02 explorer. 7 codes. Need help

[StxHammer]

Hey everyone. I have a 02 explorer. V6 4.0 sohc. I'm getting the following 7 codes: P0171,0174,0175,0303,0304,0305 & 0306. Any help at all would be appreciated. Thank you in advance.

 

[fordysenior]

Maybe this link will help? http://www.explorerforum.com/forums...ostic-trouble-codes-dtcs.228242/#post-2054355

 

[StxHammer]

I researched the codes. Just trying to see if anyone had experienced this before or maybe where I should start to find the problem. I replaced the spark plugs this week already.

 

[Drewmcg]

Can you give us any history on this problem? I.e., did they come on all at once? How long has your check engine light been illuminated? Does it ever flash? How many miles on the engine? Has your coil ever been replaced? Any history with the catalytic converters?

Offhand, it sounds like a vacuum leak causing lean codes/misfiring. Could be leaky intake manifold or many other sources of vacuum leak. But the strange thing is having BOTH a P0174 AND a P0175: how can Bank 2 be both too lean and too rich?