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Old 02-19-2013, 10:35 PM
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What to get done in a tune up?

Hey there,

I want to get a tune up done on my 2006 Grand Cherokee Jeep Laredo 4.7 4wd it has 125,000 miles on it, I have some questions:

1). I last changed the sparkplugs and air filter 1 and a half years ago, I've done around 15k miles since than, the mechanics did not add the standard recommended champion sparkplugs but rather Bosch or ngk I think...Should I change those as well?

2). What else should I get changed/done during the tune up?

Thx.

Ps: In the last 6 months I've flushed the engine coolant, changed the transmission oil, differential fluids, transfer case fluid, changed the PVC valve, cleaned the throttle body and IAC valve.




Thank you!
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Old 02-19-2013, 11:45 PM
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I would change the plugs to the stock copper champions, also add a bottle of fuel injector cleaner to the tank, seafoam is what I do, also clean the throttle body and the iac valve, change out the diff fluids and t case as well as tranny, you can also check or replace your serpentine belt.
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Old 02-20-2013, 06:15 AM
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Re: What to get done in a tune up?

Quote:
Originally Posted by hummer recovery team View Post
I would change the plugs to the stock copper champions, also add a bottle of fuel injector cleaner to the tank, seafoam is what I do, also clean the throttle body and the iac valve, change out the diff fluids and t case as well as tranny, you can also check or replace your serpentine belt.
I edited my original post concerning fluid changes etc. Roger on the stock copper champions and Seafoam. Will any air filter do? Anything else need to be done? The mechanic keeps telling me the serpentine belt is good.
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Old 02-20-2013, 08:18 AM
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K&n filter is a great filter and just needs to be cleaned never replaced..

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Old 02-20-2013, 11:54 AM
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I totally agree
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Old 02-20-2013, 08:42 PM
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Re: What to get done in a tune up?

By the way, how many spark plugs is there in a 2006 WK 4.7 V8 Jeep Grand Cherokee? 16?

Do you guys change the 8 Ignition Coils as well?
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Old 02-20-2013, 09:20 PM
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Only 8 plugs I wouldn't worry about the coils they rarely go bad
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Old 02-20-2013, 09:21 PM
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Re: What to get done in a tune up?

I'd consider swapping out the O2 sensors, but only if your MPG is less than you're expecting.

Also if your serpentine belt is original, get a new one. I swap the tensioner and idler at the same time because they are relatively cheap.
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Old 02-20-2013, 10:44 PM
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Re: What to get done in a tune up?

Quote:
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Only 8 plugs I wouldn't worry about the coils they rarely go bad
8 Plugs? Are you sure? I think we have 16?? 8 on top 8 on the bottom?
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Old 02-20-2013, 10:47 PM
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Re: What to get done in a tune up?

Quote:
Originally Posted by Yadkin View Post
I'd consider swapping out the O2 sensors, but only if your MPG is less than you're expecting.

Also if your serpentine belt is original, get a new one. I swap the tensioner and idler at the same time because they are relatively cheap.
How many O2 Sensors does a 2006 4.7 WK have? And how long do you think the labor would be for that.

Also, do you know how long the labor would be to change the spark plugs, and belt/pulley/tensioner. Thanks!
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Old 02-20-2013, 10:58 PM
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On the 08 and up 4.7 engines they have 16 plugs you have 06 so only 8, 4o2 sensors
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Old 02-21-2013, 09:33 AM
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Re: What to get done in a tune up?

I don't have your vehicle so I don't know how long it would take to do plugs and sensors. With those, it's all about access. And with sensors, they tend to seize in there because of the huge temperature differentials they go through. best to hit them with penetrating oil at least a day in advance of removal.

Replacing the idler and tensioner can be done in about 5-10 minutes, but again, access is everything.
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