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changed coil on number #5 cylinder and still says misfire

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  #1  
Old 02-16-2011, 06:33 PM
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Default changed coil on number #5 cylinder and still says misfire

changed all spark plugs out, and everything, don't know what else, hoping the piston isn't bad but thats what im thinking it is...... when i turn it on, it idles weird an shakes, i changed oil and everything....
 
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Old 02-16-2011, 09:13 PM
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What kind of plugs did you change too?
 
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Old 02-16-2011, 09:18 PM
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just stayed with the same ac delcos with .043 gaps as recommended...
 
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Old 02-16-2011, 10:26 PM
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Air Filter? Next steps would then be a compression check and if that's okay then check the associated fuel injector.

Do our trucks have an ignition control module or are the coils driven directly the powertrain control module?
 
  #5  
Old 02-16-2011, 10:48 PM
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i'm ordering a K&N cold air intake the 57 series this weekend, ill install it and see, hopefully thats all, its weird because for just about 24 to 36 hours the h3 was running perfect and everything, then jus went back to how it was... it was weird, i blew out the paper filter i have in there at the moment with a air hose because i'm going to get the K&N so soon, so mine as well deal with that one for a bit longer, hopefully thats all it is....

and another thing in when i start it up and put it into gear i step on the gas and it kinda like putters twice then catches then itll take off, sometimes it does it when i come to a stop too.. any clue what that could be?
 
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Old 02-17-2011, 05:51 AM
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My other truck threw a code, idled rough, and dipped in RPM's everytime I stopped. I was advised, from here, to add Techron fuel system cleaner. I do this mix once a month, no codes thrown, idle problems fixed. These things start running like an Evinrude tractor when the throttle body is dirty and/or a clogged injector.
 
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Old 02-17-2011, 12:50 PM
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Take it to the dealer mine was doing that misfire cyl. # 5 they replaced the head. 2007 auto 38,000 miles. They did it under warrenty, was in the shop for 4 days.
 
  #8  
Old 02-17-2011, 02:37 PM
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Originally Posted by tandrew
Take it to the dealer mine was doing that misfire cyl. # 5 they replaced the head. 2007 auto 38,000 miles. They did it under warrenty, was in the shop for 4 days.
His is an 06, unless it has under 50,000 miles, no warranty.
 
  #9  
Old 02-17-2011, 02:53 PM
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Default if it dont run rite,,

His is an 06, unless it has under 50,000 miles, no warranty
but,but, IF its the head, theres only one fix, mileage, warr or not. gotta face facts.
 
  #10  
Old 02-17-2011, 06:06 PM
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nope no warrenty, im at 65k which means if i have that problem(hoping really badly its NOT because then ill pull all my hair out) i'm S.O.L.
ill get a few things of that cleaner and put one in a month and see how that goes, its weird tho, i mean today driving to and back from work,(33miles one way) it was running like a champ, jus felt like it was hiccuping alil but not shaking to bad or anything, i jus put my order in for the K&N cold air intake and will arrive early next week so hopefully it breaths better too....
 


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