Hi.
I noticed when in drive and stopped at lights etc, as soon as I put my foot on the brake pedal, the idle revs bottom out, come back up to around 7-800rpm & my van isles crappy, vibrates so low in revs that's it's almost at stalling point.
Mechanic code tested it & nothing came up.
Installed brand new leads & NGK spark plugs yet it's still doing it.
Happens in reverse and drive only. No other gear & cruises along perfectly on straight roads and up hills.
I can't figure out what's wrong.
I've Already upped the idle revs via the idle screw and no difference.
Many ideas please??