bagodoosh

my mechanic thinks my tune is wicked wacky and the base timing map is causing misfires.

<img src="http://mysite.verizon.net/bagodoosh/S4_timing.gif">

he said the timing spikes to near 30 degrees is not normal.

logs please? comments?

TwentyValveB5+S4

tell us about your setup (hardware, software, any lemmi tweaks)

TwentyValveB5+S4

readings, it could theoretically cause wacky timing.

nyet

i dont have logs handy, nor do i know what is "normal" though. ill try to dig through some of my old logs and see.

bagodoosh

i have the hitachi MAF, so the assumption was that its failure would be more unlikely. the graph i posted does have MAF data. the mechanic did not notice anything abnormal.

before i drop any names, i'd like to see some data of what the timing should look like at idle.

my mechanic was also concerned with the high degree of fuel/lamda correction, so he had more reason to doubt the tune:

<img src="http://mysite.verizon.net/bagodoosh/S4_fuel.gif">

bagodoosh

thanx - i did search for block 003 data and did not find much here

TwentyValveB5+S4

85mm MAF? 60# injectors?

Tony@EPL

and you agreed.

I would start with the basics. If your shop isnt able to figure it out, I would be more then happy to figure out what mechanical issue is causing misfiring.....

Let us know how we can help!

Tony@EPL

Correct, its mostly timing....as fuel or throttle plate angle would cause large changes in RPM.

Tony@EPL

on cars that are misfiring or having idle issues.

Its not "normal" but its what happens in this situation.