In need of some help with a 5.9 problem
Hi, haven't been on this site for a while, but I was hoping you all could help me out with some suggestions. My buddies 1994 2500 series Dodge truck is acting up, and today he had to turn around and head for the garage. He has the 5.9 liter with 155K on it. The truck runs fine most of the time, but then he develops a shutter, lack of power, bad fuel and or ignition problem. He was on the highway and couldn't get it over 30 mph, even when he tried to feather the gas pedal. He said in nuetral it runs fine, revs up and all. The problem comes and goes, and he has gone through a few tanks of gas since the first episode. The garage did a full tune-up the first time, they claimed that was the cause of it running poorly. Now the problem is back, and I am thinking something computerized, like a bad module or sensor. I am not familiar with Dodge trucks, so I was hoping someone can point me in the right direction. Is there a common problem for that year or engine, or something I should be looking for?
Any suggestions would be much appreciated. He doesn't have the money to keep paying the mechanic, so I want to try and help him.