Just after some help,
as you know was on the rollers with the v8 the weekend and we hit max revs of about 6.5k
came home and played with the .msq turned one of the values over in the h2 table etc and loaded the .msq up,
took for run today and it wont rev past 6.3k it sits and missfires just like it has got a rev limiter,
if you sit stationary and floor it it does the same thing with foot to the floor and it wont go past 6.3k just sits there bouncing on the rev counter if its got a limiter.
i have taken a datalog and the present .msq, i tried it with als on and off and made no difference, also uploaded an old .msq that had the h2 value blank as per the weekend which also makes no difference, other wise the car revs to this point no problem.
http://www.v8forum.co.uk/zip/latest.zip (http://www.v8forum.co.uk/zip/latest.zip)
Looking at 3350.428s It looks like the throttle is coming up and consequently the fuel cuts, can you hold it at 6300 for a while so we can see what's happening?
i'll try tomorrow mate,
not to keen holding it at them revs with it bouncing on the revs.
how long you need it sat there for a reading?
thanks for the help, as its got me puzzled.
ItÃ,´s not the same problem as i had?
The launch control rpm limit was the fault, even though it was disabled, so try to raise that limit!
I just wrote 25500rpm, then the rpm limit was gone :)
/Skassa
could something i changed be upsetting the fuel pump?
as thats on a different channel,
one of the ignition outputs if im correct,
just seems a bit suspect i changed a h2 setting now this is happening, the one that was blank was 2 bit 0-2 others all said Ign in drop down, and from 0 bit 7 to 7 bit 7 were all set at 0
couls this be something causing it?
If the fuel pump was switching off you'd get a leaning out of the lambda, the lambda is pretty flat, all be it rich.
Rob
cool so can rule that out :D
Check anti lag system(als) if is disabled.
well did another datalog and held it to the floor for a while so you could get a reading, but at a cost,
the fan belt snapped and she overheated big time and split a rad hose,
so fingers crossed we can find the problem now as need to order a top hose, you can see on the log where it broke battery voltage drops to 11.
http://www.v8forum.co.uk/zip/newdatalog.zip (http://www.v8forum.co.uk/zip/newdatalog.zip)
im going away in the morning for 4 days,
so if any one needs me regarding this problem, stuball and Rob have my number,
I also bought new plugs, rotor arm and cap today, to try and help eliminate things,
along with the radiator, fanbelt and radiator hose :(
not had chance to test yet as the radiator is on order with the hose,
(http://www.vems.co.uk/VEMSTech/tcmissfire.jpg)
Can you pull some of that fuel out? Its extremely rich: 0.7 is possibly on the verge of rich missfire - if the sensor is reading it correctly, it might be a little richer than that...
i'll take some out when i come back off my hols mate,
I gather the log showed nowt else then other than rich at that point?
Your map readings are strange(unstable). Try to add 2-3m of hose between map sensor and plenum.
And when you have missfires lamda doesn't read(it's frozen).
Quote from: MWfire on August 28, 2008, 10:51:19 PM
Your map readings are strange(unstable). Try to add 2-3m of hose between map sensor and plenum.
And when you have missfires lamda doesn't read(it's frozen).
in total? or add an extra 2-3m of hose to whats already there ???
add extra 2-3m hose.
thats gona be fun to hide
Or you can add 0.1liter tank like thise
(http://img144.imageshack.us/img144/1644/69027078pb1.th.jpg) (http://img144.imageshack.us/my.php?image=69027078pb1.jpg)
that looks like an inline filter as used on carbs?
am i correct???
Seems like it.
Quote from: Tony C on August 29, 2008, 12:42:29 AM
that looks like an inline filter as used on carbs?
am i correct???
Yes
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 :(
here we go,
http://www.v8forum.co.uk/zip/data04-09-08.zip
Quote from: Tony C on September 04, 2008, 10:17:58 PM
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
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
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,
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
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...
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 :(
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.
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?
Have you tried reverting to the dnb map? Just for test purposes.
yes mate got the same results, a missfire/holding back and very very rich at said point as per other logs,
Daves looking to see if he still has the o/e copy of my .msq, as will load that one on aswel just incase my copy i have changed,
Stu's is definitely VR. Tony - I'm fairly sure yours is Hall.
Best of luck with the valvetrain.