R34 GTT load scale not tracing
Moderator: Matt
R34 GTT load scale not tracing
I'm having great fun with this GTT!!!
Changed the AFM for a Z33 so I could get a good resolution through out the rev range, trouble is since changing I've not had the load scale on the fuel mixture map trace across the X-axis of the map.
I've attached the log and bin file.
Changed the AFM for a Z33 so I could get a good resolution through out the rev range, trouble is since changing I've not had the load scale on the fuel mixture map trace across the X-axis of the map.
I've attached the log and bin file.
- Attachments
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- NIStune_2015-01-27_1009_18.csv
- (48.5 KiB) Downloaded 143 times
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- R34GTT-Z33-DW700cc.bin
- (64 KiB) Downloaded 166 times
Re: R34 GTT load scale not tracing
Its been a common issue which is seeming to come up today (with all models!) where the TP tickbox is becoming unticked in the latest versions
Display > Select Consult Registers
Tick the 'TP (load)' or the 'BFuel Schedule (TP)' tickbox to enable load tracing again!
I'll make a fix this week to force it back on!
Display > Select Consult Registers
Tick the 'TP (load)' or the 'BFuel Schedule (TP)' tickbox to enable load tracing again!
I'll make a fix this week to force it back on!
Re: R34 GTT load scale not tracing
That's great, thanks Matt. I'll give that a shot in the morning
Re: R34 GTT load scale not tracing
Gave that a shot and it was already selected. When I unplugged the MAP sensor and switched off the faults it started tracing across the map as it should.
I'm getting another problem that I thought was the standard maf going hugely rich once it starts to boost, or when I'm full throttle. What's the usual suspects for this? To scaling?
R34 GTT
bigger turbo
cat-back exhaust
FMIC
Blitz SUS cone filter
DW 700cc injectors (hate these things)
Z33 AFM
I'm getting another problem that I thought was the standard maf going hugely rich once it starts to boost, or when I'm full throttle. What's the usual suspects for this? To scaling?
R34 GTT
bigger turbo
cat-back exhaust
FMIC
Blitz SUS cone filter
DW 700cc injectors (hate these things)
Z33 AFM
Re: R34 GTT load scale not tracing
Try pulling back your injection multiplier a bit so its not running so rich. Once you have that right, adjust your TP scales on your fuel and timing map
The log you posted showed no 'TP' register selected initially
The log you posted showed no 'TP' register selected initially
Re: R34 GTT load scale not tracing
Back on this GTT again, Matt could you look at these logs and confirm there's nothing the ECU is doing that could cause the misfire, it's load dependant from the looks of things so I'm guessing that the ebay coils just aren't up to the task
- Attachments
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- NIStune_2015-02-27_1642_39.csv
- Full throttle boost set higher than achieved
- (135.87 KiB) Downloaded 133 times
Re: R34 GTT load scale not tracing
data log from dyno run
- Attachments
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- r34misfire.jpg
- (412.54 KiB) Downloaded 3715 times
Re: R34 GTT load scale not tracing
bin file and short data log with low boost
- Attachments
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- NIStune_2015-02-27_1651_50.csv
- (19.04 KiB) Downloaded 120 times
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- r34gttZ33afm700ccmisfire.bin
- (64 KiB) Downloaded 171 times
Re: R34 GTT load scale not tracing
fuel maps need a bit of cleaning up. You have it going too rich and then lean. Normally with an R34 it goes up smoothly and then flattens out, not a valley at the top end
You can see this in your dyno graph also, it goes richer at 3000rpm and then goes leaner. You want a nice smooth curve once you've reached your target boost AFRs
Regardless of this, the logs arent showing me anything showing problems with timing. I'm seeing about 21 degrees timing at the top end and 10ms injection time until you get the ignition cut around 4500rpm.
The cut appears unrelated to the tune itself, so would be looking at the plug gap and coil setup
You can see this in your dyno graph also, it goes richer at 3000rpm and then goes leaner. You want a nice smooth curve once you've reached your target boost AFRs
Regardless of this, the logs arent showing me anything showing problems with timing. I'm seeing about 21 degrees timing at the top end and 10ms injection time until you get the ignition cut around 4500rpm.
The cut appears unrelated to the tune itself, so would be looking at the plug gap and coil setup
- Attachments
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- r34_trace.png
- (152.11 KiB) Downloaded 3698 times
Re: R34 GTT load scale not tracing
Thanks Matt, just needed that confirming. I know the tunes a mess, I've started with a blank standard tune and just addressed the areas this misfire to try ruling out the tune
Re: R34 GTT load scale not tracing
double post
Last edited by Chris250 on Tue Mar 17, 2015 9:18 am, edited 1 time in total.
Re: R34 GTT load scale not tracing
Eventually!!! a set of genuine Nissan coils off of a low mileage engine and we have a finished map, one little miss half way through the run but apart from that all good. I really should have just stuck to my guns at the start and got a set of decent coils in
https://www.youtube.com/watch?v=_q2VIcw36Oc
https://www.youtube.com/watch?v=_q2VIcw36Oc
- Attachments
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- R34 GTT.jpg
- Final figures
- (77.63 KiB) Downloaded 3655 times
Re: R34 GTT load scale not tracing
Yeah the coils in these are old... mine are giving up on me also. Looking for replacements soon