Occasionally mine will stumble at 1800-2000 RPM's. I think the problem is in the VCT on bank 1. Either the plunger in the VCT solenoid is sticking or the VCT phaser on the front of the cam is binding up. I may take the car to my sons shop tomorrow and see if the VCT solenoids on banks 1 & 2 are identical. If they are I'll swap them to see if the code changes from P0340 to P0345. That should tell me whether I have a bad solenoid or not. If the code doesn't change it's probably the phaser.

 

<div class='quotetop'>QUOTE(Sonic05 @ February 18, 2006, 12:31 PM) Quoted post</div><div class='quotemain'>
I would recommend just replacing the sensor if it's not to much $$. I've seen a lot of cam and crank sensors have this exact behavior. It takes a while for them to heat up, and then the coil inside them will intermittently open or short. It is next to impossible to catch it acting up.

Just as a good example, my fathers '96 Grand Marquis (4.6L) was throwing the same code. It was intermittent, and only after it had been driven a while. I finally caught it -- the sensor coil would open (no connection). Slapped a sensor in it, and six or so years later it is still fine.

That sensor is currently $13 from AutoZone. I'm sure one for our cars is not much more.
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Or you could swap the bank 1 & 2 sensors around to see if the code changes to the other bank. My code still shows bank 1.

I didn't get a chance to swap the VCT solenoids today. I downloaded the firmware update for dataloging. The weather here is terrible today. In the 20's and very windy. Maybe tomorrow.

 

<div class='quotetop'>QUOTE(don_w @ February 18, 2006, 5:10 PM) Quoted post</div><div class='quotemain'>
George.. how does it show which bank? What am I not seeing?
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P0340 & P0344 is for bank 1. P0345 & P0349 is for bank 2.
OBD II codes <span style="color:#FF0000">LINK</span>

 

<div class='quotetop'>QUOTE(don_w @ February 18, 2006, 6:49 PM) Quoted post</div><div class='quotemain'>
Thanks George. The website I had looked at for the codes did not specify which bank. That's good to know. Am I correct in assuming that bank 1 the driver's side?
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No. The bank is determined by the location of the #1 sparkplug. On a Ford RWD car the #1 plug is the first plug on the passenger side. So bank 1 would be the passenger side.

 

<div class='quotetop'>QUOTE(169stang @ February 18, 2006, 11:36 PM) Quoted post</div><div class='quotemain'>
I was looking into this a bit and read somewhere where another person had this in a 97 GT. 2 things were found to be the cause of this after replacing sensor's and wasting money on checkups and such. They found to be a RF interference. They also found this due to certain types of spark plug wires-aftermarket, that created more than tolerable RF interference. The RF sensors are right by the Position sensors on the 05/06. Maybe a direction to look into. Just trying to toss ideas.

Okay, Sorry for the last post. I honestly just read the whole thread after posting. It seems George is on the right track based the little that I've dug up. Where did you guys run your wiring for the water pump? I ran mine just below the RF sensor. I, fortunately, haven't had this code yet. Then again, my car hasn't ran in a few months. Maybe cool weather, different accessories running?
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I disconnected the wires to the waterpump and still got the codes. I think I've looked at everything that could cause RFI. I think my problem is in the VCT itself.

 

I first got the P0340 code during a run at the dragway last October. I got the code for a couple days after that and it went away until recently. The P0340 comes up like clockwork now, every 2nd startup. I got the P0340 a lot more often than the P0344.

 

No codes today. I returned the tune to stock. I updated the X-cal 2 to the 1.11 firmware. I loaded my all motor tune back in the car and it ran fine. Those evil gremlins must know it's a holiday today. [img]style_emoticons/<#EMO_DIR#>/icon_mrgreen.gif[/img]