I have codes po171 & 174 again.

Well I did what you said and wow it worked no more check engine light and it runs a lot better. I sure do thank you and so doz my truck. The parts ran about $75 and it took me about 4 hours thanks again.

Well I sprayed and nothing, the MAF has been replaced and cleaned, still has the same 2 codes. some times on the road I can put the peddle to the floor and she will take off and sometimes it will just go flat and nothing no power at all, but if I let up on it a little it will take off sometimes.

Thank you ill get back to you with my find thanks again. Well my gasket was blown too. There was a lot of oil in there too that I cleaned out. No more codes thank you very much and my truck runs great again.