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Old 02-28-2008, 02:45 PM
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Default Replace the Throttle Body?

Hey guys... I'm new here as you can see. First, I did a search for my question and didn't really see what I was looking for. Most of the threads that I read were for cleaning the throttle body, not replacing. So I hope it's cool to post this question!

So heres the deal... On my way to work the other day, I noticed a few times on the freeway that when I hit the gas to accelerate, my Tacoma ('98, 4cyl, auto, 204k miles) had a slight hesitation where it almost lost speed and then it jumped up in acceleration. Curious, I gave the engine a lot of gas and then my check engine light came on. Stayed on for about 5 minutes and then it turned off and hasn't been on since. I took my truck into the dealership today to get the transmission flushed (it needed it before this issue) and asked them to see what problem could be. Just got a call back and they said that it could be one of two things. One, the throttle sensor could just need to be replaced ($240 parts/labor). Or two, the entire throttle body could need to be replaced ($1030 parts/labor). My question to you all is where exactly is the throttle body/sensor located? Is it hard to replace on my own? Or is tricky enough to where I should have the dealership do it. I'm by no means a mechanic in any way but if I could save myself some coin by doing it myself if it's easy enough, I just may give it a shot. What do you all think? Thanks for all your help... Oh, and this site rocks!
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Old 02-28-2008, 09:51 PM
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Default Re: Replace the Throttle Body?

The throttle body should last the life of the vehicle or at least 400,000 miles. So should the throttle position sensor.

Have the spark plugs been changed within the past 30000 miles using factory original plugs? Has the throttle plate ever been cleaned? Has the pre-catalytic converter oxygen sensor ever been replaced? These normal wear items need to be in order before you go looking at componets that should normally last the life of the vehicle.
Try another Phoenix dealer. They may give you an entirely different diagnosis.
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