rollie

iTrader: (1)

As the title says I'm having issues with spark cut at 1800rpm. It starts and idles fine but when throttle is increased to 1800rpm the tach jumps around. I tried the set igntion to 10 degrees and adjust the spark latency while using a timing light method to no avail. As far as I can tell there aren't any other factors that would cause spark to cut this early is the rev range. Attached is the .msq.

Setup:
1.6
ms3
m45 supercharger
stock coils
afm removed

I am a noob so any help is appreciated. Thanks!

Braineack

iTrader: (62)

did you tune r56 r52 and r11?

Ben

iTrader: (33)

A datalog may have been helpful, but barring that, I would venture that your ignitor is failing and needs to be replaced.

rollie

iTrader: (1)

All of the resistor pots were tuned in according to the west field manual. See attached datalog.

rollie

iTrader: (1)

Also the ignitor was working fine last week before ms3 so unless something ruined it during first startup I would venture to say its still okay.

aidandj

iTrader: (5)

Ignitor could have been fried. Did you unplug it when first flashing firmware and stuff?

acedeuce802

iTrader: (1)

The firmware was flashed outside of the vehicle while powered by a JimStim. The MS3 was plugged in at first with a map configured for a '99 (but not attempted to start), then the 1.6 base map was flashed before first start.

rollie

iTrader: (1)

For those of you who don't know, Adam is helping me work on this, hence his response to the previous question.

Braineack

iTrader: (62)

I dont see anything glaring in the log (looking at raw data). Do you have rev limiter by temp turned on?

aidandj

iTrader: (5)

I checked his msq and he doesn't.

Braineack

iTrader: (62)

I glanced at the msq yesterday and didnt really notice anything.

the Req-fuel is a lot higher than normal and 5.0 dwell on the stock ignitor is also high.

rollie

iTrader: (1)

Could the higher dwell time have fried the igniter? What is an average value for that?

rollie

iTrader: (1)

Also this seems like a stupid question but is the igniter supposed to be mounted on the frame for a ground? Since I redid my harness it's floating under the dash.

Braineack

iTrader: (62)

for a stock ignitor, i believe i use 3.5ms @ 13.2v.

I don't believe the ignitor grounds itself, so no.

rollie

iTrader: (1)

I'll try adjusting that and readjusting the pots. If that doesn't work I'm gonna try to pick up a spare igniter today.

Braineack

iTrader: (62)

that log doesnt show any sync loss. and easy enough to do a composite log to see if youre dropping the crank or cam signals.

rollie

iTrader: (1)

So you don't think it's the igniter? I'll grab another log at lunch and post it up.

rollie

iTrader: (1)

Attached is the new composite log with the igniter dwell down to 3.5ms. Changing the dwell had a positive effect on the bouncing revs but the car still won't rev over 2k.

Ben

iTrader: (33)

I would venture that your ignitor is failing and needs to be replaced.

rollie

iTrader: (1)

I take it thats a common symptom of that failing? Looks like its time to go LS Coils...