jaggermouth

iTrader: (1)

So I posted this question in the 3rd gen section a few months ago but didn't get anywhere in the long run so I thought it might get resolved in here.
My problem is when I started the car this morning, it ran great, rev'd, and held a good idle and even got up to temperature. I needed to calibrate my WB02 so I shut the car off and took the sensor out and calibrated it. Turned the car back on and it ran only on one rotor (front), and was extremely lean at idle. This isn't the first time its happened, but sometimes it will fire up great and drive normal for a few days and then just randomly happen.
I replaced the stock primaries with other used ones, and it still floods the rear rotor (I can take the injector plug off and it will make no difference).
I've tried different spark plugs as well, swapping spark plug wires, rewiring injector clips, but it still happens at random times.
My specs are 13b-REW, FC ignition, non-seq twins, Haltech E8, 550cc/1600cc injectors

I recorded a blackberry video with the engine details, maybe someone can spot something. Sorry dont know how to embed properly lol
http://s11.photobucket.com/albums/a1...10201-1252.mp4

C. Ludwig

iTrader: (27)

Could be a lot of things. What have you done so far? If the mapping is proper, I would suspect a weakness in the ignition side of things.

jaggermouth

iTrader: (1)

I've changed spark plugs (they wernt new though), swapped out plug wires, swapped out both primary injectors with other used ones (added 1600cc injectors in a KG rail with an aeromotive fpr) but the reason I bought a new fuel system was to replace my old leaky one which is what I thought the problem was originally, and I used new orings and diffusers. I also rewired my injector clips and I tested for resistance and it was all good.
I thought it was a sticking injector, but I decided it was something else after if still happened after replacing injectors.
The tune wasn't "Good" but I drove it for months with it and it never had a scary afr or any stutters, ran a bit rich but got better mpg than my stock FD. I was planning on a retune but I can't risk driving an hour and have this happen on a highway.

You think maybe a bad coil could cause this, or even the fact I didn't use brand new spark plugs (they appeared to be fine and ran the car for a few days no problems).
Really, any help is appreciated as I would like this thing driving again.

C. Ludwig

iTrader: (27)

So it ran well for several months, then it got cold, and now you have problems with it flooding?

jaggermouth

iTrader: (1)

actually, first time it happened was when it was summer time, then i left it for a few days, came back and it fired and drove like normal for 2 weeks, then it happened again at which point I changed the entire fuel system, orings and diffusers, drove fine for a bit, then it did it again...

jaggermouth

iTrader: (1)

also, i took both leading plugs out and neither of them were soaked in fuel? ill track down another coil and change my fuel filter as well

jaggermouth

iTrader: (1)

Needed to move the car today, fired up and ran great.
Sorry to be triple posting but what could be causing such a random problem?

C. Ludwig

iTrader: (27)

No clue. Sorry. Set the internal logger to record. When you have the problem go back and see what you see.

jaggermouth

iTrader: (1)

Is there anything specific I should log, or should I just do everything and hope I spot it? hah

jaggermouth

iTrader: (1)

Thought I'd update this.
I rewired all the injector clips with no difference. Ran out of ideas so I went to the Haltech end of the harness, jiggled it and the rotor fired up and ran great. Must have been knocked loose while installing the iq3.
Thanks for all the replies