Burned 2 coils last week...now what's wrong?
 

Background info. Greddy TT, 9psi, aam fuel return, Emanage Ultimate,etc

Been having small problems but last week I burned 2 coils (so only 4 cylinders were working and you could hear and tell it wasn't running on all 6).
Well, they replaced the coils and it ran perfect for a few days til today. Drove to school, took the key out, let the turbo timer do it's thing and the car died before the timer shut off. Weird, tried starting it up again and wouldn't turn over. Waited a minute, finally turned on but sounded like it wasn't running on all 6 cylinders AGAIN! Also, there was a bit of smoke coming out the passenger side engine bay and white/blueish smoke out the exhaust for a bit. So I immediately thought it was another coil but they all looked fine (no bubbles on the sides). HMM, drove down to GT Motorsports with practically no engine power and I swear to you halfway there it magically had power as if NOTHING EVER happened. Now, I'm confused as hell and I know there is something wrong but I have no clue what it could be?
Is another coil about to go out and this is a sign? WTF was the smoke coming out my engine bay too? My guess is the wiring but SAM at GTM said if it was the wiring it would throw a bunch of codes.
This is my daily driver and as I'm trying to save up for a daily driver, I can't if I have to keep spending money to fix this one.

Can someone give me some ideas/suggestions? (hopefully sharif can chime in too)


Thanks

put diodes in line with the coils, EU is known for blowing out coilpacks.

I just talked to greddy and they said with their ignition harness you need those diodes, where do yu get those, how do you install them and which ones to get???

Diodes arent needed.

Becuase you blew out coils, and than had this sporadic coil outage, I am thinking this sounds like a wiring/short problem. Sam will get to the bottom of it. :)

Side note I have coils cheap if you need em.

Sharif I shot you an IM on AIM 4 mins ago, wanted to ask you a few questions, if you can please respond

I am not on the office puter.....but AOL is still on.

Shoot me a PM if you have a question for me after hours.

We have done many Eu installs, and have had the same problem. It's the turbo timer! don't know why, but it's the turbo timer, disconect it and you'll see.

Interesting. I havent run a turbo timer on the EU, and I havent burned any coils.

Fito, were you able to determine how wiring the turbo timer resulted in the burned coils? The engine is still running, so the ECU thinks nothing different.

I did run a turbo timer with the EU and I never burnt coils. I burned my first coil after installing the FCON.:( Not because of the install. The dyno operator was trying to get an rpm signal and tapped the coil harness and something shorted.

Yes please elaborate, we have one do the same thing even caused errors with the EU.

hmm I was actually going to post asking if it's the turbo timer with it leaving the system on, but then figured I don't know enough to really guess

That's what I suggested to Sam but he's telling me otherwise. I guess it could really be anything though. I never keep the key in the ignition w/o the car on too except when the TTimer is goin off (but still the ignition is on so I don't see a problem here). It's just random/weird how 2 coils could go while it's idling. I also have the constant SES light on but Sam said he may have found a solution.
Anyone know why it would run off not all the cylinders and magically run back on all 6 again? That's what's really weird and it's not the first time it has happened. About a week before the 2 coils went out it did the same thing for a few minutes but went away after I shut it down.

Thanks guys.

TTT. Car is still at GT trying to figure out what's wrong. I'm scared that everything is going to run fine when I pick it up and the moment I drive away it's gonna burn up another coil or damage something else. The smoke coming out the engine was NOT good and I'm sure something was damaged in the process. I never had this problem with the Emanage blue (no additional harnesses though). What if they don't find out what the smoke was and it just comes back to me with the same prob?
Keep you guys updated.

I still say try using some diodes. I've had a few local friends with Z's fry coilpacks on EUs without diodes. As soon as they threw 'em in, no problems. And none of them are running timers.

the EU/e blue frying coilpacks is somewhat common on nissans for some reason.

Sam was telling me that the EU doesn't have a setting for the coil packs either. So it's not like you can adjust the voltage or wtvr on them. I might just have to put them in for the hell of it and try it out kuz this is getting ridiculous! So chinmike, you personally know people that have fried coils with EU even when the wiring was done correctly? They added diodes and everything was ok after that?

yep. I know a Z owner and also a G35 owner. the Z owner ran a vortech SC, swapped to eu, fried about 6 coilpacks, got tired of it, then went back to the SS box (this was before the diode thing became known). the G35 owner is a greddy TT kit. He killed a few coilpacks, threw in the diodes, and I haven't heard him mention a problem since.

I can find out this week though if it's happened recently.

If you could find out I'd really appreciate it a lot. If they haven't burned up anymore since then, then it might be safe to just add the diodes anyways. Only problem is convincing Sam that it could be there's no diodes in there and getting him to solder in the diodes for me.
It's weird how some people on the EM blue/EU have burned them up while others on them w/ no diodes at all have had success.
Thanks

chimmike, are you sure your guys didnt have the only blue emanage installed? The diode trick has been around for years with the eManage blue. I spoke to Sam, and told him that if the wiring is all good, to go ahead and install some diodes. Diodes will slightly drop the forward voltage, and is usually enough to protect the coils.

didode pn#

http://www.datavibe.net/~etx/z33_ignition%20install.pdf