During the summer I posted the following:
******************************************************************************************* 2000 with 90,000 miles just started the symptoms in subject line, three episodes so far in last 5 days. SEEMs like fuel starvation and will replace fuel filter first then test fuel pump BUT puzzled as to why symptoms only appear with AC on and blower on high. Could be just coincidence but thought someone would have a suggestion. Coolant temperature does NOT seem abnormally high according to gauge. Engine returns to normal after a shutdown and 30 minute *************************************************************************************************8 The problem never went away, we just avoided it by not using the blower on high Now that it has gotten cold it is still happening when using the heater. Now even with the blower on low, the problem poor running symptoms will appear after 30 or 40 minutes..I think we have a bad blower motor. It is getting hot when run on high, or for long periods even an low, as it gets hotter, its resistance increases and draws more and more current to run until the current draw disrupts the FI system.
I am going to replace the blower motor. I see in the manual that the blower unit includes a resistor, I assume this is foe the low speed function and that for high the resistor is bypassed. This I am tentatively ruling out a bad resistor.
If anyone has any info to shed or disagrees with my diagnosis please post before I order a blower motor.
Thanks, Bob