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Old April 16th, 2010, 01:26 AM   #1
teichman
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Default chevy 350 with no power

I have a 1984 blazer with a 350 holley 600 carb and HEI distributor my problem is that it will not run right starts up and idles fine I can dive it out of the garage fine get down the road a little and it stalls then it will only start and idle. once I hit the throttle i stall even in neutral.

The carb, cap, rotor, wires, plugs, and ignition control mod are new
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Old April 16th, 2010, 01:53 AM   #2
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i would check the timing. do the exhaust manifolds get red hot when you have this problem?
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Old April 16th, 2010, 02:05 AM   #3
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timming is good and the exhaust dose not get red hot
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Old April 16th, 2010, 02:05 AM   #4
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timming is good and the exhaust dose not get red hot
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Old April 16th, 2010, 02:32 AM   #5
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Sounds like a fuel supply issue to me, check your float level, fuel filter, fuel pressure, ect. I had a Mustang that did the same exact thing, where the fuel line screwed into the carb there was a screen (Like a kitchen faucet screen) inline that was full of crap, cleaned it out and it ran like a champ. What kind of fuel pump do you have mechanical or electric? If mechanical get a new one, they are cheap, if electric where is it mounted? Needs to be by the tank as they push fuel not pull fuel.
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Old April 16th, 2010, 05:44 AM   #6
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x2 on low fuel volume...sounds like a carb issue..if you can, either bolt that carb on a known good running engine, or bolt a known good carb on this engine, and see what happens then...if the problem follows the carb, or goes away with a different carb, you know where the problem lies
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Old April 16th, 2010, 07:24 PM   #7
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im gonna have to go with the fuel supply issue. im betting you either have a plugged filter or a bad pump.

if its a mechanical pump theres a little trick to holding the pushrod that runs the pump in place when you replace it.
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Old April 16th, 2010, 08:10 PM   #8
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Quote:
Originally Posted by jmw55018 View Post
im gonna have to go with the fuel supply issue. im betting you either have a plugged filter or a bad pump.

if its a mechanical pump theres a little trick to holding the pushrod that runs the pump in place when you replace it.
I was thinking the exact thing. my `77 had so much crap in the tank it was plugging filters about the rate of one a week. I upgraded to a huge can style and cured the problem.
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Old April 16th, 2010, 08:11 PM   #9
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oh yeah don't forget to check the lines to see your not sucking air. it could be a rusty line or pick tube rotted out
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