looking at replacing the injectors on my 06,non turbo,s40.does the color coding of injectors make any difference?would the injectors for a turbo engine run richer or leaner?.would appreciate any input.

 

No Turbo engines require higher flow rate , replace with same

 

i am experiencing some engine problems that might be lean conditions.not sure that current injectors are correct,would like to go one step richer.current injectors are brown.suggestions?

 

In theory it does not matter what you use for injectors.

If the O2 sensor thinks it's too rich, the ECU will fire the injectors a shorter period of time. And conversely if the O2 sensor thinks it's too lean - the injectors will stay open longer. Too rich or lean long enough and codes will be set. I trust you have scanned for codes.

If you think it's lean - you should be looking at your fuel trims first - That will tell you what the O2 sensor is thinking. Then make an informed decision (rather than randomly replacing parts on a guess because you "think" it's lean)

Sure it's possible that it's lean due to low fuel pressure or any other number of reasons - but codes will usually appear.

 

re hoonk,you are absolutely correct in what you say.but i am working in my driveway with limited tools and less money.i am getting a check engine light.saying #1 cyl is too lean,also get light #3 misfire if revved over 3200 rpm,although the engine feels to run fine in either case. did check for air leaks and found none.

 

A common problem is the fuel pressure regulator , if you put your foot down and it hesitates than its normally the problem , but check codes first