2005 fx4 5.4 4x4. I have 195k miles on it. Ran perfect but had valve gaskets leaking. Changed those out, and now has a p0207 code. Changed the fuel injector in cylinder 7, but still have the p0207 code. Anyone have this happen or any ideas???

 

i'd check that injectors wires and plug being that they were off during the gasket change.

 

PO207 is a wiring code! I had the same on #2. Get the pinout for the PCM and ohm it back to the injector connector. Compare to another that is known good (like #6). Also inspect the connector it's self for cracks. Do be certain it's 'clicked' into place for that will also throw the code.

In my case the wiring was good and I replaced my injector to solve the issue. That should have been a PO307 code for me, but.. it read PO207.

I have the pinout for the 2005 4.6l. If you can confirm it is the same for the 5.4l, I'm happy to pass it along. I'm not sure it is...

 

With all due respect deserved for fixing it - for future clarification for members, the PCM does not look or report a P030x if it determines it UNABLE to execute combustion. This is the value in a P035x as in a P020x. If the injector or the COP can't fire due to a circuit problem (open or short), then it is futile as well as confusing for diagnostic to report P030x. In fact P030x is determined by a far more reliable test. The PCM processor is fast enough to detect the 'slight' acceleration of the crankshaft rotational speed that is expected immediately following the spark event. If THAT is missing = a P030x. That can occur by real poor compression, valve timing too retarded for commanded fuel mixture, and a host of other things.

Also I note in another post you (perhaps inadvertently) indicated the injector being closed circuit. The "injector" is of course normally closed - but the circuit is exactly like the COP. The PCM can see 12 volts through injector coil and current draw when it grounds the control wire. Absence of either of those = P020x

FWIW. Cheers:

 

Update, the number 3 cylinder had a misfire, changed out the coil and plug. Guy who did my valve gaskets washed the engine before he did it, I know, I wish I had told him to not do it. The number 3 had water in it. The injector code is still showing on number 7 injector still. The NOID light shows that the computer is giving a good signal to the number 7 injector. Can still fill a little rough idle but we cant figure out what is causing the issue now. Could it be the computer even though a good signal is going to number 7 injector?

 

If you had water in one spark plug well I would pretty much guarantee there is water in the other ones. And this CAN/WILL cause misfires that give no check engine code. Remove all ignition coils and blow out with compressed air. Might even leave the coils out overnight with the hood open so it can really dry out in there and then reinstall.

computer failure is rare so I would investigate all other options first. In fact the fact that the noid light blinks seems to confirm your wiring and the computer are both GOOD.
Clear the codes and then check again to ensure it is a persistent code and not just lingering from previous work.
make sure its not a p0307 and you are writing it down wrong.

 

I would blow out the plug wells before you remove the plugs...

 

Are you saying you still have the PO207 code? I read you replace on #3, yet not sure what you did on #7..

If you replaced as well on #7, have you cleared codes and test run? I had a persistent code showing on my pocket (cheap) OBD reader that didn't show the I ran FORsacn. I'm rather leary of my pocket OBD reader..

What's the rpm of this idle? I had that as well and it was a vacuum leak. Yet I had a lean code on my O2 #1 sensor showing.

 

I took it to ford to do a diagnostic. They said the computer wasnt delivering message to number 7 injector and needed the computer replaced. Ordered new one from Flagship 1 of course. Installed it yesterday and fired right up and the check engine light is not on. Not sure if i will need to drive it the 50 miles before it will or will not kick on. So will see how that goes.

 

Personally I would have e tried a reflash before replacing a PCM. Having IDS at your fingertips is a blessing. It can pinpoint the issue and isolate so it can be properly repaired without throwing unnecessary parts at it..