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Author Topic: Cossy BOA running lean  (Read 1125 times)

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Offline Richard Knight

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Cossy BOA running lean
« on: May 20, 2020, 17:06:55 PM »
Hi All,
I have a BOA engine running in a kit car and she seems to be running lean - the egr is removed but all else is normal including ECU. is there a way to richen up the mixture at all?

Offline capri v8 driver

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Re: Cossy BOA running lean
« Reply #1 on: May 20, 2020, 19:05:20 PM »
How is the fuel pressure and the lambda values?

And no there isn't much you can do with the stock ecu to make it run richer. Losing the EGR creates a very lean condition in the mid range of the RPM and the ecu cannot compensate for it.  Some people used bigger injectors or upped the fuel pressure but that opens a other box of problems.

The only way to run the engine properly without the EGR is to use aftermarket ECU.
greetz Paul.

Capri V8 Driver.

Offline scud

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Re: Cossy BOA running lean
« Reply #2 on: June 03, 2020, 13:46:16 PM »
You say it seems lean,  what makes you think that?  Also what Paul said

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