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Dept store Quartermaster
Join Date: Jul 2001
Location: I'm right here Tati
Posts: 19,858
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My CIS test numbers, diagnosis please.
Ok I have the JC Whitney tester and ran some tests last night. My tester does not look the same as the Porsche tester but I am sure it's principle is the same.
With the valve closed and the unit connected and bled between the WUR and Fuel distributor I have the following numbers. Vave closed/pumps on/ 81F(27C) temp/ = 87psi/6 bar Valve open/pumps on/ 81F(27C) temp/ = 58 psi/4 bar (huh???) Fuel delivery rate/ one minute / valve closed = 235cc's Fuel delivery rate/ one minute / valve open = 235cc's I cannot figure out how to test warm control pressure, it says to remove the governor plate and jump a relay underneath it? Where the heck is that? Anyway how do my numbers look? Thanks guys.
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Cornpoppin' Pony Soldier |
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07-02-2003, 05:17 AM
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Dept store Quartermaster
Join Date: Jul 2001
Location: I'm right here Tati
Posts: 19,858
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Anyone?
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Cornpoppin' Pony Soldier |
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07-02-2003, 08:23 AM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
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Here's what I know (or at least THINK I know). The two pressure numbers you are looking for are the Control Pressure and System Pressure. Control Pressure is what is regulated by the WUR. Control pressure changes as the engine warms up. So, when evaluating the WUR, you're watching the pressure change during the first few minutes after the engine is started. And the starting control pressure, compared to the temperature of the atmosphere.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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07-02-2003, 08:33 AM
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Registered
Join Date: Apr 2003
Location: Las Cruces, NM
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With the valve open should'nt it be delivery less fuel?
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2007 Mazda 3 hatch 1972 Porsche 914 roller with plenty of holes to fix 
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07-02-2003, 08:34 AM
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Dept store Quartermaster
Join Date: Jul 2001
Location: I'm right here Tati
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I dont know. The book did not even say to test both ways, but I figured any info is good info.
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Cornpoppin' Pony Soldier |
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07-02-2003, 08:40 AM
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Join Date: Dec 2001
Location: MA USA
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With a cold motor, hook up the tester. Unplug the WUR electric plug. Do the sys pressure. This should be high pressure. Then switch the valve. this would be the cold pressure. Should be lower. Then plug in the WUR and wait with the ign on for 2 mins. The pressure should rise. This is your warm pressure. Compare pressure specs to what the book says.
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Dean 911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno, |
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07-02-2003, 04:52 PM
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Dept store Quartermaster
Join Date: Jul 2001
Location: I'm right here Tati
Posts: 19,858
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Thanks blown, very different instructions than the book but hey. Thanks again.
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Cornpoppin' Pony Soldier |
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07-03-2003, 04:52 AM
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