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Ricky180b
PostPosted: Tue Jan 15, 2013 9:27 am 
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Hi all, I have a early 200b and just fitted a ca18de engine. Everything is ok apart from 1 problem the engine is idling at 1500 I've checked all pipes there's no leaks. I've asked Manu people here in uk but no one really has given me the right answer. The engine was running excellent out of the car it was from but just not in mine any help will be very much appreciated
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Nissanman
PostPosted: Tue Jan 15, 2013 10:41 am 
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I assume you have backed off the idle adjustment screw to minimum?
I know you have checked for leaks but it sounds like an air leak to me.
Are you using the Air Regulator for cold start?
This device is an electrically heated by-pass valve that goes from the air intake to the manifold, by-passing the throttle plate.
However if not powered up it will be open all the time causing high idle.

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Imago
PostPosted: Tue Jan 15, 2013 12:47 pm 
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Either that or you may be missing some vacuum lines.

CA18DEs are very sensitive to that kinda thing. Also make your your throttle body isn't cocked open from tension on the throttle cable.

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Ricky180b
PostPosted: Wed Jan 16, 2013 7:16 am 
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You see that yellow pipe ambient mine is a bit squashed as it got dented so its a bit closed could it be that
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Ricky180b
PostPosted: Wed Jan 16, 2013 7:32 am 
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Nissanman wrote:
I assume you have backed off the idle adjustment screw to minimum?
I know you have checked for leaks but it sounds like an air leak to me.
Are you using the Air Regulator for cold start?
This device is an electrically heated by-pass valve that goes from the air intake to the manifold, by-passing the throttle plate.
However if not powered up it will be open all the time causing high idle.

How do I check the air regulator is it powered by a positive or negative could you send me a photo of here this is and what it looks like please
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Nissanman
PostPosted: Wed Jan 16, 2013 11:43 am 
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Location: Adelaide.
Here is a link to the S13, S14 and S15 Silvia Service Manuals: -
http://www.mediafire.com/?52sxrychy59lz
Unfortunately, the file is not searchable but here are a few relevant excerpts: -
Attachment:
[ attachment ]
Air Regulator electrical location.jpg [ 79.26 KiB | Viewed 2293 times ]
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[ attachment ]
Air Regulator physical location.jpg [ 150.66 KiB | Viewed 2293 times ]
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Abnormally high idle.jpg [ 182.47 KiB | Viewed 2293 times ]
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CA18DE[T] Air Regulator.jpg [ 43.41 KiB | Viewed 2293 times ]
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Test of air reg.jpg [ 10.42 KiB | Viewed 2293 times ]
There is also the Fast Idle Compensating Device [FICD] which raises the idle to compensate for the load of the A/C compressor: -
Attachment:
[ attachment ]
FICD.jpg [ 21.08 KiB | Viewed 2293 times ]

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Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net
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Ricky180b
PostPosted: Thu Jan 17, 2013 5:15 am 
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Many thanks for this I will try this out over the weekend and let you no your help is appreciated
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