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Trailering
Joined: Nov 2014
Posts: 16
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Help
Got a 99 F350 2wd V10
keep getting 2 different codes
P0174
P0306
I've replaced all coil packs & plugs
All EGR stuff
MAF
All O2 sensors
Cleaned throttle body.
Fuel filter
I'm lost.
Does it need Fuel injectors???
Thankx Bill
keep getting 2 different codes
P0174
P0306
I've replaced all coil packs & plugs
All EGR stuff
MAF
All O2 sensors
Cleaned throttle body.
Fuel filter
I'm lost.
Does it need Fuel injectors???
Thankx Bill
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
The P0306 could be a failed new plug or the wiring harness connector to the COP might be damaged and not making proper contact. just curious but what brand plugs and COP's did you use?
P0174 could be a result of P0306 as they're both related to Bank 2 or the driver's side of the engine.
P0174 could be a result of P0306 as they're both related to Bank 2 or the driver's side of the engine.
Thread Starter
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Trailering
Joined: Nov 2014
Posts: 16
Likes: 0
I inspected wiring to cop but I didn't put a meter on it.
I'll pull the cop & try a spark plug externally to see if it is firing.
Plugs were clean with no carbon buildup.
Thankx
Thread Starter
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Trailering
Joined: Nov 2014
Posts: 16
Likes: 0
I inspected wiring to cop but I didn't put a meter on it.
I'll pull the cop & try a spark plug externally to see if it is firing.
Plugs were clean with no carbon buildup.
Thankx
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 420
From: Long Island USA
Check for vacuum leaks first, you're getting a lean bank 2 code.
Next, check the fuel pressure - should be 28-30 lbs at idle, 38-40 key on, engine not running.
Since you're getting a lean code, AND a misfire code on one cylinder, it only stands to reason that the injector for that cylinder is not flowing enough (or at all). Make sure the injector wiring is good before you go replacing other stuff.
Next, check the fuel pressure - should be 28-30 lbs at idle, 38-40 key on, engine not running.
Since you're getting a lean code, AND a misfire code on one cylinder, it only stands to reason that the injector for that cylinder is not flowing enough (or at all). Make sure the injector wiring is good before you go replacing other stuff.
Fleet Mechanic
Joined: Feb 2011
Posts: 1,812
Likes: 88
From: Thousand Oaks, CA
I would concentrate on #6 - ignition and fuel injection
Use a stethoscope to see if #6 is opening/closing.
If #6 is not clicking, check out the wiring all the way to the PCM.
Try swapping #6 injector with #5 and see if the code moves to #5.
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