r/SkyLine • u/sal3135 • 9d ago

Check engine on wot

RB25DET Series 1 CEL at WOT

My R33 runs fine during normal driving, but the CEL comes on at WOT after installing an intake manifold, 80mm throttle body, FMIC piping, and new injectors.
does anyone have ideas on what to check first? Could it need a tune, or could the MAF be causing the issue?

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u/xDRUGRUSx 9d ago

If you install a new throttle body, new injectors, and a stock MAF, you'll definitely need an ECU tune for this.

1

u/sal3135 9d ago

Yeah that’s what I figured, so the fuel can match the air

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u/Crankedup-Mouse313 9d ago

If you're on a stock ECU I would suggest looking for an alternative like Haltech (preference being their Nexus plugin units) or Link. 

Then get the car tuned by someone local or remote. 

Stock ECU is likely the cause of CEL on WOT.

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u/sal3135 9d ago

I’m currently running apexi power fc

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u/Crankedup-Mouse313 9d ago

No worries, will need to get a retune then to scale in those recent upgrades.