My car is a 1999 Civic HX with 98k on the clock, and is currently throwing the following codes

[ul][*]P0301 Cylinder 1 misfire detected[*]P0302 Cylinder 2 misfire detected[*]P0303 Cylinder 3 misfire detected[*]P0304 Cylinder 4 misfire detected[*]P0300 Random/Mustiple misfire detected[*]P1399 Manufacturer Contrl Ignition System or misfire [/ul]

Steps I've already taken:
[ol][*]Replaced all plugs[*]Replaced cap and rotor[*]Replaced all wires[/ol]
CEL still came back and I'm looking for some guidance as to what I should take as my next step.


TIA!

 

OK, so the other night I took two additional steps to try and solve this issue. I ran a pint of Sea Foam through the system just in case it was an issue with a clogged injector or something. Then I set my timing, which was just about spot on (retarded 1*).

I went out and drove her for about 15 miles or so and the CEL came back on...this time it was only P1399(Manufacturer Control Ignition System or Misfire). Anyone else run into similar issues?

 

Did you get the wires back on in the correct firing order? Double check. Make sure you have fire in all cylinders. Maybe your distributor going bad. What does the manual say to check for those codes?

 

Oh yea, wires are in correct order for sure. Manual, I don't have one for the Civic....just been relyin on the intraweb

 

i did the same maintain, but only got a misfire on number 4. then i cleared the code, restart the engine, it s all good.
you must have done sumthing wrong.

 

That's true. Did you try to clear the code?

 

Yes, I've cleared codes after each individual step and re-read the codes after CEL came back on.

 

So after resetting the codes this AM, and doing about 60 miles to/from work plus a trip to lunch I get the flashing CEL again on the way home. I check codes and it is P0301, P0303, P1399 (misfire cyl 1 and 3 + Mfg misfire code). I get home 2nd guessing myslef about the wire order on the distributor, so I pop the hood and confirm that all wires are in correct order.

 

Just a question....how do honda's read misfires? Just curious because my car runs and idles like butter it's just the CEL that is giving me grief.