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My bronco has a 351m. it will not start unl...




By aaronrobertc on Jun 15, 2009

" "
My bronco has a 351m. it will not start unless i advance the timing alot. after i get it running i only have spark to #2,4,6,and 8 cylinders. I Have replaced the coil, condenser, wires, modual, cap, rotor. I used a jumper wire to 12v run on the ignition modual. All of the changes and parts havnt changed anything. To check the timing I brought #1 piston up to TDC on the compresion stroke and all was ok. None of the friends mechanics or parts houses have had any idea what is going on. Please help!
Comments:

Jun 15, 2009

- I have the firing order 13726548. i just built the motor 3 months ago and it ran great till now i am picking up a distributor today hope it works. thanks,

Jun 21, 2009

- Wanted to let you know the problem was the coil. It was only 3 months old. First time ive herd of this.

Best Solution

posted on Jun 15, 2009
Helpful)

csmock132

Rank: Guru 
Rating: 89%, 1329 votes
What firing order are you using. It should be 13726548. If you still have no spark on 1-3-5-7 then I would say the distributor is junk. As for the timing, I wouldn't worry about that yet until you get it running on all 8. But it might have a jumped timing chain.
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