Rough Idle, Really Rough Acceleration and More. HELP!
 

So last night I drove out to a buddys house to pick up some stuff. I popped the hood and he was lookin around at the car. I reved up the motor just enough for the blow off to go. Then we started talking and the idle started fluctuating by a few hundred rpms. Up and down over and over again. I figured it was just my emu being a pos again and left. As soon as I pulled out of the driveway the car ran like sh!t. Barely puttered to 2000 rpms. I pulled over and it eventually died. No vaccuum leaks I could see/hear. I checked the ecu for codes and it gave me crank pos sensor, ignition signal primary, and the evap code I always have. I changed the crank and cam sensors and the idle changed slightly. I also disconnected the emu ignition wires, since the emu is a broken pos and has a mind of its own. I now have no codes. I changed the MAF and no difference. All my couplers are nice and tight. Fuel pressure is normal. The exhaust smells like raw gas. I tried unplugging one coil pack while it was running. No matter which one I pulled, it made almost no difference in the idle, but when I pulled 2 it makes a huge difference. I am at a loss about this and Im worried I might have lost a cylinder. Mods can be found here http://forums.maxima.org/supercharge...d-4-5-gen.html Someone please help me!
Zack

damn zack, i was going to say that maybe you had a vaccum leak someplace.

Honestly, this just happened to me. It turned out being crap injectors.

Had all the symptoms you had, crap idle, shiity accel./driving. I even unplugged 2 Coils and same thing you said. I swapped in stock injectors and it worked fine. Good luck

Im gonna be really mad if my brand new injectors are crap. Ill try that and let yall know

Did you end up buying new injectors? What did you end up doing?

Well its definitely not the injectors, I swapped them and no difference. I noticed one of the plugs was soaked in fuel and the rest were dry. I triple checked and there is definitely no vacuum leakes. Hopefully it is just a coil pack, but I wont know until tomorrow. If anyone else has an idea, please throw it out there.
Zack

I bought a new set of 440's and everythings good...

It was a bad coil pack. Oddly this one was firing...but very weakly...enough not give a CEL, but bad enough to screw with the idle. We tested all 6 on my 5.5gen and found the problem child. It's interesting because on my car, it was slightly noticeable in the idle, but on his car, it was clearly noticeable.

S