98 civic. Codes po302
Po141
P1399
Changed coil injectors r workin
Any ideas

 

Reset ECU. Do all codes repeat?

 

P0302 and P1399 are misfire codes. P0141 is an O2 sensor heater circuit malfunction.

Like RonJ said, reset the ECU, see what codes come back. If you don't feel a miss, P0302 and P1399 should go away with the reset. P0141 could be either a wiring problem, or a fault with the O2 sensor. NGK has a how-to for testing the O2 sensor on their website, here

 

Did reset and codes still same car is missing, shakes at idle., at first would not start,
replaced coil, now starts, runs like crap, tested objectors all got fuek

 

White spark at cyl2 spark plug?

 

Get a spark tester from your local parts store, and follow the instructions on it to test each wire individually.

 

It was nothing more than plugs n plug wires runs like a top