Originally Posted by khackr
sounds like you may know some of the Modular stuff? I have the valve cover off on drivers side, oil filler off on passangers side to see inside-crank at TDC, drivers side is a bit to the rt, say 1:00 instead of 12:00. if i bring the crank back to 10 btc it is straight up and down. is this a possibility it is off a tooth? i havent pulled the pass vc due to ac restrictions yet, but is the an accurate way to check this? getting a p0340 and all wiring and PCM tests good, runs bad and dies with cmp plugged in. is there enough clearence in the valve to piston ratio to not cause damage if this is off?
Yes, these engines will run if it's off by a tooth and a half. And that's all it takes to set a hard P0340. I would be looking at the timing chain guides as well. For what it's worth, I don't even bother with the Ford/Rotunda cam timing tools on any of these engines, be it a 2-valve, 3-valve or 4-valve engine. And so far, I haven't had any issue with timing these engines. All you need to do, is fold the chain exactly in HALF. The end with the two copper links (or two fabricated paint marks if the copper links are not visible) are lined up with the cam reference mark, and the single copper link is lined up with the mark on the crank sprocket, with the mark oriented at the 6 o'clock position. You then install the hydraulic timing chain tensioner, and repeat the process for the passenger side timing chain. DO NOT FORGET TO INSTALL THE CRANK SENSOR RING BEFORE YOU RE-INSTALL THE FRONT COVER.
And THAT, pretty much sums up the timing procedure on any 4.6/5.4/6.8L engine.