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Old 01-04-2003, 05:23 PM
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Post chevy 350 problems

ok, i have a 69 camaro with a SBC 350, today i had to change the camshaft out in it, b/c it had a wiped lobe on it. I change it out, put it all back together fired it up and all i am getting now is that when i go to rev it up its like something is holding it down and poofs smoke out the carb and will die. I have done re-stabbed the dist. like 10 times and everytime i do its 180 degrees off. I bring #1 back up to TDC and re-stab and fire it up and does the same all over again, what could be the problem here? anything will help thanks

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Old 01-04-2003, 05:35 PM
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Sounds like you sheered the roll pin in the distributor gear.
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Old 01-05-2003, 01:35 AM
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When the teeth ingage on the distributer gear and the cam gear it will spin the rotor about 180 degrees. Take the cap off when you put the distibuter in and you will see it.
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Old 01-05-2003, 03:37 AM
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Do you have an intake valve to tight???Sounds like you could have an intake valve staying off its seat during the power stroke. They should be 1/2 turn past zero lash if its a hyd.
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Old 01-05-2003, 08:42 AM
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Think about what you just did. Cam change. Are you real sure the timing gears are dead on? Reset valves. Pull you dist again and check out the shear pin on the gear. Does the gear spin on the shaft?Reset to #1 install with cap off and watch that the rotor points to no#1 when inserted. Keep us informed.
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Old 01-05-2003, 08:57 AM
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ok, i checked the cam.. and its dead on, reset valves, pulled cap off dist. re-stabbed it put the rotor point to #1 with #1 at TDC, and still doing the same thing, i have no idea what to do now. Any other idea's anything would help, thanks
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Old 01-05-2003, 09:06 AM
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Maybe you have a couple of spark plug wires crossed.
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Old 01-05-2003, 09:23 AM
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thats what i thought too, i have checked it over and over just to make sure, and its right. B/c isnt the fireing order on a SBC 350 18436572 going clockwise, thats what i put it at. It idels great but dont rev. the engine up b/c its very very sluggish hardly gettting to 3,000 RPM's, i have no other options now lol. Thanks for the info guys. later
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Old 01-05-2003, 11:46 AM
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Try pulling the dist cap and turning the rotor by hand, try turning fairly hard (you'll have to simulate the resistance the oil pump puts on the gear). Turn it opposite the direction of normal rotation (counter clockwise), if it turns, you have a sheered roll pin. Roll pins will still LOOK like they are in place even when they are sheered sometimes.
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Old 01-05-2003, 04:15 PM
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ahh.... thanks, it does turn counterclockwise, i guess the roll pin sheered, i havent changed it yet but i got it running pretty good, it was the ignition wire, it wasnt getting good voltage to the distributor so that solved it little bit, but now it runs very strong up to 4,000 rpm's but after that its like something is holding it back a little bit nd not wanting to run very good. But all yall's information was helpfull thanks alot. CRK
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