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Registered
Join Date: Jan 2007
Posts: 472
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car keeps dying on me..help!!!!
I have a 1982 porsche sc and it has been running perfect until today, the car starts perfect but when i drive it in will just die out if i dont keep my foot on the gas, or even when the car is sitting the car will start cold no problem but when i turn it off and back on it will just die out. It turns on an immediatly turns off , rpm's just drop. It has a new MSD 6al unit, can it be that??? fuel pump? i have no idea.....im stuck
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UnRegistered User
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No idea, but I will give a SC brother a bump to the front!
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Bill K. "I started out with nothin and I still got most of it left...." 83 911 SC Guards Red (now gone) And I sold a bunch of parts I hadn't installed yet. |
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Posts: 472
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thanks, still no ideas?
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Registered
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Sounds like a WUR problem, but it could be something else, so I wouldn't replace it without checking cold and warm fuel pressures with a set of CIS gauges like this: http://www.pelicanparts.com/catalog/shopcart/TOOL/POR_TOOL_CAT447_pg21.htm
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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Join Date: Apr 2003
Location: Simsbury, Ct.
Posts: 880
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Had the same issues with my SC. Turns out I had a vac. leak.
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JUAN '80SC Targa |
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is it normal for it just to turn off like that out of no where? if it is a valve leak.....because the car starts up fine, but right when i start driving it it dies out when i push in the clutch....if i keep my foot on the gas and shift gears it will stay on..its basically when i dont give gas and push in the clutch and the rpms drop and turns off
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Registered
Join Date: Apr 2003
Location: Simsbury, Ct.
Posts: 880
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Not a valve leak, a vaccum leak. As long as I gave it gas it would run fine, no gas , it would just die.
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JUAN '80SC Targa |
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Join Date: Apr 2003
Location: Simsbury, Ct.
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Vacuum, not vaccum, well.....you know what I mean
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JUAN '80SC Targa |
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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So, just to clarify ... if you cold start it and drive off do you have to keep your foot on the gas when you use the clutch?
Or is this problem only happening when the engine is warm?
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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yes i have to keep my foot on the gas from cold start...not when it is warm
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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You should check for vac leaks. They can come on suddenly. Do you have an airbox popoff valve? Check that.
Quite often this is WUR related, so checking control pressures is a good idea, as was mentioned. Also, check the screen on the top of the WUR. This can get clogged. If you raise the sensor plate while starting, what happens? Can you hear the injectors whine? Does it start from cold then?
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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 |
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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I'm confused here. Are chrisp and supercarrera82 the same person?
Anyway, there is a small screen on the top of the WUR below one of the fuel lines. This can clog, resulting in a lean condition. You may also have a clogged fuel filter. You need to go through the usuals: Check fuel pressures, check fuel flow and injector pattern, check spark, make sure your ignition parts are up to spec. Why not contact MSD too and see what they say? If this just sudenly came on once the new CD was installed, then maybe that's it. Can you temporarily hook up your old CD? Or is it shot?
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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 |
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Registered
Join Date: Jan 2007
Posts: 472
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might not be the smartest question...but what is WUR? location?meaning? sorry
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Registered
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Wur....
WUR : Warm-up regulator. Located on the driverside of the motor and mounted between intake manifolds #1 & #2. It would help if you get some refernce reading materials like Bentley or Haynes.
Tony |
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