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Registered
Join Date: Dec 2007
Location: Paducah, KY.
Posts: 112
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Need help with CIS Injection System
Hi Guys, just bought a donor car for the 3.0 motor and trans from this website. The car is a 79 SC. I just want to run the motor to check the tranny out before I pull engine & trans to start engine build. The wiring has been butchered severely and the fuel tank was already out so I have hot-wired the fuel pump to run constant and using a remote fuel can to flush the system. Symptom: Motor will start immediatly but dies quick. sounds like it runs out of fuel as soon as it spools up. What are some of the first things to check? There is not an air filter on the car yet (will be in Wednesday) and I am trying to start it with the breather lid off
I've got an AutoX to go to this morning but will be back later tonight, thanks for your help in advance!! 
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1976 911s,2.7, Cobalt blue, G 40 cams, Weber 40 IDA, SSI / Dansk, MSD 6AL 1991 964 Turbo,3.3 ,Polar silver, Fabspeed headers and exhaust, stock W/G, Greddy EBC, Synapse BOV, BL WUR w/ RPM CSV switch, CIS Fuelhead mods, GT 35 Turbo, Snow W/Meth Inj., K&N Cone Air Filter, AAR delete, Decel valve delete, Zeitronics ZR-2 AFR 1994 968 White, bone stock! (son's first car) 
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09-07-2008, 03:44 AM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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If you search you will find a lot of info on CIS starting issues. You are describing a very common one whereby the engine seems to start on the CSV but then dies from lack of fuel. This is often the result of a too high cold cp, which is caused by an out of spec WUR, or sometimes an AAR not functioning correctly to keep revs up during warmup. If you check fuel pressures w/ a gauge you can find out what the WUR is doing.
In the meantime you can try holding the sensor plate up and see if that @ least keeps the engine running long enough to flush the system.
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone Last edited by Paulporsche; 09-07-2008 at 07:53 AM.. |
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09-07-2008, 07:51 AM
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