daniel,
yes - that is the fuel pump sound. sorry if "humming" was a bad term..lol.
Sounds like the fuel pump is primeing the system as long as the sounds goes away.
i would have to agree with B....check vacuum's.
Do you know the two black lines that go into the upper intake manifold? Those two are some vaccuum lines you can follow. Be sure that none are cracked or obviously wrong with them.
To check to see if your EGR system is ok, you can go to AutoZone and pick up a "Vaccuum Pump" with their loaner tool program. It'll cost you 35 bucks for a deposit, but as long as you bring it back, they give the money back.
To use that, just take the little green vacuum line that goes into the EGR valve (UFO looking thing next to the UIM - next to the throttle body) and unplug it. Take the vacuum pump and place it on the EGR and start the car. While the car is idleing, squeeze the handle until you get about 10" of vacuum. The car should stumble and ALMOST die...and continue to run that way. If you see the gauge stay at 10" of vacuum, then there is no leak in the EGR system. If it goes down, you've got a leak somewhere.
Very easy to do and check. I just did it a few days back, first time I've ever used a vacuum gauge. lol.
Also, did you ever take care of your TPS problem?
One more thing - driving style. When the car died while driving, what was the engine doing? idleing? reving high? etc...
AND....are there any abnormal sounds coming from the engine bay such as higher than normal "Hissing" or anything...
