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Frustrated with a 318


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Ok so here goes, I have a '78 power wagon with a mild 318 and I can not for the ...


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Old 09-23-2016, 01:57 AM   #1 (permalink)
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Default Frustrated with a 318
Ok so here goes, I have a '78 power wagon with a mild 318 and I can not for the life of me figure out my problem. A few weeks ago it was running fine but while driving it, it would randomly start popping through the carb (rebuilt 600 holley) and i kid you not, it sounded like a 2 stroke going down the road. The popping was annoying and it had no power. Well it started getting worse and worse and the other day I got stranded. Motor would turn on (still popping) but it would not rev and would die in gear instantly. Anyway, I just put $300 in a brand new 600 holley and it is doing the same thing so I dont think its a carb problem. I checked for vacuum leaks multiple times and I have none. Anyway, I moved onto timing and I tried advancing it and retarding and messed with it for a good hour and got no where, there were no noticeable difference no matter which way I turned the distributer. I have full msd ignition and its all brand new. I know even new items can be faulty but I truly believe there is nothing wrong with my ignition system but I dont know at this point. I'm so frustrated with it and am lost. I have no clue what to do next.


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Old 09-23-2016, 06:13 AM   #2 (permalink)
 
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I would drop back.... and punt!!

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Old 09-23-2016, 10:51 AM   #3 (permalink)
 
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how are the plugs? i would also double check the cap, rotor and wires. usually popping through the carb is timing, spark jumping wires or something seriously wrong in the engine. have you tried doing a compression check?


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Old 09-23-2016, 01:08 PM   #4 (permalink)
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rotating the dist. should produce definite changes in idle speed and idle quality. Pop the dist. cap off and examine it closely. Is there any moisture in the cap? Are there any carbon tracks in the inside between terminals? Do you have the correct rotor, and is the carbon center terminal in cap intact and making contact with rotor. Make sure the spark plug wires are connected properly, and in correct order. Make sure #1 dist terminal and rotor are indexed properly with TDC.
Maybe your timing chain is shot. Pull the fuel pump off and look in the hole with a bore scope. Look at the nylon teeth, make sure they are ALL intact.
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Old 09-29-2016, 05:43 AM   #5 (permalink)
 
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Originally Posted by Rustycowl69 View Post
rotating the dist. should produce definite changes in idle speed and idle quality. Pop the dist. cap off and examine it closely. Is there any moisture in the cap? Are there any carbon tracks in the inside between terminals? Do you have the correct rotor, and is the carbon center terminal in cap intact and making contact with rotor. Make sure the spark plug wires are connected properly, and in correct order. Make sure #1 dist terminal and rotor are indexed properly with TDC.
Maybe your timing chain is shot. Pull the fuel pump off and look in the hole with a bore scope. Look at the nylon teeth, make sure they are ALL intact.
Good Post I agree.


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Old 09-29-2016, 09:19 AM   #6 (permalink)
 
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Jokes. I penciled inside his cap.


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