Engine Help - Problems persist

Yourfavgui · Mar 28, 2015

Ford has been our vehicle of choice for 4 generations and may stop after this!
I need help I'll try to be brief.

Last month my 2005 expy 5.4L 108K miles started with all the classic signs of cam-phaser failure (rough idle, stalling, sounds like a diesel). I attempted every fix possible to no avail, I took it to our Ford dealer and they said low oil pressure has caused cylinder wall damage= NEW ENGINE. I bought a re-manned engine from a local shop with upgraded oil pump and ratcheting tentioners to avoid chain slap and new VVT solenoids. I installed it and have the exact same problems. I get a P0012 for bank 1 over retarded. I'm sooo angry that I've spent $4500 and nothing was fixed. I think there is a PCM issue or wiring problem. Please Please help.

stamp11127 · Mar 28, 2015

If it is the same problem as with the other engine I would look at the harness for the solenoids first.

Yourfavgui · Mar 28, 2015

Wouldn't the state of the art computer diagnosis from the dealership help pin-point a wiring issue?

stamp11127 · Mar 29, 2015

Only if they take the time to fully diagnose the problem - and the customer is willing to pay for the time involved.
The industry has given the impression that the "diagnostic scan" is a master mechanic that fixes all problems with any vehicle. Nope, nothing more than a super duper high end code reader and programmer. Someone has to interpret the results it generates. It points you in the right direction most of the time.

Yourfavgui · Mar 29, 2015

Wiring checks ok

Tested harness from the plug at the PCM to the solenoid plug and it seems fine

mystik · Apr 2, 2015

Possible Solutions The main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool

Read more at:*http://www.obd-codes.com/p0012
Copyright © OBD-Codes.com

mystik · Apr 2, 2015

I found this online. Hope this helps

Yourfavgui · Apr 6, 2015

mystik said:
I found this online. Hope this helps

Thanks you mystik,
Your second post did not have a link. I hope you can still post it.

I did unplug the CVT from the truck and used a jumper wire from each solenoid directly to the battery to actuate them, one seemed to work less effectively so I replaced both of them, unfortunately the expy is experiencing the same problems.

I have my Expedition at the engine shop, I have asked them to get the hot oil pressure reading and check the timing.

It does not rattle at start up, but starts after driving a short distance, and is only noticeable at idle (Its hard to tell cruising around).

Side note: The other day after getting off the freeway the expedition was sputtering and ready to stall but no codes.

A friend suggested the MAF. Has anyone see the MAF cause issues like this?

mystik · Apr 6, 2015

The 2nd posting was for the 1st posting, just letting you know where I got the info from sorry for the confusion. Listen, if you have a MAF issue, normally you should get a code. Im thinking when your engine is hot, your ECM might be shorting out or you have a shorted wire somewhere. Obviously its not the engine, cause you replaced it.This has to be narrowed down. Im wondering if your ECM has ever been flashed (just a thought). I am going to continue researching your issue. Keep me posted

Engine Help - Problems persist

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