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Registered
Join Date: Jul 2001
Location: NJ
Posts: 857
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SC warm up issues
Start the car up she idles fine,[900] drive along shes fine for about 1/2 hr then idle goes down to 600 she stumbles and pops out the exhaust mainly on decel but loss of power. anyone?
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72 911 82 911 70 GTO  97 GT Ragtop 74/76 Jeep cj's |
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08-10-2010, 04:46 PM
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Free minder
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I would say WUR: warm up regulator. It looks like once the car is warmed up, the mixture becomes too lean. It should be rich at startup, then normal. In your case, it leans up too much.
Just my .02 cents.
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/ 2014 Cayenne platinum edition 2008 Benz C300 (wife’s) 2010 Honda Civic LX (daughter’s) |
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08-10-2010, 04:55 PM
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Registered
Join Date: Oct 2005
Location: Capistrano Beach, Ca.
Posts: 7,235
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Since the car appears to run well for a while then loses power, it could be fuel starvation from clogged fuel filter, clogged screen in tank, or dying fuel pump that shows up with increased demand for fuel. How old is the filter and pump? There was a recent thread where someone had similar problems and found that the pump was drawing too many amps--replaced the pump and all was good.
If you have a fuel gauge set, you can test the system pressure which could point to the pump but an amperage test, especially when the symptoms occur, could be more indicative. Another possibility could be a failing coil or some sensor that SC's have that I'm unfamiliar with but others may comment on. Do a bit of checking of the above suspects and report any results.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip |
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08-10-2010, 05:23 PM
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