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00 exp rough idle

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Old Mar 18, 2006 | 09:25 AM
  #1  
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00 exp rough idle

I washed my engine the other day and on the way home the engine light came on. It started running rough, and and has had a rough idle ever since. I took it to autozone and they read the code. It says "305 Cylinder 5misfire detected". I was looking to see if I had knocked anything loose and didn't see anything. What should I do? I don't know the firing order to be able to check cylinder 5. Anyhelp is appreciated. Thanks.

P.S. I talked with a mechanic friend of mine and he told me to never wash the engine. And that it sounded like the ignition coil was bad. I would rather fix this myself than pay his labor.
 
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Old Mar 18, 2006 | 09:46 AM
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#5 is the front plug on the lh side (drivers side). Pull off the coil and blow out the plug hole. You probably have water from washing down the plug hole.
 
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Old Mar 18, 2006 | 10:42 AM
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Not to sound like an idiot, but I have never jacked with this engine. From what I can tell, the plugs must be on top of this engine rather than the sides like older engines. If I am right about that, then maybe I am right when I assume the coil is bolted down? I see what I think are 8 coil packs that have a single bolt holding them down. These are under the fuel rails. Right??
 
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Old Mar 18, 2006 | 11:42 AM
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Most people who have these trucks only wash the engine once or go through a drive thru auto wash only once! The COP (one for each plug) hates water. Get them wet and you get a code. That is likely your problem. If you do a search on this forum you will find lots of info.
 
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Old Mar 18, 2006 | 04:57 PM
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Are we sure #5 is the front drivers side? That seems to easy. I figured it would be in the back. haha. I will try blowing it out tomorrow. Should I clean it with contact cleaner, or just blow it out?
 
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Old Mar 19, 2006 | 12:29 PM
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haynes manual sayes #5 front driver side. i've herd they are hell to get to though....good luck and keep us updated
 
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Old Mar 19, 2006 | 08:13 PM
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I took the cop out and blew out the hole where the plug is. I can't believe what all came out of there. I cleaned the cop with contact cleaner and then blew it out. Put everything back together and check engine light went off.

I seen another thread about a sticky gas pedal. Cleaned my throttle body and now thats good.

Thanks for all your help. It saved me $50 for that cop and no-telling how much on a mechanic.
 
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