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  #1  
Old 08-30-2012, 05:57 PM
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Just picked up my WK!!!

The wait is over! Just picked up my 2005 Laredo 4.7l V8 4x4 with 81k on it. I have one main concern though. When I drove it home it ran great on the highway but when I got into the city it occasionally had a rough idle when waiting at red lights. Spark plugs or something? Any ideas? Thanks





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Old 08-30-2012, 07:26 PM
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Re: Just picked up my WK!!!

Mine has always idled a bit rough, around 500rpm. It will occasionally dip below 500rpm and then come back up. I just got used to it, and I've read other threads about people noticing the same thing.
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Old 08-30-2012, 10:11 PM
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Re: Just picked up my WK!!!

Does it get worse in cold weather? I think I can live with it but I thought I was going to stall out today. I'm going to get some things checked on it soon. I will report back with any news. Thanks
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Old 09-01-2012, 10:10 AM
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Not that I've noticed. Maybe you could post a video of it at idle?


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Old 09-01-2012, 02:36 PM
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Re: Just picked up my WK!!!

Run some seafoam through the TB and gas tank. That should help with the rough idle.
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Old 09-01-2012, 09:38 PM
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Re: Just picked up my WK!!!

a "rough" idle is VERY common on the 4.7l... people have said using a superchips tuner and upping the idle 50 rpms or so helped... Unless you have a check engine lamp then dont worry about it falling apart tomorrow (check engine lamp indicating a misfire or something).

Sweet rig, I LOVED mine since the day we got it, When I got it for the price I did there was a possibility of selling it and making 10k, But I loved it too much and the value of having it as cheaply as we got it couldnt be beat and will likely remain in the fam until it dies.
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Old 09-01-2012, 10:40 PM
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Re: Just picked up my WK!!!

CONGRATS, Enjoy the ride.
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Old 09-02-2012, 01:46 AM
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Re: Just picked up my WK!!!

It doesn't idle rough very often at all so I'm not as worried now. A friend of mine suggested I clean the throttle body but here in a couple weeks I'm going to get a CAI and a Fastman's TB. I'm also getting spark plugs, wires, tires, and all the fluids serviced. Maybe when I tint my front windows it will go away
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Old 09-02-2012, 03:30 AM
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Re: Just picked up my WK!!!

get the airfilter element replaced as well
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Old 09-03-2012, 12:44 AM
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Re: Just picked up my WK!!!

See what happens after you get those services done. Other members have resolved a rough idle by replacing the EGR. I however do not have and never had a rough idle, nor does the idle dip or fluctuate at a stop light. I have a 06 4.7L v8, 84300 miles.
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Old 09-06-2012, 02:24 PM
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Re: Just picked up my WK!!!

I have an 06 with 91k and I have never had an issue with rough or dipping idle. I would change the spark plugs out with factory plugs, run some seafoam through it, and do an overall tune up. I never like to take the word of the dealer on when maintenance was done. So you will be better off just doing this all now... Good luck
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