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there are no codes comming up on the dash. no check engine light comming up
the van has 145,000km on it (87,000 ) miles.
other then the rough idle it runs great. starts fine runs great at hi idle,no smoke.
just idles rough when it comes off hi idle. like it is idleing to low with a slight shake.
it smooths out in drive with slight presure on the gas.
the rpm gauge is not working (tack) and yes i think it is idling a little to low.
If it is idling too low and has no codes, I can suggest to replace the idle air control valve. But this will only be a suggestion. I cannot say it will fix your car, simply because I have no trouble codes to back up that suggestion. Here is a picture of the valve I am refering to. It is located on the intake manifold near the throttle body. Thanks