ok so i have a 95 si with a h22a in it. The car has run fine for 3 years all of the sudden it started missing. I have all ready changed out the plugs, distributor cap rotor button, fuel filter, and air filter.

fuel pressure was kind of high so i turned it down to around 35 vacuum on 42 vacuum off. It was around 40 to 48 before and has been running like that fine for around a year now.

It has the distributor and coil from the si. Thats how its been since i had the motor installed like 3 years ago. Im getting a new set of plug wires soon they are like 3 years old. any clue as to what the problem is before i spend any more money?

 

Like missing on one cylinder every now and then, or running rough all the time or what? More details!

 

it all the cylinders i think. it started a month ago started missing once in a while. while driving. Changed a few parts drove fine for a week. did it again. This time it missed so bad it was hardly going. Then few hours later magically cleared up and worked fine for another week. Now when idling it misses like every 10 seconds or so.

 

It sounds like an electrical issue, but I could be wrong. You might double check your plug wire connections to start with, then maybe check the ignitor and coil and their connections. Do you get any check engine lights?

 

i changed the plugs 2 weeks ago and then again yesterday. yesterday they had carbon build up on them and a redish tint on the white part.

 

no cel's, i checked the plug connections they are good, i know where the coil is but where is the igniter?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by darkd1gt &raquo;</TD></TR><TR><TD CLASS="quote">no cel's, i checked the plug connections they are good, i know where the coil is but where is the igniter?</TD></TR></TABLE>

Inside the distributor, they commonly go out but usually the car won't run without it. It looks like a little black computer part...(also called ICM )

 

Sounds a lot like a failing ICM to me, they can go out bit by bit.

 

yeah i just went to walmart and got a multi meter thanks for the help so far

 

yeah i went and checked it the black yellow and green wire had voltage. and the blue and yellow green didn't have any voltage and according to this online guide it says i need a new igniter. that sound about right ?

 

Yep, sounds like an ignitor/ICM would do it.

 

cool thanks for the help guys ill let u know how it turns out

 

well that didnt do the job....any other suggestions

 

well, is it all the cylinders misfiring or not? if its only one cylinder its probably a injector if you already replaced everything. if its all of them id check to see if your timing is still on from the cam gears.

 

yeah timing is still on. i assume its all the cylinders misfiring because all the plugs were fouled.

 

before i get into it, when you say your car is misfiring. because you feel it, or because you got a CEL and checked it?

 

because i can hear it and it cut off on my girlfriend the other day in traffic. ive had cars misfire on me before and i know how it feels and sounds as well.

 

hmm, what RPM does it idle at?

 

and why would the plugs be covered with carbon build up after 2 weeks.

 

car idles at 650 700 its easier to hear the misfire when it first cranks up when its fast ideling

 

i dont really understand how you hear a misfire. maybe feel it but not hear it. or maybe i just have bad ears. i dont know

 

Check your ECT sensor connection. My civic did this a while back but I did had a code 6.

 

found the problem plug wires. cleaned it right up.

 

although i think the fuel and the igniter were off as well thanks for the input guys.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bluedlude &raquo;</TD></TR><TR><TD CLASS="quote">i dont really understand how you hear a misfire. maybe feel it but not hear it. or maybe i just have bad ears. i dont know </TD></TR></TABLE>

It will just sound like a blip in the hum of the engine.