Hi Rev Misfire as in past 6k

[Tony C]

thats gona be fun to hide

[MWfire]

Or you can add 0.1liter tank like thise

[Tony C]

that looks like an inline filter as used on carbs?
am i correct???

[gunni]

Seems like it.

[MWfire]

that looks like an inline filter as used on carbs?
am i correct???

Yes

[Tony C]

well after the holiday break, i thought it was time to tackle the car again,
so fitted the rad and top hose new plugs, new cap,
fired her up sounded sweet as always, took for a run all seemed fine then let rip,
asnd yup the miss fire is still there,
will upload  the datalog shortly, i backed the ve table off and it still shows rich

[Tony C]

here we go,
http://www.v8forum.co.uk/zip/data04-09-08.zip

[GintsK]

here we go,
http://www.v8forum.co.uk/zip/data04-09-08.zip

Why your advance is fixed 9deg?
Engine runs over rich from 6000.
Crank signal is uneven. MAP signal - noisy.

Gints

[Tony C]

dont know about the advance as using a dizzy for ignition and not the vems,
im going to drop the ve table right down now and do another log to see what happens this time,
 
thanks for the help so far guys

[Tony C]

just been out dropped the ve table even lower from 5500 upwards,
still a miss fire but not as rich now,
http://www.v8forum.co.uk/zip/data05.zip

Rob,
if i wanted to remove the cdi unit to eliminate it can i just conect the vems trigger to the negative of the coil?
or do i need to change something wthin vems?
and is Stus and my vems swappable, eg trigger wise???
as may lend him my vems to eliminate it as his car revs ok,

[Tony C]

decided to do a test today while waiting for any advice,

set the hyfire with a rev limit of 3k
took for run and did a datalog,
and im sure its not an ignition problem,
as the datalog shows the car going lean (ecu not being triggered when no ignition) when on the limiter,
where as when it hits 6k it goes mega rich, ecu still triggering yeah?

so its either a valvetrain problem (looking into this next week, stripping engine down) or a possible ecu setting problem?, anyone agree with the ignition being clear???
im going to take the top half of the engine apart next week etc to check lifters , cam etc, could the valve springs be weak after the rolling road giving valve bounce?

datalog here:
http://www.v8forum.co.uk/zip/log06.zip

[[email protected]]

This forum doesnt always show me new posts
I dont think you can remove the CDI and still get a tacho signal because your input is hall and we'd need VR to run off the coil signal.
I dont remember Stu's setup, if you can email or pm me his serial number I'll enquire and see what the spec is.

Your reduction of fuel certainly seems to have cleaned up the lambda values, we can discount the rich mixture misfire, I'd bet the engine feels better with less fuel uptop doesnt it?

The RPM seems very spikey...

[Tony C]

it didnt feel any different to be honest Rob,
im going to be pulling the top half apart next week to double check every thing mechanical wise mate,


regarding the hall and VR is that something inside the vems that needs changing mate?

the ve table at WOT is now lower than what it was before the rolling road 

[[email protected]]

Hall and VR are set up differently on the PCB.

The VE table being lower than at the rolling road is not a massive problem - it was hugely overfuelling at WOT before, at least you're burning most of the fuel you're paying for rather than passing it down your exhaust.

[Tony C]

true,
but i was refering to the ve table i have been using prior to the RR,
which was the ve table dnb did for me which it ran real good on mate,

thanks for clearing that up regarding the VR and Hall mate,
so mines Hall trigger then yeah?