My wife's car was taken in for a rough idle which ...

My wife's car was taken in for a rough idle which set a service engine soon light. I was told we needed a induction service cleaning and changing the plugs. The cost of the induction cleaning
service which is suppose to include cleaning the throttle body (which was dirty and wasn't done) according to the service writer and changing four plugs would cost around $480 with the diagnostic. I decided to replace the 4 plugs myself, which would save us $141, which is high for the 35 mins it took me to replace them. I cleaned the throttle body myself when replacing plugs, which replacing plugs had no effect on the problem or performance. The induction cleaning, or running a good injection cleaner thru the fuel rails was all it needed. My beef with Jim Butler service is they're over selling very costly services that are not required, being told certain services are include, which are not to raise sales. Beware