Hi I'm new to this site , I have been asked to close Q I have asked already but don't know how on my iPhone to close then please help

You mentioned that you welded the BCM was it out of the car and unplugged also make sure that relay you replaced is the correct one make sure plugged in backwards.

Why did you post this question then?

Yes iac valve or throttle control valve. Check for vacume leaks first.

Even the people you said that the alternator is good and you still loosing battery,why don't you ask them to do a power leak test,`like any circuit on radio,lights body contacts leak. Probably you might have somewhere something killing your battery. If what I said is already done,just do a final test by changing the alternator and see the outcome.

Ask a dealer for help

You don't give out security codes,
including your radio

Why would a web site know anything about
your vehicles security system?

With melting parts that could be an issue with the diverter valve, but the electrical issue adds a new complication to the deal. I'll have to admit, my experience with SMOG systems is limited. I don't know exactly how that shop did your electrical test, but unless they did a live test where they measured how much current draw you had during operation of the pump, I don't know how they could draw any conclusions as to if the pump is good or bad. The electrical solenoid as I understand it, is not part of the pump and is there to divert the air to the proper location and then closing during deceleration to prevent backfire. I would think since you are having issues with the fuse and melting hoses, that your diverter valve/solenoid is the issue. If none of this information is useful to you, I certainly wouldn't hold it against you to ask for a refund for this service and seek help from another member. If the information is useful, I am glad, and ask that you don't forget to rate.

Up under the dash, probably clipped to the steering column mount brackets or close by. If you already have the new one, the old one looks similar or just like it.

Every 125,000 k or 75,000 miles you change
timing belt

No Dealers you could call & ask?

on some models they had a crank located on the roof,, if you have a knob up there that you don't know what it is,, try turning that

CONTACT FORD with your VIN# to get the code you need