Man this truck is Killen me.!!!! 2002 harley f150 Just got it running good did one wot burnout around a rite hand corner , now running worse than ever I just put new Ford cops , new factory plugs , new iat sensor , fuel filter , rebuild rearend what's the sense if u can't beat it a little .It's miss in at idle now and continues up to 45 at least . No codes no cel what now fuel pump. Any suggestions would be appreciated

 

Auto zone says code 174 bank 2 lean

 

<table border="1" cellspacing="0" cellpadding="3"> <tbody><tr> <td align="left" valign="top">P0171 - System to Lean (Bank 1)</td> <td align="left" valign="top">The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information.</td> <td align="left" valign="top">Air Measurement System

• MAF sensor (contaminated, damaged, malfunctioning, etc.)

Fuel System

• Fuel pressure regulator (leaking, malfunctioning, etc.).
• Fuel filter plugged, dirty.
• Fuel pump (weak, check valve leaking, etc.).
• Leaking/contaminated fuel injectors.
• Low fuel pressure or running out of fuel.
• EVAP canister purge valve leaking (when canister is "clean").
• Fuel supply line restricted.
• Fuel rail pressure sensor (incorrect reading).

Air Induction System

• Air leaks after the MAF.
• Vacuum leaks.
• PCV system (leak, valve stuck open, etc.)
• Improperly seated engine oil dipstick.
• Air induction turbulence due to incorrect air filter.

Exhaust System

• Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.).

EGR System

• EGR valve tube/gasket leak
• EVR solenoid vacuum leak

Secondary Air Injection

• Damaged/malfunctioning secondary air injection system (mechanically stuck valve).

</td> <td align="left" valign="top">View Freeze Frame Data to determine operating conditions when DTC was set. Observe LONGFT1 and 2 PID(s). Refer to Section 2 , Adaptive Fuel DTCs Diagnostic Techniques for more information.</td></tr> <tr> <td align="left" valign="top">P0172 - System to Rich (Bank 1)</td> <td align="left" valign="top">The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a lean calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information.</td> <td align="left" valign="top">Air Measurement System

• MAF sensor (contaminated, damaged, corroded connector, etc.).

Fuel System

• Fuel pressure regulator (vacuum hose off, diaphragm leak, malfunctioning, etc.).
• Leaking fuel injectors.
• Fuel return line restricted.
• Fuel rail pressure sensor (incorrect reading).
• EVAP canister purge valve leak (when canister is full).

Base engine

• Engine oil contamination.

</td> <td align="left" valign="top">View Freeze Frame Data to determine operating conditions when DTC was set. Observe LONGFT1 and 2 PID(s). Refer to Section 2 , Adaptive Fuel DTCs Diagnostic Techniques for more information.</td></tr> <tr> <td align="left" valign="top">P0174 - System to Lean (Bank 2)</td> <td align="left" valign="top">The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information.</td> <td align="left" valign="top">See Possible Causes for DTC P0171.</td> <td align="left" valign="top">See Diagnostic Aides for DTC P0171</td></tr> <tr> <td align="left" valign="top"></td> <td align="left" valign="top">
</td> <td align="left" valign="top"></td> <td align="left" valign="top"></td></tr></tbody></table>

 

Do u think there is any chance a loose soon to blow plug could cause the code PO174

 

That I do not know. But it would be easy enough to see. Check your plugs on bank 2. Which is the driver's side.

 

Slim to none.

Intake gaskets.

 

OK THANKS I'm waiting on the 3 that I need to put supercharger back on after I eliminate my pic elbow do u think it could also be the main intake gasket

 

If it is showing lean any gasket anywhere that would allow in extra air is a suspect.

 

Intake gaskets.

 

Thanks to everyone for helpful info I found a corner piece of my lower inner cooler gasket missing will have it back together tomorrow