Lost

[tadams11201]

lllll

[tadams11201]

One additional item, under idle conditions, it will idle great and rev quickly.

[JWBFX4]

Originally Posted by tadams11201

It is not throwing any codes ande being as it runs like it should stock WITH the performance setting, I would assume that it isn't a misfire. Please help.. cannot find anything on the web related to this. 2005 f150 5.4l

I might just be having an off morning but what does stock with performance settings mean??

All the things I had thought of looks like its been done....cats, O2's....Dont really know what else to suggest.

[cleatus12r]

Have them attach a fuel pressure gauge to the fuel rail and watch fuel pressure under acceleration.

Also, have them check for a plugged catalytic converter. Easy to do by watching the MAF sensor data.

This sounds just like a lack of airflow or a severe lean condition.

[tadams11201]

I was trying to ellaborate that when it is using the performance setting, it runs like it used to in stock mode. That is the only way it will run half decent. They had told me that they checked the injectors but will have another dealership check the pressure and injectors after the fabrications they told me before. Also, they replaced the cats when they replaced the cam phasers..I hope that they are not bad again. I tend to agree with the lean issue. I will post an update after next week when I can get them to check it. Thanks for the input. Oh BTW, when it first starts, it runs great for about half mile to mile then falls flat.

[Longshot270]

Well maybe it has to do with the sensors that activate at higher temperatures like the O2. I can't think of any sensors that would at the moment but maybe someone else will.

[Jackpine]

That DOES sound a bit like O2 sensors giving incorrect information after they've reached operating temperature, doesn't it?

I'd certainly try a different dealer.

Please complete the information in your User Profile too, to help Bill. You need to add your HEX code, the Gryphon model number and Serial Number. This DOES NOT sound like a Gryphon issue, of course, but that information could be useful someday.

- Jack

[tadams11201]

After my only other local checked my truck (they had it for two days and stated worked on it three hours), they are lost too. Said they would have to start charging me the '$90' an hour service fee till they could find what is wrong. So, after paying $1800 for cam phasers and all the above mentioned, two diagnostic fees at other dealership to try to find problem ($180), paying $90 to have them turn on the cruise control in the PCM that the first dealer turned off ($90), a new starter where the first dealership didnt tighten when replacing the cats($192), 8 trips to the dealerships... I officially hate Ford. They stated today they need to 'put stock tires on it to see if it still acts up'. I only have 33's! UGH! So getting close to $2300 and truck still runs exactly the same. This dealership wants to get the Ford engineer involved but no idea when he/she will be there or how much that will cost. Please.. is there a Ford engineer out there who might can help! BTW the O2 sensors where replaced with the new cats.

[Longshot270]

Too bad there isn't a warranty at the dealership where if they can't get it straightened out then it's free.

Have they tried reflashing the computer since it started doing it? I'm thinking that if nothing mechanical is causing a problem then it has to be a bug in the computer.

[88Racing]

Did they happen to check the fuel control module?
It's located back by the spare tire and the wiring can get corrosion due to its location.