1998 Toyota 4Runner Limited (V6/4WD)

Tiny
SJPSPARKY
  • MEMBER
  • 1998 TOYOTA 4RUNNER
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!
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Saturday, November 24th, 2007 AT 1:16 PM

2 Replies

Tiny
TLAMPHEAR
  • MEMBER
Looking at your problem I did have pretty much the same issue :) with my 4Runner. Driving along and all of the sudden it dies on me with no warning. Electrical was fine. I pulled the Mass Airflow Sensor, located just past the air filter box. I bought a can of Mass Airflow Sensor Cleaner at Pep Boys and sprayed the inside wires on the sensor (just spray and don't rub because they are very fragile). Let it dry for a little bit and put it back in. Not sure this is your problem but for about $7.00 for the can of cleaner and very little labor it is worth a try.

Good luck!
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Wednesday, November 28th, 2007 AT 9:50 AM
Tiny
SJPSPARKY
  • MEMBER
THANK YOU VERY MUCH FOR YOUR TIME AND YOUR SIMILAR PROBLEM YOU SHARED WITH ME.I WILL DO YOUR RECOMMENDATION. THANKS!
AS IT TURNS OUT, I DO NOT HAVE A BAD GROUND WITH MY HID SYSTEM AND WAS NOT AFFECTING MY ENGINE ISSUE.
THANKS AGAIN, STEVE
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Monday, December 17th, 2007 AT 4:38 AM

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