Have a "92 Dodge Dyn. did the turn ignition key back/forth 3x. Last time left on, counted blinks
Have a '92 Dodge Dyn. did the turn ignition key back/forth 3x. Last time left on, counted the blinks of the checkeng. light. Got codes: 33,34,25 and 54. These all related to Speed control, ISC, AIS motor drive circuit shorted or open. Speed control vacum or vent solenoid circuit open/shorted???
You'll want to grab a Haynes manual or factory shop manual for this on Ebay. This will give you some troubleshooting steps to take to see what exactly the problem is. The vent solenoid may be bad, this is not uncommon. Check your vacuum lines to the ISC also, to see if any are cracked or disconnected.