Hey Folks, I need some serious tech help. I consider myself a fairly good shade tree mech, but I'm not doing so well on this one. It all started when my Cherry 67 coupe and I were crusing one evening. I was low on gas and I heard the car backfire and die. I coasted to a station and put some gas in it. I thought the backfire was odd but thought no more of it. After filling the tank it would not fire. I proceeded to work on it for several hours until finally having to tow it. I'm running a 289 with an edelbrock 600, petronix ignition, accel coil. I have replaced everything in the ignition system, including the dist, cap, button, wires, plugs,petronix etc. The car was running good when I started it. As soon as let it get to temp it was fouling out bad and missing. I put a timing light on the each wire and 4 cylinders have no spark from the cap. If the car runs even if it was out of time would'nt it still fire? I have replaced everything. A little help from my blue oval brothers(and sisters if applicable) would be great.
When coils go bad, they run good when cool, then break down when hot. Did you try a different coil? Dave
Yes, I boughtan accel about 2 weeks ago when I first had the problem. Today I returned it and bought a new one. Still runs like crap. Why would there be no fire from 4 of the contacts on the cap?
Someone else had a simular prob a while back...heres the link: http://mmb.maverick.to/showthread.php?t=16749&highlight=cylinders+spark Hope it helps...
Thanks. I read that post. That turned out to be a fuel problem. I 'm not getting spark at all from four of the posts on the cap. I was told this motor is a 289. I know the firing order on a 289 is 15426378. I noticed on that post he said his later model 5.0 had a different firing order. Does anyone have that? Maybe I'm using the wrong firing order. Just a thought .
wrong firing order just my , but even if your firing order was diff. you would still get a spark. I am not sure how the pertronix works, but it may be an optical pick-up. If that is the case you might need to clean the dist. cam that the points use. I think that is what the pertronix uses to get a signal off of. I would put a set of points and condenser back in and see if they work. At least then you know if its the pertronix. I would also pull each wire and visually check for a spark. Using a timing light isn't the most reliable. One question: which cylinders don't have fire? 15426378 13726548
i think the "pertronix" is magnetic. are the (4) that are missing on the same side or in a row?...frank...
try moving the plug wires around and seeing if the non fires move with them. the wires could be faulty from factory.
