cylinder problem

[4BangerV8Killer]

one of my cylinders isnt fireing so i did everything short of a compression test. My plugs were oily so i think a seal is bad if that true would that cause a cylinder to no fire?

 

[kaslasma]

Are you sure its just one cylinder not firing? I would definatly invest in some new plugs, also find where your oil is coming from becuase that could potiental be dangerous. If the new plugs dont fix your problem and / or your car is really only firing two of your plugs I would also check the Coil Pack and Power Transistor. Once you have done all that if there is still a problem there are a couple of other parts to check.

 

[4BangerV8Killer]

ok so far i have changed the plugs twics, changed the injectors, wires, and checked spark on the valve cover.

 

[kaslasma]

Ok so you know which wire is not getting spark correct? And if you have changed the plugs and wires, swapped them around etc and still no difference, check the other wire that is on that same coil pack. Still no help, check the coil pack, then the power transistor. I see you have a 90, I also have a 90 and the parts will be a little hard to come by. Do you know how to test both of those?

 

[4BangerV8Killer]

no i dont know how to test those two things but the thing is. i dont think its those because the story is my buddy took out my car when i was drunk and drove it really hard. either it was just bad coincidence or its what i think and its a big problem.

 

[kaslasma]

I'm not saying that it is either of those, I know I beat the SH!T out of my cars. I also know that there are only so many items that are part of the ignition system. If you aren't getting spark on a particular wire, then whats the source of the spark in the first place? See what I'm saying, start at the end and work your way back. The eletrical impulse is sent from the Coil Pack, so test to see if that is good. <You'll need an Ohm meter for that> Pick up a haynes manual and it will tell you the exact procedure and values. If that is good then go back another step and check the power transistor. Then check the ECU. One of the items in the process of firing a spark has to be not working properly otherwise it would work, see what I'm saying? Does your tach act funcky, dip down when in throttle? I know how the troubles are with firing, I recently had a problem with my 90, it would only fire 2 plugs but I could stand on it and it would start firing all 4 again running normal. Then it would run fine drop to 2 and then run fine again. It ended up being the power transistor. Also is your car throwing a CEL?

 

[4BangerV8Killer]

all my wires are putting out spark!! i said that before i think it either an air or fuel problem. i already changed the injectors and cleaned the terminals on the injector wires. (the electrical part)

 

[kaslasma]

Oh I'm sorry I assumed it was a spark related. I know your first post says you have not checked compression yet, maybe you should do that. Then maybe try checking if voltage is getting to the injector, if it is swap injectors and see if its the injector. If it was an air problem I think you would be having it elsewhere unless it was something like a bent valve but you should hear that. Man I'm sorry I was "assuming" it was spark related.

 

[4BangerV8Killer]

no no haha im not mad or nething but ya i did the injector thing i checked the voltage and cleaned the terminals and swaped all the injectors. and what does it sound like if the valve is bent? and its the third from the left which i believe is our weakest cylinder (runs the leanest). that cylinder doesnt fire and the plug always gets oil on the tip both times i changed the plugs there were covered in oil.

 

[4BangerV8Killer]

so what size socket do i need to taKE out the plugs? im to lazy to go look