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Unread 08-06-2007, 08:22 AM   #1
Grazsrootz
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Replacing a Throttle position sensor?

ok i have an 01 wj limited and since i bought it used i have a slight annoying but not fatal problem with the idle of the engine. the idle tends to be high (1100 rpm) and goes up and down sometimes. it will go as low as 500 rpm sometimes. and other times it will idle normal. some have told me its a vaccum line which i checked and replaced some of the cracking grommits. i dont think there was ever any leaks in the vaccum lines. which leads me to believe that the problem is being caused by the throttle position sensor. are these hard to replace. and how much am i looking to spend on the sensor it self at cheapest. Thanks alot fellas

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Unread 08-06-2007, 09:31 AM   #2
lma1973
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I just did one for the first time the other week and it was a piece of cake. Takes about 10 minutes.
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Unread 08-06-2007, 09:39 AM   #3
micifus
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what engine do you have? You may way too look into cleaning or replacing Your IAC first its
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Unread 08-06-2007, 10:19 AM   #4
Grazsrootz
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4.7. i just had the throttle body cleaned, new sparks put in, new iginition coil because a local shop insisted it just needed a new tune up
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Unread 08-06-2007, 11:26 AM   #5
alexo1us
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Quote:
Originally Posted by Grazsrootz
4.7. i just had the throttle body cleaned, new sparks put in, new iginition coil because a local shop insisted it just needed a new tune up
4.7 which coil did they replace? and why I suspect the cleaning did more then anything else.
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Unread 08-07-2007, 12:05 AM   #6
Grazsrootz
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Quote:
Originally Posted by alexo1us
4.7 which coil did they replace? and why I suspect the cleaning did more then anything else.
well i bought it at a toyota dealership and it came with a warranty so for free they replaced all of the spark plugs, throttle plate, all of the the ignition coils and cleaned the throttle body, the best they could do. i am getting no codes and it runs great except for the annoying idle. i am almost 100% positive it is the throttle position sensor because i lubed the cable and everything else has been done also i checked for a leak in the vaccum lines and i cannot find any, i even replaced all of the grommets. i just need to know how much a TPS usually costs and how to replace it, i hear it isnt hard but i am not an expert at auto repair, ive replaced o2 sensors before but is this alot harder? i mean i am mecanically compident but i need help! THANKS ALOT! ANYONE!
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Unread 08-07-2007, 12:29 AM   #7
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Definetly try replacing the TPS, i had the same problem on my 5.9 and replacing the TPS solved the problem right away. It only takes about five minutes, its really easy to do.
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Unread 08-07-2007, 01:17 AM   #8
alexo1us
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I was trying to put the page up. But way too big
PM me and I'll send you the page.
I'm still betting on the IAC had to clean mine once twice took it right out be careful with it but clean it up good be sure to spray in the hole to
But tps are relatively cheap auto parts store
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