what else could go wrong???
Grand Champion
Joined: Apr 2009
Posts: 5,293
Likes: 3
From: Kekaha, HI
Sean reset timing like we discussed, looks like the left bank was off off my around 30 degrees. That is enough to get piston/valve smack. I think he's pulling the head tomorrow. I just wish he was closer so I could help him out.
This does confirm one fear I did have. The 4.7L is supposed to be an interfernece motor, so a tooth out of time should keep it from starting. On Travis's, it didn't. A tooth off still allowed him to start it and didn't even throw a code. Sean is the 2nd person I've known to have a 4.7L 30 degrees out of time and still start. The other was an 2000 4.7L with JTEC PCM, now I see it's possible even for the newer NGC as well.
This does confirm one fear I did have. The 4.7L is supposed to be an interfernece motor, so a tooth out of time should keep it from starting. On Travis's, it didn't. A tooth off still allowed him to start it and didn't even throw a code. Sean is the 2nd person I've known to have a 4.7L 30 degrees out of time and still start. The other was an 2000 4.7L with JTEC PCM, now I see it's possible even for the newer NGC as well.
Last edited by Blown287; Apr 5, 2011 at 12:49 AM.
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not from a tooth I wouldnt think. your issue is probably more along the lines of bad plugs/gaps, TPS, or vacuum leak.
If you do a search in this section for "rough idle" (with the parenthesis) it should pull up a few threads that will point you in the right direction.
If you do a search in this section for "rough idle" (with the parenthesis) it should pull up a few threads that will point you in the right direction.
