Originally posted by Paul Kienitz:
It's been said in the Zetec forum that sometimes you need to have a garage professionally clean your fuel injectors if they get gunked, because the solvent you put in your tank won't do the job very well. I've been having trouble for a while which I'm becoming fairly convinced is poor fuel delivery (recurring "too lean" CEL, several other possible causes already investigated), and my next move is going to be to pull out the fuel rail and see if I can find any signs that the injectors are gunked. Like, squirt some gas into the air and see if it comes out in a good even spray.
My question is, if they do need cleaning, do I really need to pay a garage, or is there some reasonable approach I could use? Haynes says I should not mess with injectors at home... Is it safe to just open them up and use chemtool, or would I never get them back together right?
I was getting a CEL that said my 2.0 L was lean (bank one) The garage first replaced my O2 sensor, car ran better but the light came back on.
I took it back to the garage, a different tech looked at it. He said my MAF sensor was reporting low O2 , like the car was in Colorado. He cleaned up the MAF and now the car runs great. Before it was sluggish from a stop and gas suffered, also I noticed when I had the problem that at highway speeds, RPM's were higher than usual - Hope that helps
