High RPMs when cold and lack of power

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High RPMs when cold and lack of power

Unread post by RichieH » November 1st, 2015, 9:27 pm

Hi, I've got a 3.4 V6 Hilux that has started acting up recently.
From a cold start the engine revs at 1500rpm for 5-10 mins till it warms up and even then only drops back to 1100-1300. There is also a noticeable lack of power when driving up hill and the car decelerates rapidly soon as the accelerators is released (unusually quickly).

So far I tried changing the air and fuel filters, cleaning the mass air flow sensor and throttle body valve. Was going to change the plugs but they are seized tight - thanks previous owner!

Anyone experienced something similar?


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Joined: June 21st, 2008, 6:43 pm

Re: High RPMs when cold and lack of power

Unread post by skik » June 5th, 2016, 10:13 pm

i have a similar problem 91 3vze v6 4runner wont idle under 1500rpm hot or cold
the only thing i can trace it back to is the efi coolant temp sensor everything else is within spec according to factory service manual but the temp sensor reads way outside spec might be worth checking on yours

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