z31p_NissanXRMA: Forum archive import (z31performance)

2026-05-15T05:10:12Z

Forum archive import (z31performance)

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{{ForumImport
|op_user=NissanXRMA
|op_date=2013-07-28 16:10:44
|post_count=3
|archive_url=/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-management/22245-nistune-woes.html
}}

'''NissanXRMA:''' (2013-07-28 16:10:44)

I'm going to be honest, this is a noobish question. Probably cut out for the basic-mods section, but on with it.

I'm aware nistune is not plug and play by any means with a stock tune and a modified K value.

But so far my K is around 320 and my latency is around 1000. Timing is set at 10 and Nistune confirms.

The problem is that the tune never seems consistent. When fully warmed up, the Z will run rich.

Around 12.5 AFR idling, 12-13 cruising and 10-11 at 7psi boost, richer with throttle position. But

suddenly the tune will change and the idle will be around 14.5 which is where i would want it, cruising is around 14

and any amount of boost, the AFR's stay around 15-15.5.

The tune is permanently burn so it's not a temp file. It's almost like it switches maps. Making tuning impossible.

Any ideas?

EDIT:

My setup consists of a 255lph, 420cc injectors at stock fuel pressure, Stock MAF, t4 turbo at 7psi, intercooler, vg33

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'''michaelp:''' (2013-07-28 16:59:03)

Enrichment tables…cold start, warm start etc....

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'''Axel kain:''' (2013-07-29 03:54:38)

^this. and check temp conversion.

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z31p_NissanXRMA: Forum archive import (z31performance)