Not Ranked
Msinghof,
Did you ever find out what the problem was? I fired up my 428 for the first time last night. Other than a few water leaks and that sort of thing, everything was going well until my buddy noticed that the header pipe on cylinder number 7 appeared to be glowing hot. That was after about 15 minutes of running at 1500-2200 rpm and only header number 7 seemed to be having the problem. I shut down and pulled all the plugs and they all looked good (although number 5 was a bit darker brown than all the others). Now I need to decide a course of action. Here's what I plan:
1. Verify that my timing marks are correct by finding TDC using a spark plug hole piston stop device. I figured I better do this since I did put a different vibration dampner on the car that is larger in diameter than the original which caused me to have to move the pointer a bit. I thought I had this all set up right but I better double check.
2. To get the car to fire up and run, I had to advance the timing quite a bit more than I would have expected. I had to set it at about 20 degrees initial. Anything less than that and it didn't want to run smoothly or idle. I'm using an MSD billet distributor and I haven't monkeyed with the total advance yet. Whatever springs came with it initially are what are still in it.
3. The firing order of a 428 has cylinders 7 and 8 firing one after the other. Maybe I'm inducing a spark at the wrong time between the two plug wires since the wires are routed close together. I suppose that could cause one of they cylinders to fire way to soon or way too late. I'm going to separate the wires to eliminate the possibility.
4. I plan on double checking that I have the rocker arms adjusted properly and that an exhaust valve isn't staying partially open or something.
I'd appeciate comments or other suggestions that anyone might have.
Chris
|