Whats wrong code 0343
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From: TEWKSBURY MA
Whats wrong code 0343
I just installed maguson and car has been fine for a few days now his code 0343 high voltage cam. I can drive and does not come on then Ill start it another time and it comes on. Ill reset it and it stays off. Could wire just be pinched or somthing? Has any one seen this?
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This is usually an indication that your cam bolts cam loose. I have seen this a small handfull of times. Remove the timing cover and locktight the bolts. BTW, do not drive it anymore untill you do that!!
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St. Jude Donor '05-'08
Originally Posted by DOUG @ ECS
This is usually an indication that your cam bolts cam loose. I have seen this a small handfull of times. Remove the timing cover and locktight the bolts. BTW, do not drive it anymore untill you do that!!
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From: At the beach in little Rhody
I replied in another thread. Question to ECS, have you seen this on a low mileage car with a factory cam installation? I have seen this happen after a cam change, but not on a factory installed cam that hasn't been tampered with. Just curious.
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Originally Posted by vettenuts
I replied in another thread. Question to ECS, have you seen this on a low mileage car with a factory cam installation? I have seen this happen after a cam change, but not on a factory installed cam that hasn't been tampered with. Just curious.
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Here are some hints from the Service Manual. The last one is interesting since they may have moved some wiring around when installing the Magnuson.
The following conditions may cause this DTC to set:
Camshaft reluctor ring damage
The sensor coming in contact with the reluctor ring
Foreign material passing between the sensor and the reluctor ring
Excessive camshaft end-play
Wiring routed too close to secondary ignition components
Bill
The following conditions may cause this DTC to set:
Camshaft reluctor ring damage
The sensor coming in contact with the reluctor ring
Foreign material passing between the sensor and the reluctor ring
Excessive camshaft end-play
Wiring routed too close to secondary ignition components
Bill
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From: TEWKSBURY MA
I took a look at it and the wiring from sensor was right next some other wires from the coils I think. I move them apart. Car was hard to start first time. Then it was fine. I started car about a half dozen different times started fine and no code. I noticed were the wire plugs into harness it has a metal clip on it and is not hooked into anything just laying there. Any advice were it should hook into?
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From: At the beach in little Rhody
I hope you can see it, the shots aren't very good. The first one shows the sensor and the black connector. The opening in the connector is towards the driver's seat. In the second picture, the plug that goes into the connector is shown. Hope this helps.
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From: TEWKSBURY MA
Thanks for the pics Vettenuts. I moved wires around took car out for a ride seemed fine. So i got into it a liitle bit and light came on. When I went home 343 code again and also U1000 does anyone have any ideas?
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From: At the beach in little Rhody
U1000 is Loss of Communication Undetermined
This is related to the module reporting data according to the service manual. Wonder if any of the knock sensor wires or anything else got squished during the Magnusen installation. How hard is the unit to pull back off, is it easy like the intake? I think I would start there, and if nothing is found you really need to consider the cam bolts. About the only other long shot is the battery, which when they start to go seem to generate some bizzare errors.
This is related to the module reporting data according to the service manual. Wonder if any of the knock sensor wires or anything else got squished during the Magnusen installation. How hard is the unit to pull back off, is it easy like the intake? I think I would start there, and if nothing is found you really need to consider the cam bolts. About the only other long shot is the battery, which when they start to go seem to generate some bizzare errors.
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From: TEWKSBURY MA
Should the balancer pull off the same even that its been pinned? I think I should just take it apart and check for piece of mind. I dont want to loose motor with 2000 miles on it. Does anyone know roughly how long it should take to do this? Ill be doing it my garage on jack stands. I had maggie installed but just dont have money to put out to check this problem. I want to that you guys for all your help.
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From: At the beach in little Rhody
Well, since its supposed to rain for the next week, that should be enough time. You need to make sure you have all the parts you need for this, timing cover gasket, front seal. I would also replace the balancer since they are press fit. You will need a new bolt as well.
When are you going to take this on?
When are you going to take this on?
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From: TEWKSBURY MA
I have only put about 100 miles on it since maggie has been installed. They sent a new bolt with kit and balancer is pined do you think I will be alright with those two things? I going to get timing cover gasket , front seal and I would think I need water pump gaskits also. I think I am going start to work on it tomorrow. The summer nationals starts friday in Worchester and I already regerstered my car, I realy want to bring it there this weekend, but want to have piece of mind that I wont loose motor on the way.
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From: At the beach in little Rhody
Water pump gasket, yes that too. I also picked up o-rings for the steering lines that go into the steering box. I have a procedure I put together for the cam change I did based on LS1howto.com since they did heads at the same time on the web site, I can e-mail that to you if it would help. If the bolts have backed out, pick up some red locktite, clean the bolts and cam threads real good and loctite the bolts back in again. You might want to pick up the ARP cam bolts for the LS1, they are only about $6 and are much better bolts. Not to spend too much of your money, but the GMPP timing chain damper is a great addition if you have the timing cover off the car. It helps keep the timing chain from wrapping on the lower gear at high RPM.
Since Magnacharger end pins the damper, you will be OK but you might want to call them about how to re-install once you remove it, pin alignment is the question I always had. Also, you need a tool to press the damper back on again. Don't use a bolt. Here is one I made, wish I were closer I could lend it to you.
Since Magnacharger end pins the damper, you will be OK but you might want to call them about how to re-install once you remove it, pin alignment is the question I always had. Also, you need a tool to press the damper back on again. Don't use a bolt. Here is one I made, wish I were closer I could lend it to you.
Last edited by vettenuts; Jun 26, 2006 at 05:47 AM.
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Vettenuts, sorry for not replying earlier. I have only seen this on stock engines, most shops locktight the bolts (or should) when a cam is installed so it is very unlikely. 
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From: At the beach in little Rhody
Paul4137,
I tried to PM you but got an error so not sure if you got it. I can lend you my tool for re-installing the damper. Shoot me a mailing address, the other option is I am not too far from you, I am in Rhody. You can ship it back to me when you are done. I can send you my procedure for the cam change, hopefully it will be helpful.
Let me know.
I tried to PM you but got an error so not sure if you got it. I can lend you my tool for re-installing the damper. Shoot me a mailing address, the other option is I am not too far from you, I am in Rhody. You can ship it back to me when you are done. I can send you my procedure for the cam change, hopefully it will be helpful.
Let me know.