CIS Cold start valve excitation?

[Ben Swann]

Lou,

I'm not sure what you are trying to do exactly, but you can initiate cold start injector test by inserting fuse in f.p. relay.

The first test when ign. is switched on is to turn on the fuel pump.  When fuse is pulled annd re-inserted the4 second test will cause the c.s. injector to fire 10 times, which can be heard clearly - if not then something is wrong.

During normal operation c.s., duration injector operates/firees is dependent upon engine temp.

Hope that helps.

Ben

Date: Mon, 1 Dec 2003 07:14:36 -0500 (EST)
From: "Louis A. Mulieri" <mulieri at physiology.med.uvm.edu>
Subject: Re: CIS Cold start valve excitation?
To: quattro at audifans.com
Message-ID:
<Pine.LNX.4.44.0312010659550.26062-100000 at physiology.med.uvm.edu>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi,
Can someone tell me the details of how the CSV is activated by 
it's control computer in my '88 5KCSTQ (CIS)? Bentley says there should be 
12 v on terminal 1 of the CSV connector but it doesn't say whether this is 
true only while the CSV is activated. So my question is: Does CSV squirt 
when terminal 2 is grounded or when 12 V is delivered to terminal 1? 
Looking at the wiring diagram, it looks like both changes may be required. 
If so, what event controls when 12 V is delivered to terminal 1 and what 
event controls when ground is delivered to terminal 2?
I'm hesitant to go probing with my VOM for fear of damaging the 
CSV output circiutry of my computer. And, taking the CSV out to check 
spray action requires many overlying hoses and brackets to be removed on 
my trubo engine.

Thanks for help on this.

Lou