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What Is The Solenoid Between Throttle And Plenum?

YangLIU
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YangLIU Rising Star

YangLIU

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Posted (edited)

hi fellows,

i got randomly rough idle with grey/black smoke when idle in auto "D", nearly stall, maybe will stall later. driving is ok. when open bonnet, i found the plug is disconnect from solenoid between throttle and plenum. what's that for? does it cause the problem when idle?

thanks.

post-137368-0-52909200-1462669341_thumb.jpg

Edited by YangLIU
YangLIU Rising Star

YangLIU

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Posted (edited)

No idea, why would you leave it unplugged? At a guess it could, as the solenoid is likely open at idle.

ah...forgot to connect it back when do some mod.... ;););)

btw, i mean the power plug is disconnect, so i assume there is no air leak causing rough idle problem even though the solenoid does not have power.

Edited by YangLIU
YangLIU Rising Star

YangLIU

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  • Author
Posted (edited)

Looks like the aac to control ya auxiliary air control. Makes sense as I've heard it might give you a rough idle. Please confirm ppls

i re-connected the power plug for that aac, so far no rough idle. but there was only randomly rough idle before, so i can't make sure if rough idle really get sorted.

Edited by YangLIU
scotty nm35 Grand Master

scotty nm35

Posted
Posted

It's not aac, iac or any other idle valve, it is a purge solenoid for the fuel tank. As you are stuffing around with the amount of air getting into the plenum it may help anyway, but I wouldn't touch it.

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