whats up honda tech!! I have a jdm itr in my eg. its been in for about a year now with no problems. The other day i started it and it had a horrible misfire at idle and up in the rpms. NO CEL EITHER!!! This is what i did so far>>>>>>>

I replace the plugs because they didnt look too health.
i swapped plug wires with known good ones.
i swapped map sensor with known good one.
i disconnected iacv and it still had misfire.(held foot on gas to keep it running)
i recently did tune up so i just check inside dizzy for moisture which it had none.
I added fuel injector cleaner to tank.
Tomorrow i am going to swap tps , replace fuel filter(its almost time for it anyway) and a fuel injector / combustion chamber cleaning at work..

If all that fails im thinking it is my dizzy.. anybody have any ideas of what could be wrong or anything i missed??

thanks

 

anyone????????????????????

 

I was going to say wires not properly seated, but you've replaced them. With my car, I ran a MSD cap, but the wires after about 5-6 moths later would blow off. Got tired of that and went back to stock cap. misfiring is almost always electrical. Even if it is a bad injector, they are ran electronically.

 

rotor inside distibutor can be worn.

 

Check your spark at all four wires. Either buy a spark tester or:

Disable the fuel injectors and get a new or known good spark plug. Set the gap of this plug to your vehicle's specifications and make sure it is clean afterward. Wear gloves (welding gloves work great), preferably with latex or nitrile gloves underneath, and remove a spark plug wire from its plug. Connect the good plug to the end of the wire and hold the plastic deep-well tube at the very tip of the wire end with the threads of the plug touching bare metal on the valve cover. Have an assistant crank the motor while you watch the spark, carefully keeping all body parts away from the plug, motor and car body. Different types of plugs have different colored sparks but usually a good spark is a thick, strong flow of bright pink or is at least bright. Little blue or pink "lightning bolts" indicate a weak ignition. Check all four wires. If the sparks at all of the wires are weak, try holding the threads of the plug against the battery negative post to see if the better ground makes a stronger spark. This will test your entire ignition.

You follow a similar procedure when using a spark tester.

 

thanks everyone who tried to help...........turns out it was bad fuel... i always go to the same shell station near my house never had a problem till now.. i put lucas fuel system cleaner in it / filled the tank with known good fuel and i also cleaned my injectors at work today.. no problems now, everything is good

thanks again