Van runs fine except it started not wanting to idle. At first it was occasional. Now it's as soon as the engine idles down, it stalls. It will immediately restart and power braking keeping the RPM up a bit will allow driving. We suspected maybe tune up issues so the plugs were changed and plug wires. Others said maybe Idle Air Control but I am not seeing one listed for this engine/year. Anyone want to take a stab at best item to look at first? Thanks

 

Check for codes first.
Check air filter, fuel filter, etc.