole out and after that it would never sit right and leak like a siv. if you want to advance you fuel timing then cut the wire on your engine oil temp sesnor and instal a 5k resistor inline going to the pcm. that will work wonders for you