2008 Wrangler Throttle Body Cleaning - Jeep Wrangler Forum

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Old 09-22-2010, 01:53 PM   #1
Join Date: Sep 2010
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Exclamation 2008 Wrangler Throttle Body Cleaning

Hey all, I'm having an issue with my 08 Rubicon Unlimited. I've researched it a bit and think I know what I need to do, the problem is doing it.

The engine is hesitating when I shift and accelerate. I changed the plugs but apparently others are having this issue and they say that you need to spray throttle body cleaner into it.

But I popped the hood and getting to the throttle body appears to be a fairly involved task. Anyone else done this? Any advice on getting there?

Thanks in advance,


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Old 09-22-2010, 02:03 PM   #2
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Getting to the throttle body involves removing the hose clamp on the intake pipe (rubber) and gently pulling it off. If you consider that "fairly involved," you should NOT be attempting to clean your TB yourself!

Next up, TB cleaning is NOT going to solve a hesitation issue. Garuanteed. Never heard of TB cleaner solving anything on anything but a gummed up, old hooptie, and I've been working professionally on cars for more than a decade. Not to mention NOTHING like that on a JK (see previous). Save your time, and investigate another path.

Is it still under warranty? Take it in to Chrysler. Is it an automatic? 6-speed?
Is your air filter new/clean? (And no, knocking dirt/crud out of an ancient filter does NOT make it clean!) Do you run name-brand gas? Is the Jeep modified in any way? Are you at high altitude? Towing?

Throwing parts and work at a problem rarely solves it. Diagnosing the problem correctly before you start is how a professional tackles a job. So should any DIYer, otherwise you cost yourself $$$, time, and headaches you could have EASILY avoided if you did your homework in advance. Hook it up to even a more basic, $200 scan tool/OBDII code reader from Autozone, and find out the conditions of your hesitation- is there a computer fault? Just because the CEL isn't lit doesn't mean you're not tripping a readiness code.

I'm NOT attacking you here, or anything, but this is a problem I run into as a professional all the time. Some guy reads about some wonder fix on the internet that's utter bollocks, and tries it himself, makes things worse, spends $1k in parts that make MY life harder by muddying up the problem with new ones, then brings me the aftermath. If he had only brought it in to the shop in the first place, paid me $50 for a quickie diag, he could have saved himself a lot of wasted Autozone trips

That's my story, and I'm sticking to it Mark W.

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Old 09-22-2010, 06:03 PM   #3
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Hi, thanks for the response on this. It's a 6 speed and not under warranty except it has a lifetime powertrain warranty. Is this something that would be covered under that?

I wouldn't jump on internet witchcraft like that except that I found multiple instances of guys using throttle body cleaner on this problem and, according to them, it worked immediately. It does sound too good to be true but there were multiple reports of it so I felt it might be valid.

Your advice is valued. Definitely don't feel attacked.


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Old 09-22-2010, 07:57 PM   #4
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A hesitation would almost certainly be covered under the powertrain warranty- bring 'er in!

Glad to hear you took it the right way- for some reason, some folks don't understand good ol' American internet sarcasm these days Let me know how it goes! Mark W.
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Old 09-23-2010, 07:05 AM   #5
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i'm a pretty big advocate to spraying out the TB...but a JK is a little too new still to have the TB carboned up. it's a good, cheap place to start on vehicles 100k miles or more, but JK's for the most part it does nothing as of right now.

odds are it's a sensor malfunction. i don't see too many JK's yet that have been tore up as far as engine issues go...or anything really. faulty sensors, bad fuel, and PCM malfunctions IMO are the primary engine culprits currently, until folks start screwing around with exhausts, intakes, and programmers.
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Old 09-23-2010, 07:08 AM   #6
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You said you changed the plugs, did you change the wires as well?

"I've got two things in this world, my balls and my word and I don't break them for no one."
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Old 09-23-2010, 11:16 PM   #7
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No, didn't change the wires. It only has 55,000 on it. Didn't figure they would be bad. I'll call the dealership to make sure this is covered and get it in if it is. Thanks!

(And you'd think Jeep people would have thicker skin, eh?)
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Old 09-17-2011, 01:16 AM   #8
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I cleaned my throttle body today. It took all of 15 minutes. I removed the intake tube, unplugged the throttle body lead, used an 8mm socket to remove the four throttle body bolts, then sprayed it out with cleaner. I also took the opportunity to swab out the intake while it was open. Reversal of the removal sequence and a successful start-up. 47K on an 09 X and the throttle body was pretty cruddy. Too easy.

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