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CrAiGzEE
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what causes toyota ecus to retard timming? Mon, 14 June 2004 03:29 Go to next message
a mate of mines 1g is suffering severe ignition timming on boost
before i go round to check it out i wanna be 100% sure what causes it?

water temp sensor: when coolant gets to hot it puts it retards timming till ecu is reset

Intake air sensor: when the induction air is too hot it retards ignition temporary, till drop in temp

fuel pressure: when fuel pressure isnt high enough, causes it retard because there aint enough fuel??

anymore ?? feel free to correct if im wrong or add more
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1ndecent
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Perth
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January 2003
Re: what causes toyota ecus to retard timming? Mon, 14 June 2004 03:57 Go to previous messageGo to next message
As far as I know, the knock sensors are used to control timing retard. I have never seen a pressure transducer in a fuel rail(although I mainly blow up 7Ms) so I doubt fuel pressure is used for feedback.

Go to http://www.autoshop101.com and click the tech article link. Hours of reading, and a detailed explanation of just about everything...

[Updated on: Mon, 14 June 2004 03:57]

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EvilJack
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September 2002
 
Re: what causes toyota ecus to retard timming? Tue, 29 June 2004 11:26 Go to previous messageGo to next message
bump Razz
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thechuckster
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Brisbane
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February 2003
 
Re: what causes toyota ecus to retard timming? Tue, 29 June 2004 11:38 Go to previous message
1G GTE has two knock sensors screwd into the block underneath the intake manifold.

my 1G loom had no fuel pressure sensor and the air temp sensor is in the AFM so it's unlikely that it would see the heat from the turbos Wink
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