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Jump started backwards, now it's missing?

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Old Feb 28, 2010 | 03:12 PM
  #1  
lemonshindig's Avatar
lemonshindig
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Laughing Gas
Joined: Feb 2010
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From: Port Orchard, WA
Jump started backwards, now it's missing?

Got a jump at the local auto store. My color cables are wrong and he moved the jumper cables from one battery to the other and put them on backwards. Sparks were flying but the truck did start and run. But now there's a thumping sound. It's most noticeable through the intake, you don't hear anything at the exhaust end.

Thanks
-Matt
 
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Old Feb 28, 2010 | 03:24 PM
  #2  
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starmilt
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From: Faibanks Ak.
Two different problems completely unrelated. Sounds like a valve problem, is your oil level correct.
 
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Old Feb 28, 2010 | 03:39 PM
  #3  
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WarOzz
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From: Dairy, OR
Unrelated problems unless a bearing going out in the alternator is what caused the batteries to go dead and now they are actually clunking. If it's a sound coming out of the intake tho star is right, check valves & lifters.
 
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Old Mar 1, 2010 | 06:57 AM
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mistakenID
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From: West Valley Utah
The only thing electrical for the engine to run is the shut off solenoid. It's either open or closed, nothing that would cause a miss or thumping noise.
 
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