Hey guys I went to sell my truck and had it sold and all i needed was a smog (required here in CA) i took it in and it didnt pass. On idle it was a Gross Polluter, it didnt pass because of too high hydrocarbons. (unburnt fuel) I went here
and used the Lambda calculator and found that it was running a little lean and not getting a complete combustion.
Its a little rough at idle, which seems to be common for these engines with high mileage.
188000 miles right now.
So far i have done plugs, wires, oil change, sea foam, another oil change, cleaned MAF, cleaned Throttle body, Timing belt and water pump, coolant flush, and added a can of Restore in the the last oil change.
I would like to clean the IAC, but im not sure where it is.
Any other ideas on what to do that could help?
Thanks for your input