Subject: Mitsubishi Diamonte
Question: My 1992 Diamonte LS is smoking, burning oil. I know the vavle stem seals are shot. But recently...I have an intermittent problem. Car shuts off and won't start unless you let it sit for 15 minutes.
The RPM guage flutters, I hear a "clicking" noise in the passenger floor board, and the car shuts off. Won't start unless you let it sit for a while. I', thinking ECM (electronic control module). Last year it failed pollution control, so I put a new converter on it and 3 months ago I put a new O2 sensor on it. What do you think is causeing the shutt off, the clicking in the passenger floor board?(RPM meter flutters just before it shuts off)??? (BRIAN)
Answer: Brian,
It is very possible to assume the ECM may be faulty. Read the following article for further information:
http://90gsx.com/eclipse/cap/caps.htm

Your year of Diamante falls right in line where the faulty capacitors were installed on the ECMs from the factory. Plus, the clicking you mentioned is a sure sign of a faulty ECM. The clicking you are hearing is the ECM resetting itself over and over. You will get all sorts of intermittent problems with a malfunctioning ECM.
Good luck!