1998 Toyota 4Runner Limited (V6/4WD)

Hello,

I am a service member stationed overseas in South Korea and experienced my first "failure" of my beloved 1998 Toyota 4Runner Limited w/ V6 & 4WD.

I was driving on the highway and when I let off on the accelerator, my truck stalled out. I was able to make it to the side of the shoulder with no power anything. Still had my electrical system (headlights, dash lights, etc). I had been driving for about 1 1/2 hours before this failure came out of nowhere.

Seeing I am in Korea and there is like one factory Toyota repair facility in all of a city of 8 million, I am forced to goto a non-factory mechanic (but ASE) mechanic on base. However, to save some time and money on problem solving the issue, I did some research and came up with my list of five.

1) Bad ground for my HID foglight system (possible issue with my ECU computer), which was re-wired and installed professionally no less than about 30 hours previous. However, the truck ran great up until the stall.
2) Verify vacuum or fuel pressure issue (possible bad fuel pump). Maybe it was time to fail.
3) Check Throttle Position Sensor (TPS)
4) Check Mass Air Flow (MAF) Sensor located as the first sensor on the exhaust system (please verify location of this sensor)
5) Clean Idle Speed Control (ISC) Valve located underneath the throttle body with throttle body cleaner to remove carbon. I read if I didn't have a check engine light, a dirty ISC valve is a source of many idle problems my my Toyota V6 engine.

I rank order the above list based on cheapest fix to most expensive. However, I think it is either #1 or #5. The HID install and stall seem too much of a coincidence. And I have read alot about dirty ISC valves on the internet.

I would appreciate anyone's time and expertise in this matter. Thx!