Code 43 89 Cutlass Ciera

'89 Olds Cutlass Ciera 2.6 L 6 cyl. Car runs for 10-15 min. and stalls, won't restart for about 1/2 hour. Code relates to about 10 parts that I haven't addressed. I have replaced computer chip, O2 sensor, crank angle sensor, EGR valve and gaskets. How can I narrow down what could be wrong with it? Code definition is "Electronic Spark Control".
I doubt that code has anything to do with your problem. Your just going to have to go back to basics.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be test during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.



Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.


2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.


3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.


4) If all other tests are passed. then perform a complete compression test and record the results. All cylinders should be over 120lbs in most cases and all be within 10% of each other.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.