2002VertGt

Hello, as stated above I have a 04 f150 5.4 and I am getting a p0174 code with slight misfire and major loss of power. I need help diagnosing this so I can fix it properly. Low on funds so I can't have a mech look at it. Any help would be appreciated!!!

alsatropine

iTrader: (2)

Take a look at this thread from another forum. This might start steering you in the right direction.

http://www.ford-trucks.com/forums/82...-too-lean.html

2002VertGt

That doesn't help much since its for the 4.2...I've checked the hose behind the intake on mine...I've checked coils and injectors. I need to clean the maf and check the o2 sensors...I know it's not the cat cause it did it with the y pipe disconnected. All else fails I'll replace the intake manifold gasket but it did not look like there was anything wrong with it. Wish I had a smoker to check for leaks

alsatropine

iTrader: (2)

Have you tried the carb cleaner trick for vacuum leaks?

2002VertGt

Not yet going to this weekend, been kinda busy. Got a friend who's supposed to bring a smoker

coleslaw01

the po174 code. system is to lean (bank 2)

2002VertGt

I know that much trying to figure out why...

2002VertGt

Anyone have any ideas? I don't have $ to just start throwing at it hoping that it fixes it

coleslaw01

Have you checked the o2 sensors?

2002VertGt

Changed the rear o2 sensor..:.problem still exist