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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,790
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How do you test the Cold Start Valve
'74 2.7 CIS:
My car runs very well warm, but starting has some issues. Cold: Car starts with throttle lever up & will run with lever down after about 2-3 minutes. Warm: Car runs well but after turning off engine for just a minute (like at a gas station), the car starts and behaves like it is flooded. It sputters for about a minute and will die with out foot on gas or throttle lever up. Just replaced accumulator. Have not replaced check valve but during the accumulator replacement, I noticed that the fuel line was pressurized - this makes me assume the check valve is ok. It's hard to describe how the engine runs while starting warm....but here goes. Putt..........putt........putt.......putt....putt. ...putt....putt...putt...putt..putt.putt.putt.putt .putt.putt.pitt.vroom. So, how would I check the cold start valve & do these symptoms sound like CSV issues? My guess is that it's working but not stopping and therefore too rich at warm startup. Other Recent Tuneup Items 01/2012: all new vacum lines, injector seals, injector sleeves, manifold gaskets, manifold o gaskets, plug wires, plugs, cap, rotor, valves adjusted, fuel filter. Any advice would be appreciated.......Vern Last edited by Tidybuoy; 03-16-2012 at 11:03 AM.. |
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03-16-2012, 10:58 AM
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vern, do you have CIS pressure test gauges?
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poof! gone |
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03-16-2012, 12:43 PM
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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I don't think your car would start at all without CSI.
But I'll answer in case you want to test it/back flush it. I used a battery that was at about 11 volts as I did not want to over heat its internal windings. Hook it up and heard it click. Then I reverse flush it with compressed air and injector cleaner mix. You can then check spray pattern by energizing it when you have supply side under pressure.
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Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
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03-16-2012, 01:35 PM
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Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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disconnect the plug (thus deactivating the CSV) and see if the problem goes away.
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03-16-2012, 02:06 PM
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Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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(but from what you describe, I don't think the CSV is your problem)
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03-16-2012, 02:07 PM
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ROW '78 911 Targa
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New accumulator defective?
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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03-16-2012, 02:49 PM
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Registered
Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,790
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Quote:
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03-16-2012, 06:54 PM
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Heinz
