2000 kia sportage trouble code po171 once in awhile,runs lean when cold,ok warm. i have 2 of these cars, changed over , map, tps ,idle sensors. also changed fuel injectors, filters ,fuel pump,fuel pressure reg. checked hoses also plugs & wires. any thoughs?helpless in vermont.

I have 2005 Kia Sportage with a check engine light. No other symptoms. I was told by Kia and Local mechanic that it is the fuel injectors. Error Code states that Fuel injectors are running lean. Put Master airflow- no change. Ran engine test with propane to run rich and trim never changed from 15. Car runs great. Kia dealer said that this is because we use Ethel in gas that it effects the alumium fuel rail delivery to the injectors and that it is necessary to change all of them .Kia Dealer wants $1,000.00 deposit to place order 6 fuel injectors from Kia. (Has anyone heard of that?)Also put fuel injector cleaner in tank.Does anyone have any suggestions before I spend over $1,000.00 to replace all 6 injectors or possible idea of what could be wrong?

Sounds like a possible vacuum leak, which may be present only when cold due to expansion of parts as the engine warms up. Use starting fluid to spray around vacuum lines and intake gaskets, as well as around intake mounted sensors while the engine is cold and running. If engine speed increases at any time, you have found the leak. Re test to confirm then repair the leak. Also test the IAC (idle air control) for propper operation. It is on top of and in the center of the engine compartment, mounted on the intake tube.