V8 Throttle Body Cleaning

M

mjotrainbrain

New member
So I'm trying to clean my throttle body on my 2003 V8 (about to turn over 180k miles) for what is probably the first time in its life. Did MAF earlier. Battery is unplugged right now so the ECU can reset. I was about to pull the 2 nuts and 2 bolts holding the TB to the intake when I noticed it has 3 or 4 hoses connected to it (as well as 1 plug). Can I just pull these off to remove the TB? None of them contain any fluids do they? Just want to make sure I'm not going to mess up my nicely running 4Runner!
 
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It looks like at least one is coolant, and another returns back to the TB on the bottom, so that answers a fair bit of it. I think the last one is vacuum. If I let it completely cool down should it be OK to disconnect the coolant one, or will it leak/ get an air bubble in the system?
 
Update: got it done, wasn't actually all that dirty. When I reconnected the battery it didn't idle high like everybody says it should, so that's odd. The auto driver's and rear window didn't work so I had to reset those, but now everything is working exactly as it should. The throttle might be a little more responsive, but I think I'm just imagining it.
 
mjotrainbrain said:
Update: got it done, wasn't actually all that dirty. When I reconnected the battery it didn't idle high like everybody says it should, so that's odd. The auto driver's and rear window didn't work so I had to reset those, but now everything is working exactly as it should. The throttle might be a little more responsive, but I think I'm just imagining it.
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Throw in some seafoam and you will feel like you are driving a new car! :pound:
 
I don't take mine off when I do it. Just use rags, toothbrush and a small handled tool to keep the throttle plate open.
 
ZiaMan said:
I don't take mine off when I do it. Just use rags, toothbrush and a small handled tool to keep the throttle plate open.
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I thought about that, but I like taking stuff apart. And I had CRC TB spray that I got for free that I wanted to try, wasn't comfortable just spraying that into the intake.
 
mjotrainbrain said:
I've heard mixed reviews on that product. Personally I'd rather err on the side of safety!
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Agreed, I'd rather put seafoam in a Ford because it's headed to the scrap yard anyway. Dear Ford I hate you kthxbye!

I also left mine attached and used carb cleaner and a rag. Didn't notice any difference after.

I don't think I got a high idle, but I didn't disconnect the battery when I did it. It's a brand new battery though, so the computer definitely got reset recently.

My mpg jumped back to 18 hwy after I did it, although the speed limits here are more like 50 vs 80... 30mph = 5mpg I guess.

Sent from my XT1710-02 using Tapatalk
 
mannydantyla said:
I don't know anything about these engines, and I'm not a professional mechanic or anything, but I've never heard of that. Is the coolant there to cool/warm-up the throttle body?? That could be a reason for it but that seems... extreme.
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So the throttle plate does not get frozen stuck or closed in cold weather. Lots of vehicles have this.
 
ZiaMan said:
So the throttle plate does not get frozen stuck or closed in cold weather. Lots of vehicles have this.
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Neat! My old 83 Chevy sure didn't have that feature, and sometimes the throttle plates on the carburetor would stick. Drove me crazy! Very hard to smoothly accelerate the truck without a sudden and unwanted burst of forward acceleration, like a blundering idiot.
 
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