Won't start
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New User
Joined: Nov 2003
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From: taos
Won't start
I swapped a 79 mid sized car 302 in place of the tired 351 m in my 78 f 150 4x4. It wont start and back fires through the carb. I am thinking maybe the 351 truck ignition module is not compatible with the 302 car distributor or maybe the 15426378 counter clockwise firing order from my Chilton manual is wrong for this motor. Before I start hunting for ignition or cam timing problems I thought I'd ask for help on this forum and that there might be something simple I'm missing.
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New User
Joined: Nov 2003
Posts: 18
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From: taos
Thanks guys,
It is a junkyard motor ( when will I learn) they said it ran when they parked it and the distributor did not look like it had been disturbed so I thought it must be something I've done . I'll set the dist. on #1 TDC and see what hahappens.
It is a junkyard motor ( when will I learn) they said it ran when they parked it and the distributor did not look like it had been disturbed so I thought it must be something I've done . I'll set the dist. on #1 TDC and see what hahappens.
Laughing Gas
Joined: Jan 2004
Posts: 913
Likes: 2
From: Pensacola, FL
firing order is definitely right, i have those numbers glued to my memory from my 77 which had a 302, but i wonder if the distributor didnt look moved, maybe the timing chain is stretched and has jumped a tooth? just a thought.
Junior User
Joined: Jul 2003
Posts: 54
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If you guys figure this out let me know. I have the same problem right now, the backfire through the carburator is actually just gas, no fire in mine. The distributor was messed with, but is is at the number one with tdc. ???????spark is good on all plugs.
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New User
Joined: Nov 2003
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From: taos
As it turns out the distributor had been out of my motor and when it was put back in it was put back in 180 degrees out of phase so yes it was firing on the #1 cylinder but on the exhaust stroke. Set yours up to fire on the intake stroke # 1 tdc ( both valves closed and it should solve your problem.
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