Stock ECU not richening under boost

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mknz
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Re: Stock ECU not richening under boost

Post by mknz »

Is the FC even richer then?

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4CylinderSpecial
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Re: Stock ECU not richening under boost

Post by 4CylinderSpecial »

mknz wrote:Is the FC even richer then?
Nope. Well my wideband only reads to 9.0 so I can't actually be sure lol.

mknz
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Re: Stock ECU not richening under boost

Post by mknz »

4CylinderSpecial wrote:
mknz wrote:Is the FC even richer then?
Nope. Well my wideband only reads to 9.0 so I can't actually be sure lol.
What about at idle/cruising? If the FC didn't get richer now that the fuel pump has changed then I'd guess that the Toyota ECU hit some programmed limit about how much fuel it thinks it's injecting to prevent an over fueling runaway scenario

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4CylinderSpecial
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Re: Stock ECU not richening under boost

Post by 4CylinderSpecial »

mknz wrote:
4CylinderSpecial wrote:
mknz wrote:Is the FC even richer then?
Nope. Well my wideband only reads to 9.0 so I can't actually be sure lol.
What about at idle/cruising? If the FC didn't get richer now that the fuel pump has changed then I'd guess that the Toyota ECU hit some programmed limit about how much fuel it thinks it's injecting to prevent an over fueling runaway scenario
No change in idle/cruise. Yeah it's a mystery but I'm glad that i've inadvertently fixed it one way or another. With the only real constant being changed being the fuel pump it seems a bit strange. Map sensor is healthy and TPS works fine. So not sure why else the car would stay lean.

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