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Old 02/23/2011, 04:53 AM   #1 (permalink)
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Camshaft Position Sensor problem

Hey guys, I've got a bit of a problem.

I have noticed a misfire and decided to check out what was causing it. I checked spark / air and fuel, and found no issues. Then I looked at my timing belt and saw that it was particularly loose. So I bought a new timing belt hydraulic tensioner, since I already changed the belt, pulleys and water pump, the tensioner concluded my maintenance. Once everything was back up and put together, I turned on the car. I still had that misfire. So I ran the car for a bit, and then it died out. Since air, spark and fuel were good, I immediately thought Crankshaft Position Sensor has gone bad, and hooked up a scanner and read that my Camshaft position sensor was throwing a code, P0340. So I looked at my sensor and found the wires were bent, cracked and exposed. I replaced the wires and now the car wont start. It turns over just fine, but just doesn't start. I checked for spark and there is none.

Weird thing is that I cannot find a camshaft positioning sensor for purchase. So what is my scanner talking about? And what does code P0340 truly mean?
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Old 02/23/2011, 08:50 AM   #2 (permalink)
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Quote:
Originally Posted by LostSoul View Post
Hey guys, I've got a bit of a problem.

I have noticed a misfire and decided to check out what was causing it. I checked spark / air and fuel, and found no issues. Then I looked at my timing belt and saw that it was particularly loose. So I bought a new timing belt hydraulic tensioner, since I already changed the belt, pulleys and water pump, the tensioner concluded my maintenance. Once everything was back up and put together, I turned on the car. I still had that misfire. So I ran the car for a bit, and then it died out. Since air, spark and fuel were good, I immediately thought Crankshaft Position Sensor has gone bad, and hooked up a scanner and read that my Camshaft position sensor was throwing a code, P0340. So I looked at my sensor and found the wires were bent, cracked and exposed. I replaced the wires and now the car wont start. It turns over just fine, but just doesn't start. I checked for spark and there is none.

Weird thing is that I cannot find a camshaft positioning sensor for purchase. So what is my scanner talking about? And what does code P0340 truly mean?
The reason you can't find a camshaft position sensor for purchase is because it's built into the distributor. So now when shopping for a distributor make sure you get one for a 2002-2005, not a 2000-2001.
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Old 02/24/2011, 01:20 AM   #3 (permalink)
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Thanks for the reply fin, so you're saying to get that plug that goes down where my lower intake mani is, I would have to buy a brand new distributor? If that was the case, why in the hell would they make a separate plug for the sensor itself? This doesn't make sense. It has a plug in the engine bay named A, its a gray plug, thats the cam pos sensor right?

Where does that sensors wire, lead to? I traced it to the firewall. Might be wrong though.
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Old 02/24/2011, 08:45 AM   #4 (permalink)
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Originally Posted by LostSoul View Post
Thanks for the reply fin, so you're saying to get that plug that goes down where my lower intake mani is, I would have to buy a brand new distributor? If that was the case, why in the hell would they make a separate plug for the sensor itself? This doesn't make sense. It has a plug in the engine bay named A, its a gray plug, thats the cam pos sensor right?

Where does that sensors wire, lead to? I traced it to the firewall. Might be wrong though.
The knock sensor is the plug you're probably referring to, the camshaft position sensor on a V6 is built inside the distributor. Search the service manual or this forum if you don't believe me. You don't HAVE to buy a brand new distributor, you could buy a used one. Do another check on the crankshaft position sensor wiring because if that is somewhat messed up then it can cause your problem. If the crank wiring is fine then start preparing to get another dizzy. I have a used one which I believe is for a 2000-2001, I have to check to make sure. If you need one I'll sell it to you for cheap after I confirm it's functional.
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Whens the car going to be finished with the turbo and everything on it

Quote:
Originally Posted by PharmEcis View Post
Kevin: It'll be done when I'm done with it... ;)
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Old 02/24/2011, 07:23 PM   #5 (permalink)
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Quote:
Originally Posted by finesse49ers View Post
The knock sensor is the plug you're probably referring to, the camshaft position sensor on a V6 is built inside the distributor. Search the service manual or this forum if you don't believe me. You don't HAVE to buy a brand new distributor, you could buy a used one. Do another check on the crankshaft position sensor wiring because if that is somewhat messed up then it can cause your problem. If the crank wiring is fine then start preparing to get another dizzy. I have a used one which I believe is for a 2000-2001, I have to check to make sure. If you need one I'll sell it to you for cheap after I confirm it's functional.
I may be referring to it, I am not completely sure. All I know is, there are two plugs, one gray and one black, one has an A on it (gray) and the other B (black) The letter B plug, goes down to my crankshaft. The letter A plug, goes down to where my lower intake manifold is.

Also I went to AutoZone and they are saying that my eclipse has an independent cam pos sensor. Its a 2004 V6 engine.

So maybe this A plug is just coincidental, I may just have to replace those wires and buy a new cam pos sensor.
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Old 02/24/2011, 08:35 PM   #6 (permalink)
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Quote:
Originally Posted by LostSoul View Post
I may be referring to it, I am not completely sure. All I know is, there are two plugs, one gray and one black, one has an A on it (gray) and the other B (black) The letter B plug, goes down to my crankshaft. The letter A plug, goes down to where my lower intake manifold is.

Also I went to AutoZone and they are saying that my eclipse has an independent cam pos sensor. Its a 2004 V6 engine.

So maybe this A plug is just coincidental, I may just have to replace those wires and buy a new cam pos sensor.
Well all I know is the Camshaft Position Sensor is in the distributor, if it's faulty you'll need to replace the whole unit, plain and simple no getting around it. Forget what AutoZone told you and check to make sure your Crankshaft Position Sensor is fully functional.
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Quote:
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Whens the car going to be finished with the turbo and everything on it

Quote:
Originally Posted by PharmEcis View Post
Kevin: It'll be done when I'm done with it... ;)
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Old 02/26/2011, 06:13 PM   #7 (permalink)
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Not to say you're wrong or put you on the spot, but this is just confusing the shit out of me...check this out: Master Pro Ignition 2-96116 - Camshaft Position Sensor | O'Reilly Auto Parts

Camshaft Position Sensor | 2004 Mitsubishi Eclipse 6 Cylinders H 3.0L SFI | AutoZone.com

I am going to call the dealer and see what they say. I do also think nonetheless that it is in the distributor, hence I cannot see it anywhere.
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Old 02/28/2011, 04:38 PM   #8 (permalink)
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Thanks Fin, I bought a used distributor for 80 dollars shipped. Sure as hell beats 270 from autozone.

Their system is fucked up I guess, because obviously, these boards would know much more than autozone about our 3g's. So idk why they were pulling up an individual CMP / CPS sensors.

Once again, thanks Fin
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Old 02/28/2011, 05:29 PM   #9 (permalink)
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No problem.
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Building THE GREATEST 3G to date and possibly EVER built by PharmEcis. MIVEC 6G75 Turbo 5 Speed AWD.

This is what I'm about: The 3G, 1998 GSX, EVO IX GSR.

Quote:
Originally Posted by kevin711 View Post
Whens the car going to be finished with the turbo and everything on it

Quote:
Originally Posted by PharmEcis View Post
Kevin: It'll be done when I'm done with it... ;)
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Old 02/28/2014, 07:52 PM   #10 (permalink)
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harre24 : who are you?
have a 04 eclipse gt 3.0l - changes timing belt, crank shaft sensor, tensioner water pump.
Car flood and would not start - took to a mechanic - they said it was main computer and MAF sensor they said crank shaft and cam shaft sensor were testing fine.
Charged 235 for information and didnt fix anything. Replaced MAF sensor - runs now but showing codes for Crank shaft sensor and also camshaft sensor. Since crankshaft sensor is new obviously not that.
at a loss. just throwing parts at it.
Thinking about trying a distributor.
any thoughts?????
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