Timing problem with hack

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Jul 19, 2003 | 05:20 AM

NOSED_CRX_VTEC

Thread Starter

Joined: Sep 2002

Posts: 231

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From: SURREY, United Kingdom, UK

Timing problem with hack

Can someone please explain why the Vafc alters the timing.
I cant see why it does it.

Thanks

Jul 19, 2003 | 09:22 AM

sharkcohen

Joined: Jul 2002

Posts: 2,374

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From: East Bay, CA, USA

Re: Timing problem with hack (NOSED_CRX_VTEC)

A drop in MAP voltage normally is associated with an increase in engine vacuum. The ecu is programmed to respond to this by advancing the timing. When using the hack, you are artificially reducing the MAP voltage to run larger injectors and prevent the ecu from "seeing" boost.