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Old 08-23-2008, 10:22 AM
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HELP, backfire Problem

Need advice. I have a 350SBC and just removed the intake to put on a new duce intake. Decided I wanted to go back to my orig intake and Edelbrock 650 carb. Now, won't start, just backfire through the pipes. All my wires are connected right, triple checked. Put the HEI dist back in, close to the org position but now, even rotating as far as I can either way, more back fire. Can anyone adivse me on the problem? All vac lines plugged. Could my dist. be 180 Deg off?Thanks

Last edited by rac43; 08-23-2008 at 10:43 AM.
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Old 08-23-2008, 10:51 AM
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HELP, backfire Problem

don't sound like 180 off , more like 90 off .
your firing when exhaust valve is open .
rotate your wires clock wise one terminal .
or pull distributer up and turn it counter clockwise one to to notches .
if you get number one up on compression , how far is your rotor button past its terminal on cap .
your probably past and on next terminal for next plug .
in my tries at it , found that if your on number one top dead cylinder , rotor button should be straight ahead centered between the two terminals of 1 and 8
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Old 08-24-2008, 10:05 AM
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Thanks Burnt Olds. I have tried everything and this is what I end up with. I have taken the dizzy out at least 6 times yesterday. Took #1 plug out, put my finger over the hole and had my wife bump the starter till it blew my finger out, #1 at the TDC(or close). Turned the motor till it showed 12 deg advan. Looked up at my dist and the rotor was pointing between #6 and #8 plugs. The wires are not long enough going to the dist to rotate the dist around enough to get the rotor pointing at or near #1. Man, this is driving me nuts. I have changed intakes 5 times on the 350 and never a timing problem. All I did this time was replace intakes and now my timing is F-----. How can it get 80-90 degrees out just by taking it out and putting it back in?
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Old 08-24-2008, 10:19 AM
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HELP, backfire Problem

get that number one up dead on top dead center .
put distributer in and seated all the way with rotor straight forward center .
put number one wire on , should be the post to right of center between the two posts at front toward carburetor .
left of center is your number 8 post . then your 4 3 6 5 7 2
you'll get it .
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Old 08-24-2008, 11:57 AM
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Burnt Olds, that did it!!! Thanks so much for the great advise. I guess I'm old and tired and probably have forgot more than I know now. Got her up and running, NO timing problems now.
Bob
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