Misfire after timing chain job 5.0

Scott Gissel

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Here is an update. I dove back into the timing chains and found that I was a tooth off on the exhaust cam on bank two. I also discovered that I had not tensioned the chains correctly the first time around. So I remedied those things, and checked timing again. Everything lined up and all tools locked into place. I have since put the car back together, and once again I have cam correlation codes on bank 2 A & B. Is it possible that I am getting these codes because I’m dealing with bent valves on that head? Or am I missing something? Any help is appreciated.
 

rolledover

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I was able to get the car started this evening. To answer your original question it idled correctly right away. I wouldn't think a bent valve would cause only camshaft correlation codes, you would be getting misfires as well. I had a burnt valve on cylinder 7 and was getting P0307 and p0316 codes, as well as a very lumpy idle. The misfire stopped at any rpms above idle. You could do a leak down test to see if there are any valve issues. Is it possible you've got wires crossed for the cam sensors on that timing cover? Maybe bad cam sensors? I'm not really sure, just trying to throw some ideas out there. Feel free to pm me and I can send you my number if you want to chat.
 

Scott Gissel

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Thank you very much! Sorry I should have said that I’m having misfires down that whole bank as well as the correlation codes. My tensioner on that bank collapsed. That was the root cause of this whole problem. I was hoping that since the engine only ran like that for a few seconds that the valves would be ok. But I’m leaning towards bent valves at this point. Prior to the tensioner failure the engine had no error codes at all. And I have confirmed that the plugs are in the correct spot. I don’t think the sensors would have both failed at once. I will be doing a leak down test tomorrow or the next day. Thank you all for your help so far. I’ll update as things progress.
 

jlglr4

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Doesn’t seem like bent valves would give you the cam position errors. If the sensors are good then the timing must still be off somehow. Doesn’t mean you don’t also have a bent valve, so maybe do the leakdown test to rule that out. But I’m guessing something is still off in the timing system. If you are confident the timing was all lined up properly, then maybe it’s the VVTs (or the solenoids that control the VVTs). What specific codes are you seeing?
 

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