Car Bogging Down With Initial Start Up

[MZTRBO]

Hi Guys,

Got a little problem...My car when cold does not idle high until the accelerator is touched, then it revs fine to 1400/1500rpm..

Why is it bogging down when cold?

Cheers

Daniel

[dyefuker]

i have this exact same problem with my r33, only ever on cold starts, and only like 20% of the time, other cold starts it will be fine, but yea sometimes i start it and it trys to stall, revs drop to like 500, then when i touch the throttle it revs up and idles fine, weird problem

[_Ryan_]

same, its either cold start valve or IAC valve i think.... one of these days i will clean them(or pay someone else too )

[MZTRBO]

yeah I was thinking it would be that, might give it a go a clean it out.

Cheers

[Ultimategtr]

Cold start valve or Water temp sensor.

[dyefuker]

silly question lol, what the f*** is a cold start valve lol didnt even know that existed, where is it? and how to clean?

[Joe_89]

Yea ive got that problem on my r33 too, only started recently. i wouldnt know where this cold start valve is either, id appreciate a diagram or some instruction of where it is and how to get it out ect

[Joe_89]

Ok just did a pretty extensive search on the subject and supposedly you cant clean the acctual cold start valve because its a bi-metal stip valve but the AAC valve can be cleaned and theres a DIY tutorial for that here: http://www.skylinesaustralia.com/forums/Di...mp;hl=aac+valve

But im going with the idea that the cold start valve is faulty and not opening properly/atall and therefore causing a difficult start.

Mine is only minor and is just an annoyance rather than a problem so im thinking there may be just a hesitation in the valve opening.

Anyway, ill give it a look tomorrow and let you know how i get on

[08r3308]

Cold start valve or Water temp sensor.

where is water temp sensor?

how do you test if its gone?

they only available at Nissan?