2006 FORD F150 code P0302,P0304

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Hi changed sparkplufgs,coils,invert coils and injectors still have misfire on cylinder #2 & #4.

Help needed.

BAST.

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asecmt · **Posted:** Sat Nov 01, 2008 5:36 pm

I would do a compression test. I'm not calling you dumb but you changed the second and last plug/coil on the passenger side right?

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Yes you're right asecmt,that's what i did.

Unfortunatly there are always the same cylinders that don't work.

I don't know what to do....

BAST.

asecmt · **Posted:** Sun Nov 02, 2008 10:34 am

You may have to remove the PCM and the bracket it mounts to and be sure to disconnect the battery first, but I have seen that the PCM harness sometimes will rub on that bracket and also around the A/C accumulator if they are rubbed through then just seperate and seal real good with some electrical tape.

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Is it easy to change or do i have to reprogram it?

Do i have to change the key and the ignition cylinder too?

Where can i find an other PCM?

BAST.

asecmt · **Posted:** Sun Nov 02, 2008 12:45 pm

no no no don't change the pcm the wires that go to the pcm sometimes will rub on the bracket. Only remove the PCM and bracket to have better access to the harness to look for bare wires.

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

I'm probably sure that it is not the wires....

The last thing is the PCM..i guess.

asecmt · **Posted:** Wed Nov 05, 2008 6:24 pm

You can change the PCM if you want to but I would check the wires first. Seen wire problems more than PCM problems.

dnold · **Joined:** Thu Nov 13, 2008 9:49 pm **Posts:** 35

Have you checked for an injector problem or vacuum leaks?

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Hi

Yes i inverted the injectors and problems are always one the same cylinders.

No vaccium leaks detected.

Could be the catalytic converters clogged or dirty fuel...

What do you think?

asecmt · **Posted:** Thu Nov 20, 2008 5:41 pm

you need to check and make sure you are getting power and ground the signal to the injectors and coils on the affected cylinders. If it was the gas filter then all cylinders would be misfiring and if it was a convertor the all the cylinders on bank 1 would be misfiring. I dont see any numbers from a compression test did you do one? These engines have been known to break valve springs and also wiring problems like it said earlier.

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Hi

Yes i did a compression test on cylinders 2 and 4.

Compressions are ok.

Checked all ground connections,connectors...

I never heard anything about valve springd break.

I changed the CMCV because bank 1 stayed closed(code P2006).

Now it's ok but still have misfire on cylinders 2 and 4.

Remember that it is a FLOOD TRUCK RECOVERY.

BAST.

dnold · **Joined:** Thu Nov 13, 2008 9:49 pm **Posts:** 35

Flood vehicles mean trouble. Need to look for corroded connections, grounds. Looking more like Ecm with bad injector drivers.

asecmt · **Posted:** Sat Nov 22, 2008 12:05 pm

What is the vin code for the engine?

bast0325 · **Joined:** Sat Nov 01, 2008 7:14 am **Posts:** 14

Hi ,

The PCM was changed AFTER the flood it is not the original PCM.

VIN :1FTPW14526KB63352

BAST.

2006 FORD F150 code P0302,P0304

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