new to form i have a 93 blazer with 4.3w cpi the idel on it goes up and down from wanting to stall to 1000rpms in the last year it has had new injector unit with the supply lines and last week i replaced the air idel control valve ,cap,roter,wires and plugs not much better any sugestions and a side note it has push button 4x4 that works when it want which isnt to offen any help would be great thanks for looking

 

egr might need a good cleaning or replacement.

 

thanks i will try it what have you found the best to clean them with ?