Re: it dosent exist - Saab Performance Bulletin Board - Saabnet.com
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Re: it dosent exist
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Posted by Eric Law [Email] (more from Eric Law) on Wed, 29 Jun 2005 12:43:15 Share Post by Email
In Reply to: Re: it dosent exist, Diddi, Tue, 28 Jun 2005 10:09:18
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Actually CIS does have a fuel pressure regulator, it's just not a separate item like in electronic systems.

Any decent service manual that covers the CIS should show where the regulator is (called a "line pressure regulator") - it's screwed into the side of the fuel distributor. You can unscrew it, and there's a spring which usually has a few shims underneath it. If you add or swap in a washer to increase the height of the shim stack maybe .050", it will give a nice increase. You'll have to readjust the mixture after doing this.

Be aware that increasing the FP *may* not fix your problem. Unlike most systems, in CIS the injected fuel quantity is not proportional to fuel pressure. However, the quantity can drop once the manifold pressure goes above a certain amount, if this is the problem then increasing the FP will help.

Eric Law

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