 Computer problems? Low RPM reading.
I have a 1994. About 1 1/2 years ago the truck would just start running rough. The RPM gauge would read low, the check engine light would come on. I would have no throttle response. It was like I was starting from a dead stop in 4th gear. Then it would stop, and the truck would run fine. Well, I took it to a buddy who replced the computer with a used one. Truck ran fine for about 8 months, then the same thing. Replaced the computer with a brand new one. Truck ran fine for about 9 months. Now it is starting again. I noticed the temp. gauge is not always working. It will not read the temp. It did it the other day for about 3 miles. Then stopped. It has not messed up in 4 days. HELP | 
