• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Trouble History With Camshaft Position Sensor

Have You Had To Replace Your Camshaft Position Sensor

  • Yeah, Ive had to replace it once

    Votes: 5 35.7%

  • Yeah, Ive had to replace it twice

    Votes: 0 0.0%

  • Yeah, I keep spares on my key chain it goes bad so often

    Votes: 0 0.0%

  • No. What the heck is a camshaft position sensor

    Votes: 9 64.3%
  • Total voters
    14
SyntheticShield

SyntheticShield

New member
Im doing a poll to see how many of you have had trouble with your Camshaft Position Sensor. Specifically I want to collect information on multiple sensor replacements.

Please, PLEASE, be serious and keep things on topic. I joke around a lot because I want to keep things light and fun, but I need the information to be as accurate as possible and all the participation that can be had.
 


ive never had to change mine, but i know how to if i ever need to.

as i recall, the symptoms are that the car starts, but dies shortly thereafter and you cant keep it running.
 
From my experience on the forums, the crank position sensor is more likely to go bad than the cam position sensor. I believe, but don't quote me, that if the cam position sensor goes bad, the car will still run, but timing advance won't work. So your car will be very sluggish. But a bad crank position sensor will not let the car run at all.

And I have never replaced either. :th_winking:
 
Zef_66 said:
But a bad crank position sensor will not let the car run at all.
Click to expand...

You are right to a point. If the side of the CPS that controls the tach signal goes bad, it may stall or you'll loose traction control but it will in many cases will still run. If the side that controls spark goes out, then obviously the engine wont run.
 


SyntheticShield said:
You are right to a point. If the side of the CPS that controls the tach signal goes bad, it may stall or you'll loose traction control but it will in many cases will still run. If the side that controls spark goes out, then obviously the engine wont run.
Click to expand...

If you want to move this to another thread, feel free to keep this one clean.

I am not electronic guru or anything, but I would image the crank position sensor just measures the position of the crank at certain times and reports them to the PCM. From there, the PCM will tell the tach what RPM to read. Also, the PCM will tell the ICM when to fire what cylinder based on the appropriate spark tables. And the traction control is also controlled through the PCM based on the measured and controlled sprak. Again, don't know for sure, but my guess is that spark, TC, and tach are all controlled by the same sensor reading of the CPS and when that sensor goes bad, everything gets fubared.
 
I had a diagram somewhere that showed the layout of the CPS and its signals. All of them, if I remember correctly went directly to the Ignition Control Module, then from there to the PCM. I'll see if I can dig it up.

What made it odd is that the CPS and Cam sensor operated off 10vdc which was really weird and I couldnt figure out how they were stepping that down from the normal system voltage until I saw it went through the ICM which apparently is providing some voltage regulation. But there are two distinct signals provided by the CPS triggered by the interrupters on the back of the harmnonic balancer.
 
SyntheticShield said:
I had a diagram somewhere that showed the layout of the CPS and its signals. All of them, if I remember correctly went directly to the Ignition Control Module, then from there to the PCM. I'll see if I can dig it up.

What made it odd is that the CPS and Cam sensor operated off 10vdc which was really weird and I couldnt figure out how they were stepping that down from the normal system voltage until I saw it went through the ICM which apparently is providing some voltage regulation. But there are two distinct signals provided by the CPS triggered by the interrupters on the back of the harmnonic balancer.
Click to expand...

Good to know. I never really looked into it. And since you looked at the diagrams, I will take your word for it. :th_peaceout:
 
Nah, dont take my word for it, Im just as fallible as anyone and as subject to making mistakes as anyone. But I did post up the diagrams, they just were in another thread somewhere dealing with a Coolant Sensor issue.
 


this is sounds like the issue i've been having. it just got worst tonight and i almost didn't make it home. had the codes checked a few weeks ago and it threw the code for the cam shaft positioning sensor. didn't realize that it would get this bad this quick.
 
ive havent had to replace mine yet. i just bought the car in november and have put about $3000 in repairs into it, so who knows with this pile of sh**, i might be replacing mine next week
 
You must log in or register to reply here.
Back
Top