A week ago this problem started. Start my truck and the rpms idle at 750 then drop to 250 and this repeats the will die. Restarted drove to work. Pull up to stop light\stop sign same thing. took it to the dealer charge $160 to reset computer dealer says should fix problem. drove home fine way to work next morning died three times on the way there! going back to dealer ship monday. truck 36500 miles. dealer told me others have had this similar problem anyone have any ideas? its not throwing any codes and runs like crap lately. GGGGGRRRRRRRRRR. Any help or suggests would be great.
Thanks in advance

 

Ever change the fuel filter?

 

I've had that same problem in my '98. It happened twice and had 2 different causes. The first was a bad mass airflow sensor, it needed to be replaced. I tried cleaning it and that's when it finally threw a code. It drove fine as long as I kept the RPM's over 850-1000ish.

Second time was 2 vaccuum leaks, but it threw a lean code and ran like crap pretty quickly. That one made a sucking noise at idle/low RPM tha was pretty easy to hear.

Hope that helps.

 

Yup all up keep is done on time or as clode to as possible

 

I have had idle problems for over a year (just like your having)....took it in and they told me i had bad gas, took it to another dealer and they told me they could not find anything. It finally got so bad the last time it stalled the engine light came on, and stayed on. This time when I took it in, they replaced the throttle body. Now the truck runs better than the day i bought it.