background: i dd a 92 240sx with the original ka. bought it with 104k miles now it has 173k miles. Earlier this year, i noticed that SOMETIMES my car had a trouble starting up. It misfires/sluggish the first 3 seconds of startup and then idles normally (~800rpm) and the engine check light appeared. I thought i might be leaking fuel so i decided that i was going to replace the o-rings on the fuel injectors. Never got to replacing it because of the busy school schedule. The car runs perfectly and i noticed that this problem only appears during cold start.

After coming from a 5 day vacation last month, i started my car and the misfiring was still present and i figured to check which cylinder was out. The problem appeared to be on cylinder 3 where there were no changes in the rough idle after i pulled the #3 plug wires.

I checked the ecu and came out to be code 35 (weird) which was the code for the egr i believe..(but how would the egr affect the #3 cylinder?). I cleaned the egr and reset the ecu but the problem was still present.

This time, i check if my injectors were functioning correctly. Again, #3 injector was out so i replaced it with a rebuilt injector. Started up the car again, and cylinder 3 was still out...I then tried to check for compression on all cylinders and got 180,185,180,180. I dont understand what is happening and is frustrating me.

I replaced numerous parts already (new plug wires, new oem spark plugs, rebuilt distributor cap)and i am still getting a dead #3 cylinder.






cliff notes:
misfires on #3 cylinder
checked fuel injector: #3 was bad. removed and replaced, now all injectors work fine
checked compression: ~180 across the board
replaced plug, wires, cap




any ideas?:aw: