Supercharged Marauder Throwing Code P0340 NEED HELP PLEASE!

[BackNBlack]

Bump......................

[BackNBlack]

Dropped off at the Dealer this morning for "exploration " to find the Problem...STAY TUNED!

[Black Terror]

Good luck with the Dealer, hope they can do what needs to be done!

[BackNBlack]

Thanks, Bill...they put in a new Battery (Motorcraft 850 Super Duty *which is ALL I've ever run...and told me the CHECK ENGINE was GONE!) I went to pick up the car...started it up...CHECK ENGINE light was ON as soon as I fired it up!

Since then they took time to chase electrical connections. They have now FOUND that the PCM is NOT sending ANY Current to the Camshaft Sensor Unit Bank #1 that I have had replaced. But then again...the question is...If there is NO current going TO that sensor...then HOW is it "intermittently" throwing a code??!!

They had me check with my Tuner to make sure the current WAS NOT shut off in the tune...which of course it wasn't. NOW...we are doing some driving and Data Logging to see if the dealer can turn ON the current to the sensor using their IDS. *WITHOUT messing with the Tune!

ALSO...I'm on a SEARCH for another PCM...in case THAT is the issue. Hopefully @mustangeddie can come through for me?!

[Black Terror]

Typical Dealer, don't know how to troubleshoot electrical issues. They just want to change parts until they luck upon what fixes the problem. Good luck finding a PCM that matches your vehicle.

[BackNBlack]

You are 100% CORRECT Bill...we SURE DID have it NICE 22 years ago @Team Ford, though...didn't we??!! THOSE were the DAYS!

[Black Terror]

Yes, and had Carfixer, and others to help troubleshoot problems.

[Black Terror]

Team Ford lost all their good people when they stopped them from working on our vehicles unless you went thru front counter. Today, it is a part changer Dealership. Sales and Service have gone to pot. Pugmire is the same way. They did things to my Vehicle that I didn't authorize so I use someone else for service, unless it is a Recall or Warranty item.

[Hummer_03]

Hey bud, I've been down this road. The alternator is the issue.

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[BackNBlack]

Hey bud, I've been down this road. The alternator is the issue.

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I've heard this, as well. And I ASKED about this with the Tech...he says the Alternator "is working fine..." I ALWAYS WONDERED due to The Trilogy needs the alternator turned AROUND backwards.

What choices do we have on Alternators...that are NOT made in China?

[BackNBlack]

U P D A T E:

After a couple on here suggested "the alternator"...I conveyed that to the Dealer...who was REALLY skeptical. As i was, too. WHY would the alternator have any effect to a "Camshaft Sensor Bank 1" which seems to be a simple diode that counts timing of the camshaft with a simple wire to & from the PCM. Well...it seems my young tech who was working on it...couldn't get it out of his head last night. So, he came in EARLY this morning (5am) to try something...and it WORKED!

This 1st graph shows the car running, WITH the alternator "Plugged-In' and you can see the LARGE SPIKES which indicate the Camshaft Timing (in 100th of milli-seconds of timing)
MARAUDER Graph 1.jpg

As you can ALSO see...there is "NOISE" in-between EACH and EVERY cam revolution...and in SOME of that noise is pretty predominate "spikes' which he felt COULD trigger a reading on the PO340 - Camshaft Timing Sensor - Bank 1 (WHICH upon further inspection...the young Tech LEARNED that that sensor does NOT need Power from the PCM. IN FACT...it has small magnets inside which generate the power in which it operates. Therefore, the simple single wire to & from the PCM just convey the clean or "noisy" timing of the camshaft, were it to be off a tooth or two.


The NEXT Graph shows the car running with the Alternator UNPLUGGED...

MARAUDER Graph 2.jpg

See how "CLEAN" the transmission from the sensor is WITHOUT the alternator engaged. The "FLATLINE" between strokes indicate a MUCH more smooth operation WITHOUT any possibility of in-between "spikes' that could unsettle the sensor and provide what had become very random "PO340" codes.

SO...thanks again to @Hummer03 and I forget whom else said "it's the alternator'...you were RIGHT! *I hope!

NEW Ford reman alternator is on the way tonight...young tech will be transferring my current Alternator's powder coated black covers to the NEW (RM) alternator...and we will SEE if I can get my BAD BLACK ***** BACK OUT ON THE ROAD!!!!

Sick MARAUDER 1.jpgSick MARAUDER 2.jpg

[Hummer_03]

Congratulations. Im glad you found a Tech that knows how to use a scope. There's a lot more to the charging system besides Amps and Voltage.

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