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These are 10.5mm Eagle leads, but does the same thing with the other leads, but I'll still check it out. This sounds more like a rev limiter being activated, which I have checked. If you look at the previous log you will see the flat spots on the rpm lines.

I've been playing with this car for the last week trying to find the high speed miss, & found nothing. Cleaned earth points, fitted & soldered new connections, numerous sensors, evened checked valve springs, compression, even made an aldl cable(of the techedge site) that I can't get to work, there's one on the just commodore site that I'll try when I get some resistors. In the mean time I have made this log with the LM-1 that uses holden202's bin that seems lean so I've added 10% to the injector rate,but hasn't changed much,ignore the green line which wasn't hooked up. All help greatly appreciated.

so is that log before or after changing the inj rate ?

either way it looks like its going rich when it should etc ...

one suggestion, maybe change the stoichiometric AFR from 6.40 to 6.50 or something like that, that will stop it going into closed loop, that looks to me what the wideband zig zagging is in that log .... although i don't think its a huge problem.... not really sure if stock o2 sensors like methanol though either.

it looks asthough its getting close, i'd be trying to richen it up a bit more with the injector rate because it looks like its giving you rich/lean readings when it should, its just that they are all a bit too lean.

by the way why is the idle so high ?

The 1st log was before the injector rats was changed & the 2nd was after. It doesn't have an O2 sensor fitted to the motor, only to the LM-1. We had a std chip fitted just before the 2nd log & hadn't been readjusted,the iac seems to let a lot air past as well. The idle screw can be backed right off & still idles at around 1200rpm, but if the iac port is covered the idle settles down further.

well if you don't have the narrow band in it you should disable it in the code (if you haven't already)

actually it might already be disabled, i know it was in my 202 tune.

and as i said before, change the stioch number so it wont ever think about going to closed loop

How do I check if the O2 sensor is disabled? Is it in the "flags/switches" section, 'oxygen sensor open'? Might be a few days before I get back to it, getting it checked out with a Tech 1 to see if the miss fire can be located, I think something is dodgy in the wiring loom, maybe a dry solder joint giving the ecu incorrect feed back?

umm this misfire, is this with the drilled injectors in it ? not saying its the problem just a thought ....

oh F$%K ...... it appears the bin i sent you has a reference angle of 10 degrees .... i don't know if that would run at all on a v6 .... anyways, change that for starters.... needs to be 70 degrees for V6 (EST params - Spark reference angle)

ok one you want to look for is Process Code 43 - Knock Sensor Failure - this is disabled in that bin i sent you.

also ESC Params - Coolant Temp Enable is set to 151 degrees .... thats for disabling knock sensor too.

if you enable the knock sensor may aswell enable "MAP A: set=Knock Logging Enabled" .... but this will only work with a realtime board.

Road speed params - Speed sensor constant Pulses/Kilometer - change that to 1250

it appears for o2 sensor not being there you probably want to change the following:

CEL Enable Code 13 - Oxygen sensor open = unticked
Process Code 13 - Oxygen sensor open = unticked
Malf 13 - Coolant Threshold = 151 degrees

these next ones im not sure if they are needed or not
Closed Loop Params - Closed Loop minimum coolant temperature (Default 44*C) = (would be 151 degrees if needed)
Closed Loop Params - Closed Loop minimum coolant temperature While Idling (Default 44*C) = (would be 151 degrees if needed)

also Map A: Run A/F Param - Stoichiometric A/F ratio - set this to something like 6.50 or something like that, and it should never go into closed loop then.

looks like i missed a few things the first time round.

Delcowizzid or VL400 or someone else might like to confirm the above stuff for disabling o2 sensor

It's not using a realtime board. With the "Knock sensor" settings listed, does this matter if it has no knock sensor fitted? Have tried 3 sets of injectors in the engine, all do the same thing, these all work ok in another engine. I've made the rest of the changes & will test them. I see that there is also that you have "Boost" mentioned in this bin, is that for forced induction , if so we might try it with the blower with the appropriate numbers installed, if you have time to give us a starting point for a 2 bar map sensor.

so have you removed the knock sensor?

if you have provision for a knock sensor i'd be using it .... if not just disable it as per the above info.

boost .... well i haven't actually run a boosted engine but the $12P bin has the functionality.

get something like this: http://cgi.ebay.com.au/2-3-BAR-MAP-SENS ... 2ea94f9590

there are cheaper ones out there too if you look hard enough .... then just change the settings in the bin to reflect 2/3 bar sensor and off you go. while under vacuum it uses the normal 20-100kpa ve table, then under boost it uses the boost ve table - i believe this is a multiplication of the 20-100kpa VE table. Same goes for spark tables too except they are fixed values not a multiplication value.