code P0172 P0174 P0300

[Joacim L]

Hi!

Hello I am new here.
I just bought my first expedition.
And it started not so good.


I got code P0172 P0174 P0300.
It happend after i filld the car up whith gas.
And I have checked most of the car now.
Fuel pressure OK.
Plugs OK
Coils OK
Fuelfilter changed.
Fuel cap on
Oil cap on
MAF unpluged no change
Sprayed carburator gas around, no result.
It starts and go fine at idle but when i press the gas
its missfire and has no power.

Can it be a clogged cat?
Or do you have any ideas?

The car is:
2003 5,4l (330) 4x4 Eddie Bauer

 

[Bedrck47]

P0300 - Random Misfire

The random misfire DTC indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring.

Camshaft position sensor (CMP)
Low fuel: less than 1/8 tank
Stuck open EGR valve
Blocked EGR passages

One or more EGR passages may be blocked or partially blocked. If this is the case the Misfire Detection Monitor will indicate the EGR port to check for possible blockage.

Check the egr valve for proper operation and for any blockage.

You may want to pull the throttle body and clean out the Exhaust port that goes thru the throttle body Check youtube for videos on this subject

 

[Bedrck47]

click on the below link for some information that may help.

http://www.expeditionforum.com/f42/about-egr-pcv-dpff-evap-iat-tps-maf-23583/#post191356

 

[Joacim L]

Thank you for the link.
Now I can continue troubleshooting.

 

[Joacim L]

It seems that it is the exhaust that is cracked.
I have ordered a new and I hope thats it.
Some one has welded in it before I bought the car
and now its leaking.

 

[Bedrck47]

something to consider or at least look into

http://www.expeditionforum.com/f42/5-4l-2v-intake-manifold-gaskets-p0171-p0174-22940/#post185702