My 2001 Sport Trac had major engine repairs two months ago, during which all the timing chains, valve springs and valve lifters were replaced. It has run well since then (at least 1000 miles or more).
Now the vehicle is running rough and near-stalling, especially at low speeds. The check engine light is on with codes P0340 and P1309 (pending).
Is it likely that the new problems are related to the recent repairs?
Added (1). The original shop is in a different state, so there's no possibility of taking it back.
I'm not really concerned with assigning blame to the original mechanic; just ensuring that the work that he performed won't have to be redone. If the problem is most likely the camshaft position sensor or wiring, I can deal with it. However, if a timing chain failure is causing the problem, that's a bigger issue. So the real question is, could the new problems be caused by a timing chain malfunction?
Read more: Ford Explorer Sport Trac, P0340 P1309 after recent engine repairs?
