Cps
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Senior User
Joined: Feb 2011
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From: Stanley nc
Cps
I have a 02 7.3L and everytime it rains it jerks going down the road or if I'm sitting it will cut off and crNk by up with no problem. Could this be the cps. I don't know much about this sensor. I've replaced it 3 times but it's never acted like this
Elder User
Joined: Jun 2007
Posts: 705
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From: Sandia Park, NM
CPS harness is the plug you unplugged and plugged back in when you changed the CPS. I can't remember if you can get your hand to it with the truck running or not. You want to be able to wiggle that plug around with the truck running. Please don't hurt yourself. If you can make the truck die by wiggling, you'll have to order a new pigtail and solder it in. I went through 3 ICP sensors before I figured out it was the plug and not the sensors themselves.
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From: Stanley nc
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Hotshot
Joined: Jan 2002
Posts: 17,988
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From: La La Land
Since it's doing it in the rain, you should know that sometimes the windshield-wiper motor electrical "noise" gets the PCM confused with the pulses from the CPS, and it loses it's place calculating the proper injector firing. It shuts down for safety (wouldn't want a shot of fuel injected at the wrong time), but will "find itself" and continue on.
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Postmaster
Joined: Jan 2009
Posts: 4,006
Likes: 1
From: AL, Reform
Since it's doing it in the rain, you should know that sometimes the windshield-wiper motor gets the PCM confused with the pulses from the CPS, and it loses it's place calculating the proper injector firing. It shuts down for safety (wouldn't want a shot of fuel injected at the wrong time), but will "find itself" and continue on.
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
It still could be a water leak, but I'm only suggesting another thing to help find the real cause.
Since it's so easy to check, and he's replaced three CPS, it couldn't hurt to see.
Pop
Since it's so easy to check, and he's replaced three CPS, it couldn't hurt to see.
Pop
Laughing Gas
Joined: Nov 2010
Posts: 1,193
Likes: 2
From: D.C. but heart's in TEXAS
Since it's doing it in the rain, you should know that sometimes the windshield-wiper motor electrical "noise" gets the PCM confused with the pulses from the CPS, and it loses it's place calculating the proper injector firing. It shuts down for safety (wouldn't want a shot of fuel injected at the wrong time), but will "find itself" and continue on.
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Sometimes replacing the CPS will cure the problem, sometimes putting electrical noise filters on the windshield motor will do the job.
Does it do the same thing in "low-speed wipers" as "high-speed wipers"? There are two separate motor power inputs. If it acts differently in one speed than the other, you may have found the cause of the engine problem.
It's a place to begin to look........
Pop
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
Most likely the CPS as it is a pretty common problem. I would try cleaning it with an electrical contact cleaner. Then reconnect and spray the outside with a silicone spray to keep the water out. It could just be the connector is getting water in it.
It could also be a short in the wire harness on the engine. Many times a short will trigger similar issues you describe.
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Butch(OH)
1994.5 - 1997 7.3L Power Stroke Diesel
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May 16, 2008 03:06 PM
