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Old April 17th, 2006, 10:35 PM   #1
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Default Chevy 350 wont start need help

Is there anyone in Kalamazoo who would be willing to help me get my chevy 350 engine started?
I just dropped it in last weekend. Some friends and I tried to start it. It will fire but it wont start. I dont know if the timing is off or what, it does have a pretty new carb as well.
It is a 68 Chevy 350 block, with heads from an 84 corvette, an edelbrock alum. intake, holly carb, and an HEI supercoil.
Unfortunately I dont know what I am doing when it comes to this engine stuff.
Even if someone could just provide some advice it would be greatly appreciated.
Thank you very much,
Erik
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Old April 18th, 2006, 04:57 PM   #2
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make sure the wires are connected in the right firing order. 18436572 u can set an hei to use whatever pin u want as #1, but usually its the 1st or 2nd one in after the connector block. find top dead center on the motor (not sure if u know what i mean) and see where the rotor is in the dist. cap.
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Old April 18th, 2006, 09:57 PM   #3
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we have done that and it still wont start.
Thats kind of where we are stuck
Any other suggestions
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Old April 18th, 2006, 10:36 PM   #4
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Move all the plug wires 180 degrees and try that.
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Old April 19th, 2006, 08:31 AM   #5
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are you actually getting fuel to the carb? Floats stuck maybe? I know you said it fires, is that on fuel, or you spraying starting fluid in?
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Old April 19th, 2006, 11:00 AM   #6
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Yes it is getting fuel.
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Old April 20th, 2006, 03:16 PM   #7
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so u have spark and u have fuel.... its either something with timing, possibly a bad plug wire, maybe a bad plug or 2, or something in the carb is just not right. when u press the gas is the acc. pump pushing fuel into the carb? also how much fuel pressure is going to the carb?
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Old April 20th, 2006, 06:45 PM   #8
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I have to ask, does it spin really fast while cranking? if so you may have over tightened the rockers and now the valves are all stuck open just a little. if you can do a compression test and it had better be over 150psi on each cylinder. the worst it can be and even think about running is about 90 psi.
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Old April 20th, 2006, 07:05 PM   #9
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HAHAHA...forgot about that Yetti....even though I have seen guys do that many many times.

I had 85-90 psi on my 4.0 when I pulled it to do the stroker. It would only start on warm days and in the morning I had to shoot starting fluid in it to get it to fire. Once it warmed up it was ok though.
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Old April 20th, 2006, 08:21 PM   #10
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you have seen this Tim? I lost count of the basket cases drug into my dealer by good mechanics that missed this. I have seen some real gems over the years.
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Old April 20th, 2006, 08:28 PM   #11
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I know it...I don't build a ton of chevy motors so it sorta slipped my mind but yea, have seen it bunches in the past. I have even over adjusted mine in my 383 and had it run crappy once it warmed up and everything expanded.

I can now remember one I saw that the rockers were like screwed all the way down...I asked the guy about it and he said his manual said to tighten them to 21 foot pounds.....I was like...no, I think you read that wrong...turned out it was inch pounds and it was the spec for the rocker COVER bolts. :tonka:
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Old April 20th, 2006, 08:58 PM   #12
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its funny how much crap we have run into over the years. did you ever run into a 2.5 chevy engine that wouldn't start after doing a head gasket? the darn lifters would gum up with coolant and wouldn't leak down and the rockers were preset heights, so you just tightened them down. I used to drain the oil and crank it till the lifters collapsed.
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