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Major Problem. Need Help Please. I'm Stumped =[

Michaelove

By Michaelove,
in Engines & Forced Induction

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Michaelove Contributor

Michaelove

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Posted

To start off, it's an RB25DET with a bigger t3/t4 turbo, z32 MAF, power FC, and lots more.

Okay i'll start from before things screwed up.

I had fixed all the major problems. I siliconed the coil packs and they stopped arcing. My car was running great. I was still on the stock ECU until about 2 days ago when my Power FC finally came in. I put that in 2 days ago and the car was running even better, just really rich. I had been driving it around, being really careful to not get on it because the Power FC was not tuned yet and still has not been tuned.

Anyway, I drive my car to my girlfriends house last night, the car is running great. I slept there, wake up in the morning and go home, the car was still running great. I thought i might have had a small vacuum leak so I got some starter fluid and sprayed it around the intake manifold. Around the injectors sort of, all around there. I hardly sprayed any. I turned my car off and turned it back on a little bit after and while it was idling I was looking through my commander for my Power FC, through the injector part of it. A little later I noticed that my car was idling funny, like it was missing a lot. So I gave it some gas and almost nothing changed. It started popping and running really really bad and it could hardly hold it's idle. I could not get the car past 1500 RPM even if I gave it full throttle. It was running SUPER rich.

So I got out of the car and pulled each coil pack wire off one by one to see which cylinders were missing and what not. I pulled the first 5 out and nothing changed when I pulled any of them out.

I then decided to reset the Power FC ECU to see if I messed something up with Power FC for it to be doing this. I reset it, let it learn and all that. I let it idle for 30 minutes. I came back out, reved it up, and the exact same thing happened. Nothing changed at all.

I then decided to put my old RB25 ECU back in and that made things a little better. I could rev it to redline in idle and it was holding it's idle fine but it was still missing. So I tried disconnecting coil packs again and I found that the number 1 coil pack did nothing when I unplugged it, but the others did change something, the idle dropped everytime I pulled those out so I knew they were fine. So I went to swap the coil packs from cylinder 1 to 2 and 2 to 1 to see if it was the coil pack that was bad. I got in my car to start it up and.....it just turned over and turned over and turned over. I can't even get it to start now. I tried plugging power FC back in and it wouldn't start with that either. So I figured that I was flooded and gave it a bit before I tried cranking again but it still didn't start up. So I had a friend hold the coil pack next to the block but it didn't arc out so I don't think i'm getting spark now.

I'm letting the car sit over night to see if it was flooded or what.

What could be wrong!? Any ideas or help will be greatly appriciated! Thanks in advance

Michaelove Contributor

Michaelove

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Posted (edited)
Check your plugs, if was running rich they take no time at all to foul up, then they will run like crap.

They're black, really black. Could they really cause the car to not start that quick? I ran those plugs with my car running rich for almost 2 days. You think they could just stop working like that?

Edited by Michaelove
Michaelove Contributor

Michaelove

Posted
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Absolutly, have had the same problem myself, change the plugs with some old ones i had here and purred like a kitten.

but when I crank it and hold a coil to the block it doesn't arc out. That means i'm not getting spark, correct?

GeeTR Grand Master

GeeTR

Posted
Posted
but when I crank it and hold a coil to the block it doesn't arc out. That means i'm not getting spark, correct?

As long as its not arcing out somewhere else that you cant see, then yah, correct.

Swap the coil with one from another cyl and check results.

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