2003 4.6 Plug and coil change (pics)

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Old Jan 8, 2012 | 06:20 PM
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2003 4.6 Plug and coil change (pics)

Had a misfire that got worse and worse, and i knew the previous owner had installed bosch quad platinums. Finally got the truck back from my parents to i ordered the parts and went to town. Took a little longer then 2 hours, with me stopping and taking a lot of pictures along the way

Plugs and coils NIB. I choose Factory plugs and Global coils


Intake tube, PCV hoses, EVAP, PS bracket and harness removed and relocated for access


Passenger side harness relocated as well as heater hose.


7mm swivel socket used to remove bolts from coils


coils removed (driver side shown)


Be on the look out for sealing rings from the coil and injector connectors. The need to get pushed back into the connector (coils bolts shown as well)


Long spark plug socket, and extensions. Flex head 3/8ths ratchet also helps out


Used a stubby 3/8 flex to do majority of the plug turning, not necessary but it makes it go faster


old coils (OEM)


Gross looking boots and springs


New plugs in, torqued to 28ftlbs


New coils and a giant tube of dielectric grease


I always recommend lining up the old plugs and comparing them to see if you have a problem cylinder like oil burning, missfire, or coolant leak. The plug will be discolored if its got something wrong


And finally reading and clearing my misfire light out with my hand held scanner
 

Last edited by Patman; Jan 9, 2012 at 04:40 PM.
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Old Jan 9, 2012 | 12:55 PM
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Nice write-up, Pat! Thanks!!!
 
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Old Jan 9, 2012 | 01:14 PM
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From: In the fast lane from LA to Tokyo...
Nice write up...

Don't the cop retainer bolts usually have a 7mm bolt head?.....
 
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Old Jan 9, 2012 | 04:39 PM
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Originally Posted by 88racing
Don't the cop retainer bolts usually have a 7mm bolt head?.....
yes you are correct, all the LR stuff uses 8mm so i just wrote that out of habit.
 
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Old Jan 9, 2012 | 08:53 PM
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Nice job. I can't wait to buy a house. Sucks trying to work on my truck in the apartment parking lot.
 
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Old Jan 10, 2012 | 06:31 AM
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Looks like all but one of the plugs is a bosch. Was the single electrode plug in the number four cylinder?
 
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Old Jan 10, 2012 | 10:34 AM
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No the single electrode was put in #1 after the truck spit out a spark plug. 8 thread heads and i guess it worked itself loose. It happened to my parents when they were out of town, so they just took it to a shop had a new coil and plug put in.

You can see my fan drawing on the box that the spark plugs are in, indicating which plug came from where
 
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Old Jan 12, 2012 | 08:53 PM
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From: Chandler, Tx
Kewl, would have never identified that as a fan..
 
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Old Jan 12, 2012 | 10:05 PM
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there's also an arrow that you can almost make out between the two rows of plugs, closer to the drivers side
 
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