I have 2 idi trucks:
1. '93 Crew cab dually, automatic, 230,000 miles.
2. '89 Crew cab dually, automatic, 30,000 miles on Warren reman. engine.
Here's the mystery:
#1 will run circles around #2. Both run very well.
#1 idles quietly. #2 is louder at idle and has been timed recently by...