I been having this problem for a month now and finally I came on to here. I have been chasing this issue and have replaced TFI module, distributor+cap, plug wires, coil, injectors, fuel pressure regulator, high pressure fuel pump, air idle sensor, MAP sensor, throttle position sensor, coolant temp sensor, new relays, re-timed the entire engine to 12 degrees. And I’m still getting a misfire on cylinder 1 according to my code reader. Any suggestions or does anyone know it does have 155lbs of compression. Hopefully you guys will know because my wallet is hurting from this BS lol.

 

What do the other 5 cylinders have for compression ?

A misfire just means that cylinder isn't producing as much power as expected.

 

All the other ones are good as well right at 155-160lbs

 

maybe try and switch injector 1 with 4 or ? just an idea