Rough Idle problem

[S13FASTBACKSR]

I meant I took the coil pack off the plug for the #2 cylinder and hooked it to the plug on the #1 cylinder and it still didn't fire.

ya i know thats what i meant too lol..anyways yes it does sound odd that your ground wire is reading like that..it is suspicious..also the ecu is very suspicious if you ask me...what we do know is its not your coilpacks since you switched them...if it were my car and i was sure it was nothing else such as the maf, o2 sensor, tps, iacv, timing , vac/boost leaks i would probably buy a ecu first...

also one more thing..did you check voltage and continuity of your ignitor?

[streetspirit7]

if it were my car and i was sure it was nothing else such as the maf, o2 sensor, tps, iacv, timing , vac/boost leaks i would probably buy a ecu first...

But would any of those problems cause it to not spark on one cylinder?

I've suspected the ECU since I got it. I was kind of pissed I ended up with a remanufactured one since I went with the more expensive Phase2motortrend company. I also got a siezed turbo on it.

[S13FASTBACKSR]

bro im sorry man your right those things wouldnt cause you to not have spark..accept maybe the ignitor...i get on here usually only late at night and im so tired..i forgot you said you werent getting spark..but also your fuel injector not working would cause your to not get spark so just smell the spark plug to see if it smells like fuel..also how did you test to find out you werent getting spark?

[streetspirit7]

I pulled the coil pack out (still plugged to the harness) with the car running and put another plug I had in it and there was no spark. I did the same thing with the coil pack from the #2 cylinder and I got the sh** shocked out of me. lol

hehe, it's cool, I've done worse when I'm tired. I havn't had a chance to do it yet but I'll check the fuel injector probably Thursday. By the way, I appreciate all your help.

[S13FASTBACKSR]

no problem bro i love to help and i will keep helping you until you get your car running how it should...if your cylinder isnt firing then its because you either dont have fuel or you dont have spark..that coilpack is very suspicious as far as how the voltage checked out..but that may not have anything to do with the wiring it may be the ecu

here are what i think the problems could be...it is still possible it is your wiring so just check over your wire harness and make sure you connected all of the grounds..but like i said i think its more of a possiblity its your ecu..also check your ignitor for voltage and continuity...like i said your fuel injector...

...you can pretty much eliminate 3 out of those 4 things by doing simple tests...just follow your wire harness from coilpack one back and check your grounds..wouldnt hurt to check for continuity throughout it too...and you know how to use a multi meter for your ignitor and i already told you how to test your fuel injector..if we eliminate all of those then i think it would be safe to say its your ecu

[streetspirit7]

Sorry I havn't been back on here in a while, i had a computer melt down. How do I check the ignitor chip?

[S13FASTBACKSR]

check continuity and voltage with the key on

[streetspirit7]

So have the igniter plugged in on the ecu side and test voltage on the unplugged coil pack side? What should the readings be? What 2 points do I check continuity between?

[S13FASTBACKSR]

to check continuity of your ignitor you unplug one side of the ignitor and put the positive needle on the power pin of the ignitor and the negative needle on a ground..do the same to the other side of the ignitor when you unplug it...test the voltage of the ignitor too...do the same to the coilpack clip...also i dont know what the readings should be..as long as you are getting voltage you should be fine...as far as continuity you will here the beep if there is continuity

[streetspirit7]

I think i'm doing somthing wrong. I have the key on and I'm not reading voltage on any of the pins on the ignitor. I also can't get continuity on any of them the way you told me to as well.

[S13FASTBACKSR]

try checking continuity and voltage with the engine running and the needle in the wire..have you tried testing voltage and continuity on other components to see if you are doing it wrong? do those 2 things if nothing then your ignitor is probably bad

[streetspirit7]

Well, it's been about three months, but I finally got the Sr running properly. It turned out to be a break in the signal wire some where between the ignitor chip and the coil pack sub harness. I appreciate all the help S13FASTBACKSR.

[S13FASTBACKSR]

glad to hear it bro!!! your welcome btw..but im sorry i couldnt nail it on the head for you