Hondaiii3

I got a 98 civic and is misfiring from all 4 cylinders it has new spark plugs, wire, distributor cap, i change a bad fuel injector i forgot to change the rotor cap if i change it and it keep, can it be the Distributor ? Need help

joeshmo

Is it just throwing codes 300-304? Any other odd behavior? Does it misfire at idle, under acceleration or just when under load? My engine ran rough as hell and misfired like crazy due to my fuel filter being plugged up. Oh yes, since you said you replaced the wires and cap, are you sure they are in the proper order?

Hondaiii3

the idle is perfect is right were it needs to be.. when i start it up and let it run and warm up its start to misfire when i drive it, it misfires a little then my check engine light starts to flash none stop and then its starts to misfiring more..

joeshmo

So no misfires at idle. When you drive with the engine not at operating temp, no misfires then as well?

Hondaiii3

yeah it does misfires at high idles some of the times.. when the check engine starts to flash none stop thats when it misfires even more.. can it be thats no getting to much spark ?

joeshmo

It could be. Warm the car up to the point where it begins to misfire, turn off the engine and check the spark. Could be something as simple as bad sparkplug wires or your coil could be going.

Former User

Replace the fuel filter and rotor.

Resistance test the coil and have an auto parts store test the ICM.

You will destroy the cat ($$$) if you continue to drive when the CEL blinks.
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Also, please place simple tech descriptions and questions directly into the thread title.

joeshmo

Truth on the cat thing, my CEL clicks on constantly for code 0420 since I drove while the engine was misfiring. Luckily, I just passed inspection.

Hondaiii3

alright.. im just kind of lost because i got someone telling me that it could be the rotor cap, and i got someone else telling me that its the distributor.. when i start it up it starts perfect, but you can hear that its misfiring right away ones you turn it on and the idle its good its not low or anything..

joeshmo

Well then check into your distributor. The rotor is PART of the distributor, as is the cap. The rotor and cap go bad much more frequently than the entire distributor. The problem with misfires is they are often difficult to diagnose and people end up replacing every part that could cause the problem until they find the right one.

Hondaiii3

alright thanks a lot I'm going to change the rotor and see what happens.. i took it to a auto part store and the only thing the guy told me that is misfiring form all cylinder that all he did int give me any codes or anything.. Thanks A lot ill see what happens..

joeshmo

The missfire codes are 300-304 (one for each cylinder.) You gotta have them check your ICM at the autoparts store as well. And check the coil, for sure.

HondaPartsHero

Could be a variety of things. Do as Ronj and the others says fuel filter, rotor and check out the coil/ignitor. Also what is the mileage on the vehicle? Ever had a valve adjustment.

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