i am getting a misfire code on all four cylinders. the car is a 98 ej8. plugs and wires are ngk and under a year old, and just replaced the factory coil. 02 sensor is about a month old. the car has approx. 140,000 miles on it. what could it possibly be, or is it just that i have a stage 2 crower cam?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ridin98civic &raquo;</TD></TR><TR><TD CLASS="quote">i am getting a misfire code on all four cylinders. the car is a 98 ej8. plugs and wires are ngk and under a year old, and just replaced the factory coil. </TD></TR></TABLE>

When you changed your factory coil, did you unplug your plug wires from your dizzy cap? And if so, did you make sure you put them back on in the proper order so they would be firing correctly?

Cylinder 1 on your left... cylinder 4 on your right
looking at the dizzy from passenger side:
4 2
3 1

 

yes i did, it most likely wouldnt even run if that was the case. it runs fine the CEL just comes on. and i have reset the ECU since installing the coil. the coil was an attempt at fixing this misfire problem. anything else?

 

bump

 

you pretty much answered your own question.. do you have an aftermarket cam gear? what is your cam timing at? Ignition timing? My guess is after your tuned your CEL will go away

 

is your firing order correct? it may be off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ridin98civic &raquo;</TD></TR><TR><TD CLASS="quote">yes i did, it most likely wouldnt even run if that was the case. it runs fine the CEL just comes on. and i have reset the ECU since installing the coil. the coil was an attempt at fixing this misfire problem. anything else?</TD></TR></TABLE>

I agree that it may not even run but if 2 cylinders were correctly wired and 2 were swapped, 2 functional cylinders would be enough to keep the engine going but you would be able to hear it distinctly. You said a CEL on all 4 cylinders so rule that out.

It's highly possible that your timing is just off. An aggressive aftermarket cam could make for a rough idle, but shouldn't cause misfire CELs to be thrown.

When did you start seeing the CELs and was there any coincidence with anything just installed?

 

starting getting one for just cyl 3 shortly after having the cam installed. i have no aftermarket gear and crower said that at stock timing the cam would be correct. i have replaced the plugs and wires within the past year and the new coil a week ago. the only things coinciding with the CEL would be a header (which is no longer on my car, got a new one) and the cam. maybe timing got messed up somehow? would that cause this?

 

indeed it would.. if you have a timing light or have access to one, reset your ignition timing and the ecu

 

i do in fact have access to one. could i try and correct it by advancing/retarding the dizzy? or would it be best to take it off and put it back on with cyl one at top dead center or whatever it is.

 

it doesnt matter, im not sure if you know this but you correct ignition timing by turning the dizzy while the engine is running and at operating temp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdeemseerx &raquo;</TD></TR><TR><TD CLASS="quote">it doesnt matter, im not sure if you know this but you correct ignition timing by turning the dizzy while the engine is running and at operating temp. </TD></TR></TABLE>

knew that but didnt know to what degree i could advance/retard

 

how do u reset ignition timing? im mis firing on all cylinders also..

 

you would use a timing light to properly "set" the timing and then would need to "reset" the ecu by either pulling the fuses for a few minutes or disconnecting ground for a few minutes(better have your radio stations memorized, lol)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ridin98civic &raquo;</TD></TR><TR><TD CLASS="quote">starting getting one for just cyl 3 shortly after having the cam installed. i have no aftermarket gear and crower said that at stock timing the cam would be correct. i have replaced the plugs and wires within the past year and the new coil a week ago. the only things coinciding with the CEL would be a header (which is no longer on my car, got a new one) and the cam. maybe timing got messed up somehow? would that cause this?</TD></TR></TABLE>

It's highly possible that when the cam was installed your timing belt was put back onto the cam gear lined up on the wrong teeth, so that would account for incorrect timing. Was timing checked after the install?

 

when the cam was installed the cam, timing belt, water pump were all changed so im assuming it was, but never checked myself.

 

Double check that to be sure.

 

thanks for all the help, funny thing is the CEL went away now, i dont know what is goin on, but i will check the timing

 

did you change or clean the distributor cap, carbon tracking can be your problem

 

i checked all the contact points and the rotor when changing the coil and they all appeared as clean as a hospital floor

 

your exhaust valves might be too tight dude. have a look at them.

 

thanks yea theres a few things i need to check evidently