Hello there -
My '91 4 door automatic has been annoying me for a couple of years now.
Three years ago, the transmission was replaced, exhaust also. Since then, i have had an overheating problem while accelerating. Any thing over 2500 will make the temperature jump.
I have replaced the guage sender, the radiator, hoses, water pump and fun clutch over the past few years as these were more or less worn out.
To make things livable, i have drilled a couple of extra holes in the thermostat. It takes a while to warm up, but the temp sits at the "o" in normal. Hit the gas and watch it jump for a minute or two and go back to where it started. Yes, the engine really does get hot. Without the holes, i was overheating when it was 15 below zero. Tried replacing the oxygen sensor - no change.
It doesn't matter if driving or reving in neutral - same thing - temp spike when accelerating.
Sounds like it is running lean?
190,000 miles.Could it be an issue with our newer blends of gas?
Help,
Randy