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Cylinders 4 and 8 not firing

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Old Apr 3, 2011 | 08:29 PM
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Default Cylinders 4 and 8 not firing

Hey guys, New to the forum. I have a 94 ram,1500 with the 5.2.
cylanders 4 and 8 dont seem to be firing, i can pull both wires off and the engine runs the same even though both plugs are firing. changed the injectors today and it didnt change anything so this is leading me to believe that the cam sensor is the culpret. im not getting any check engine codes, anyone have any ideas?
 
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Old Apr 3, 2011 | 09:07 PM
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Could also be cap/rotor problem, If the leads for those cylinders are burnt out/corroded in the dist cap, it stands to reason that it wouldn't fire them.
 
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Old Apr 3, 2011 | 09:28 PM
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Originally Posted by Mad_Scientist
Could also be cap/rotor problem, If the leads for those cylinders are burnt out/corroded in the dist cap, it stands to reason that it wouldn't fire them.

He said the plugs are firing.
 
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Old Apr 3, 2011 | 09:40 PM
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Originally Posted by ghost4321
He said the plugs are firing.
Sorry, reading comprehension isn't my strong suit today lol.

Compression on the cylinders in question?
 
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Old Apr 3, 2011 | 10:26 PM
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I'm more curious to know the reason the OP randomly pulled these wires to find this problem. lol
 
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Old Apr 3, 2011 | 10:31 PM
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Originally Posted by zman17
I'm more curious to know the reason the OP randomly pulled these wires to find this problem. lol

That's the old school way of finding a miss. Gotta be careful not to get zapped tough, hurts like a mother.
 
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Old Apr 4, 2011 | 01:27 AM
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Originally Posted by zman17
I'm more curious to know the reason the OP randomly pulled these wires to find this problem. lol
First i put a few drops of water on the exhaust manifold to figure out which cylanders werent lighting up (now thats old school) lol, i pulled the wires to make sure i was right, which i was..... ive learned fast you have to get crafty with these dodges.
if it was the cam sensor would it be possible that it would only affect the 2 cylanders? or would it not want run all together?
 
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Old Apr 4, 2011 | 03:40 AM
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Originally Posted by YJMike
First i put a few drops of water on the exhaust manifold to figure out which cylanders werent lighting up (now thats old school) lol, i pulled the wires to make sure i was right, which i was..... ive learned fast you have to get crafty with these dodges.
if it was the cam sensor would it be possible that it would only affect the 2 cylanders? or would it not want run all together?
Im willing to venture that if the cam sensor was out, it would affect all cylinders (intermittent miss everywhere or it wouldn't start at all).
 
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Old Apr 4, 2011 | 07:28 AM
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Maybe time for a compression check.
 
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Old Apr 4, 2011 | 10:24 AM
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Are the injectors firing? I know you swapped 'em around, but, if the PCM doesn't fire them, for whatever reason...... swapping them around won't help.
 
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