all i can say is wow.... an 06? wow. maf and iac... in the tube from the air cleaner box. if you take the top off the air box and look up the tube you will see them. just spray some maf cleaner on them and let it dry.
as far the codes. tahts is weird.. but this is something i would like you to do. etm. this will give better info on whats going on here. maybe. check out the link and report back when you get the info.
http://www.taurusclub.com/forum/82-...com/forum/82-maintenance-repair/149931-experimenting-engineering-test-mode.html

 

Thanks for the reply

I will give this a shot in the morning.

 

Honestly, it sounds like you have some dirty power that might be causing some of your issues, which would be caused by a bad rectifier. I would replace the unit and also replace the battery to be on the safe side. This can confuse the computer if the noise gets into the cam sensor and cause misfires. Your surging is caused by the engine running lean either as a result of vacuum leaks or lack of fuel pressure. Since this happens on the highway rather than at idle, I would lean more towards a fuel pressure problem (no pun intended). This could be a bad pump or regulator, the result of the noisy DC, or as simple as a bad fuel pump relay. I would get a fuel pressure gauged hooked up and take it for a drive up some hills and see how the pressure responds.

Use ETM to monitor the voltage as you drive around. It should be a pretty steady 14 volts or more. If it's moving around all over or spiking, then the alternator is definitely bad.

Start with the simple things first and take things one at a time. It's going to take some time and money to fix, but you can save yourself time by ensuring things are properly diagnosed before part swapping.

 

I have run the ETM. Quite a bit of info , but not sure what it all means. Should I list it all or looking for certain items.
I did as behlinla suggeted and the voltage is all over the place, so I guess I get to replace the alternator. Doesn't look like that bad of a job, I just need to figure out the loosening the belt part.

 

Alternator jumped all over between 13 and 14.2. Based on this and the Ford dealer suspecting the rectifier is bad I am going to start with replacing alternator, then reset and see what I get.

I too suspect fuel. Honestly I have read all the forums and I am not quite sure where the port is for attaching fuel gauge on my car. I am going to go to Autozone this afternoon and maybe someone there can point me in the right direction.

Thanks for your help.

 

There is no schraeder valve on the fuel rail to manually check fuel pressure. Have you checked the fuel pressure PID to see if the pressure is 39 psi?

 

Fuel Pressure



I assume I need a scan tool for this? Any recommendations on scanner? Will the one they use at auto stores give this info?

Started stalling at idle tonight. Replaced fuel pump relay just in case- no improvement.

Thanks for the reply.

 

low voltage will cause stalling. it happened on my 07 when the battery went bad. I would try the alt first before even considering doing the pump.