cellulis44

iTrader: (11)

Yup.. had my VE about perfect except for some random spark blowout, so I fixed the blowout.

TR6's gapped 35

well, I gapped them to 28, and I went to running rich at idle and LEAN LEAN LEAN in boost.

Spark blowout is GONE... engine is now running like it should just LEAN.. one or two VE adjustments later and its running better than ever.


Just thought I'd drop this out incase someone was having SPARK BLOWOUT issues...

E-Works

iTrader: (4)

spark blowout sucks

unclebens

iTrader: (2)

i know this is an old post but i believe spark blowout should cause the wideband to read lean due to more oxygen in the exhaust

Mike@Diablosport

iTrader: (2)

If the spark blew out, the fuel in the chamber would not ignite, thus a rich condition ensues

unclebens

iTrader: (2)

When I forgot to plug in one of my coils my wideband showed really lean. The guys on the EfiLive forum told me that it would show lean because no ignition would mean all the oxygen is still there unconsumed and that is what o2 sensors look at.

billdk

Please elaborate.. why... why WHY would uncombusted fuel cause a rich oxygen environment??????

Are you an engineer at Diablosport?

cyipher

iTrader: (1)

correct misfires show lean due to unused oxygen in the exhaust.

STAR

iTrader: (1)

Curious, does spark blowout sound like or act like your hitting the rev limiter?

joecar

Yes, there is a difference between raw unburnt fuel (oxygen has not been consumed) and a rich burn (all the oxygen has been consumed and some fuel remains unburnt because there is no oxygen remaining)...

wideband measured lambda (which is defined to be the remaining oxygen proportion).

BLK02WS6

iTrader: (2)

What Joe said ^

castellscl

Anyone got a response to this?
I've got the same question.

unclebens

iTrader: (2)

blow out is not as consistent as the rev limiter, not as fast at coming in and out. you might blow a few sparks out and some might light. kind of like a quick temporary bog

LSxPwrDZ

iTrader: (4)

First part of advise is to get rid of those TR6 plugs... Put some NGK 3346 (BR7EF) plugs in it and I would bet it run's even smoother! Non-projected will help with blow out quite a bit and not act like a glow plug in the chamber when cylinder pressure get's high.

jimmyblue

iTrader: (11)

I doubt you're running lean, rather burning incompletely and spoofing
the wideband. There's such a thing as too little gap, too.

Higgs Boson

iTrader: (3)

I run B8EFS plugs gapped at .032 but I spray.

Sarg

iTrader: (6)

Jimmy, what would you consider to be too little gap on a FI application?

jimmyblue

iTrader: (11)

Don't know what the minimum is, but the less kernel energy
the less complete the burn. You have basically a fixed coil
current, gap is voltage hence spark power in the hole. "As
much gap as doesn't blow out" (or failure to jump the gap
at max cylinder pressure) is the best you can do and it goes
downhill from there.

Played any with increasing dwell (volt-seconds, equals
current)?

Sarg

iTrader: (6)

Different world I know, but in the import world at high boost it is not uncommon to gap down the plugs to a 26-28. Some guys even go crazy with it and will go down around 22 for 35+ psi.