Hi,
I have a 1995 Del Sol Si (stock 1.6l, SOHC) that cranks fine and sounds fine but rarely fires and never enough to start. It ran fine before it stopped running while driving. Here is what I have done. Initial spark check led me to believe I may have bad cables. Replace all cables and plugs but no change. Checked the spark again while cranking and all 4 spark. Checked fuel pressure with key in on and got 38psi. Check compression, 150, 60,120 and 120. One pretty bad and two a bit low but it does not seem to be enough to not start. Read the codes (counted engine light flashing and got 6 (water temp), 10 (air intake temp and 21 (spool solenoid). Both temp senors read about 2K ohms bot into the senor and into the ECU (with the connector removed). Not sure what to do next. Distributor was replaced about 2 years ago. Timing belt replace at 113K miles. Now has 155K. Thanks for any suggestions.

 

Check the starter relay located under the dash many times the soldier joints will have tiny cracks inside and depending on temp it may or may not start...

​​​​lastly the electrolytic capacitors in the ECU leak or dry out...