Re: was IACV AGAIN - now more questions and Orange cars

Roger,
Am on digest - sorry for slow reply and perhaps any repeated info...  My
comments are based on experience with IACV on Toyota engines - hopefully it
helps.

> The throttle cable is fine & the 2 springs snap the throttle closed.
Saturdays
> experience shows it's not this. Bonnet off, air filter off, throttle
butterfly
> fully closed, engine @ 2.5 to 3k revs!!!  Blipping the throttle gave the
> symptoms of pulling a manual choke out when warn (ie it didn't rev
higher - it
> tried to stall).

This sounds like an inlet manifold leak to me (like I have at the moment!).
The ECU with lambda sensor should compensate and give you the correct
mixture.  Blipping throttle and the engine trying to die sounds like a
definite mixture problem though.

> So? can I start the engine without the iacv screwed on the plenum &
without it
> wired up - then connect it up and watch it move out & pull the connector
off
> (or does it move out too quickly to pull the wires off before it drops
out)??

Without the IACV connected on my engine, it idles around 1700 rpm.  Plug it
in and it brings the revs down to 800-1000 within 3 or 4 seconds.  Also, the
TPS incorrectly set will result in a higher idle speed (say 1300 rpm).  I
have no experience with Emerald, so cannot comment,  although some after
market EFI setups do not use IACV, and others do.

Hope you get it sorted soon.

Completely off this topic and onto Orange coloured cars......  Dave Mackie's
PRB/Birkin Busa not only looks good, goes well, it is also VERY nicely put
together - a credit to Dave and Tim.  It also has a not quite identical twin
(Tim's car) going through Aussie rego.

Regards, Richard
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