You might want to try getting the Malfunction (MALF) code from the CEL (Check Engine Light). I have been having a hell of a time with mine surging and stalling , kicking , bucking, up and down idle. Here is a quote from something I found on the internet. I think I might have found my problem to be the Engine Coolant Temperature Sensor (ECT):
"How do I pull my OBD (1993-1995) MALF codes?
Diagnostic Port Pinout
The codes are blinked out by the Check Engine Light (CEL) on the instrument cluster. Remove the key from the ignition, pop the hood, find the tniy black box labeled "DIAGNOSTIC" near the stock battery tray location at the driver's side fender. Pop open the lid to the box to find the following pinout in the image to the right. Connect a short jumper wire between the pins STI and GND. Now run as fast as you can and take cover. Just kidding. So now, get comfy in the driver's seat with a pencil & paper, put the key in the ignition and turn it to the "ON" position, but don't start the engine. The CEL will begin pulsing any stored malfunction (MALF) codes on the CEL light. The long pulses represent the tens column digit, the shorter pulses represent the ones column digit. Take the count of each, put them side-by-side and you'll end up with a two-dgit code which, if all goes according to plan, should be listed in the table below:
The codes are listed at this address:
Probe Parts Classic
I did mine and all it came up with is the single digit code # 09
This describes what my car is doing:
"A faulty electrical connection, such as at the sensor wiring contact, will act like an "infinite resistance" as the electrical loop is not complete--this will make the ECU think the coolant is as cold as the lowest it is programmed to read, which is -70 degrees C. A broken sensor will do this as well. The first time I had a problem with the CTS, the dealer put the Tech 1 tool on the car and instantly saw that the CTS was reading -70 degrees---> problem found immediately!! Too bad we do not yet have the home laptop program to interface with the ALDL or you could do this simple diagnosis at home or even on the road!!"
