Did a quick search but since I'm at work I can't be browsing around all day so I figured I'd post up real fast. I have all 4 cylinders misfire codes and 2 random misfire codes. Cars running like trash. Pull off distributor cap and wiped it out and cleaned the metal on the rotor with a wire brush. Still same thing. I found a bulletin on All data that relates to all cylinder misfire codes but it claims the engine won't show any symptoms of misfire. But in my case It's running bad. Anyone ran into this?? Trying to get a solution so I can leave work tonight.

 

See this related thread:

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/99-civic-si-multiple-misfire-2916070/

 

I did everything that you mentioned in that thread.

 

Details?

 

Everything according to all data is fine. Matter of fact the actual Dizzy and Cap look brand new. I just bought this car not to long ago. I've yet to do a compression test. I'm kinda worried the timing has jumped.

 

It's possible... Take off the upper timing cover and feel how loose the belt is... if it's still pretty tight, I would doubt it jumped...

 

What car, engine, mods?

Have you measured the fuel pressure?

If you unplug the primary O2 sensor, does the misfire problem stop?

 

Okay I had to skip a few days on my car due to a few events. I replaced the rotor, pcv valve. Did some looking on my scan tool. And my snap on solus is saying my ECT is out of range. Measuring .7 volts at operating Temp but scan tool said like 160 degrees. Compression test came up with good number. 160 to 170 on all cylinders. The timing is good. All marks are correct with cylinder one at TDC. I will try unplugging the o2 sensor and driving the car tomorrow and get a fuel pressure gauge so I can check that out too.

 

Borrowed a working distributor from another car. Still same problem. Going to mess with other stuff later. Bump for any other suggestions.

 

Checked Fuel Pressure, timing. checked for a clogged converter. Getting spark and fuel. Scan tool is showing O2 sensors doing what they are supposed to be doing. All voltages are normal for MAP sensor and ECT sensor. The only thing I haven't done is try a new ECU but I don't feel like wasting anymore money just to keep having the same problem.