91 honda civic won't start but there are no error codes. It cranks and puffs, but no start. Started intermitenly running like crap over the summer. Would act like it was missing, then it would run fine for a time, then run like crap again. Would also not start on occasion after running it then trying to restart it. Getting spark, getting fuel. I am lost!

Replace the Ignition Control Module (ICM) and coil:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

Starter/ignition switch

Could water be in gas tank?. try gas treatment... make sure gas in car too lol

Check plug wires<- very important... if you do have to replace them make sure you replace plugs AND WIRES

Check battery to make sure no corrosion... does battery have enuf juice?

Does the civic have EFI? Or catalytic converter?

Check all fuses and relay's to make sure all are in working order