Uhhhhh, it's killing me and making my hangover worse!

Basically, the kit is installed and when we went to turn over the car, it wouldn't start at all with the Greddy ignition harness. We then plugged it in without the harness and it fired up, but with a miss. Apparently, cylinder #4 is not receiving a signal. We're stuck until we can get the consult to look at it, but damn, I'm wondering where they went wrong

This is an authorized Greddy dealer and no matter what, the ecu is not sending a signal to #4. F@ck!

G

 

well... you scared me for a moment. At least its just an ignition/ecu problem. From the topic I thought it was gonna be a blown motor. I am always worried about people wiring the E-Manage wrong.. as in splicing the wrong wires and one of them injectors not getting the extended pulsewidth signal.

Hopefully its just a fried ECU or Ignition Coil. If so... Thats not so bad... it will be all good man!!

 

I'm placing bets on the coil.
Gary

 

From what I understand, the coil is still alive, but the ecu is not sending any info to that specific coil. I hope its not the ecu . . . how much is one of those?

 

Did you leave the car in the dreaded key-on-engine-off position for any length of time? If the car is not running, and the key is on, you'll fry the coils very quickly with the ignition harness.

 

As far as I know, the key was never on except to prime the fluids once the kit was finished. Even then, it wouldn't fire up with the ignition harness. When plugged back into the OEM ecu (no ignition harness plugged into the emanage), the car started, but with a miss.

After trouble shooting for a while, the tech said the coil is fine, but for some reason or another, the ECU is not sending any signal to cylinder #4. We have to take it tomorrow to the dealer to have the consult go over it . . .

G

 

This is exactly what happened to me. I am 100% sure you burned #4 coil. The ecu will stop sending signal to the coil once the coil pack is damaged. Don't go to the dealership just pull the coil pack and you will probably see on one side of the coil pack in the black area it is melted and pushed out a bit. Compare it to a good coil.

 

Well, I just talked to the shop and they said that they tried the coil on another cylinder and it worked . . . I am just soooooo frustrated with this thing at the moment, but I can only wait to see what the dealer says . . .

I now have a 5 cylinder

G

 

So you mean they removed the #4 coil pack and put it on another cycylinder and it worked?

 

That's what they tell me . . .

BTW, would the ECU display some type of check engine light when a cylinder is missing? No lights thus far.

 

Here's more of our convo: they checked the terminals on the ecu with an oscilloscope and found all cylinders were firing except terminal 80 (I think), which is #4. Once the engine idled a bit, the check engine light would flash, they stopped the motor, and when it was fired again, no light remained . . . anyone want to put in their $0.02?

We'll take bets as to what the dealer will say (trying to keep spirits high)

 

The coil pack is blown..trust me. Once the ECU detects it is blown it will stop sending a signal to the defective coil pack.


Word of warning: when the timing harness is connected..NEVER leave the key in the one position for more than 5 seconds. And be careful with turbo timers. If you put the key in on, and just turn the key off, the turbo timer will kick in and "idle" the car in the on position for a minute or more.

 

But what would explain them swapping the #4 to another position and it working?

 

hehe...I don't believe them. It wont be the first time that a mechanic has stretched the truth....I know...I am such a skeptic.

 

Well, I told them that I could rest easier if we could pull each coil to inspect them? We pulled every coil and even pulled a coil off another Z and put it on cylinder #4 (middle, driver side coil). Still nothing.

My ecu is not sending anything out of pin 80, so I got stuck with ordering another ecu (can't explain how pissed off I am).

Any one have any other suggestions? I can't imagine just one pin out of the whole computer going out. I could see frying a whole computer, but that's not the case. The computer is showing "misfire" and of course, we know its pin 80 cylinder 4. Someone shoot me!

 

How about an update?

 

5 hours later . . . *chirp, chirp from the crickets*

I'm waiting on the replacement ecu that should arrive on Thursday. Am I the only person lucky enough to have an ecu go out during their TT install? Once I get the ecu in, I'll just plug in the harnesses (not the ignition one--costly mistake for me) and see where we're at . . . until then, I'm driving my girlfriends's Nissan Armada. It's sweeeeet . . . but guzzles gas like I drink beer

G

 

Acually when you get into small electronics like that it is pretty easy to screw up one pin like that. Thing is it takes a technician with some serious skills and some pretty hard to get tools to fix. I'm a mainframe computer technician in the Navy and I'm not sure I could fix thatif it was anymore than a pushed pin.

I can fix the crap out of TV's VCRs and basic Fuel Injections though

 

I'm willing to bet it's your wiring harness.

 

Well, we checked everything at the ecu and pin 80 doesn't have anything . . . oh well, **** happens. I'm just glad our ecm isn't very expensive ($600) . . . could've been worse.