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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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Suddenly Lean - Left Stranded
Cold crank today was way lean - touching pedal resulted in popping, idle was low. I elevated my sensor plate ever so slightly and everything came back to life. Figured the plate was getting sticky and I could address it later.
Car continues to run like a champ for the next 20 or so minutes. Next thing I know the rpms drop while at a light. Spitting and popping ensue. I make it to the next turn off and pull into a parking lot. Running super lean again. This time moving the sensor plate does not work. So here I am. Stranded wondering what the issue could be. It runs, but it won't get me home. Thoughts? |
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02-27-2010, 09:15 AM
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Registered
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Maybe some more info? What year? Euro or not?
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A nose heavy airplane flies poorly, a tail heavy plane flies once. |
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02-27-2010, 09:31 AM
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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Sorry... using iPhone. 82 sc CIS.
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02-27-2010, 09:40 AM
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Registered
Join Date: Apr 2003
Location: Maitland, Florida
Posts: 892
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Does the fuel pump run if you have the ignition on and you lift the sensor plate?
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82 911SC Targa (05 Boxster S ) gone, but not forgotten 87 Suzuki GSXR-1100 1953 MG TD Mk II |
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02-27-2010, 10:00 AM
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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Solved! O2 sensor relay! So far so good. On my way home.
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02-27-2010, 10:07 AM
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grateful user
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the 02 relay gets pretty hot for some reason. They go out pretty often. Most guys dont know it and adjust mix accordingly.
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fully disassembled, blasted, customized and restored 75 targa with factory hard top, 993 style turbo ft fenders, steel flares, C2 bumpers and rockers, 82 3.0 sc 9.5/1 engine with PMS flywheel, 964 cams, flowed heads, ssi's short geared 915 w/lsd, polybronze, bilstein,working lambda, modified and highly tuned cis, tensioners, pop valve, backdated exhaust and heater, 2300 lbs. no bolt left untouched. 1970 911E. Nice car but needs a re-do. |
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02-27-2010, 10:53 AM
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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Back home now. Looks like my sig doesn't work when using my iPhone.
I was SOOOO close to leaving today without my bag of various relays. Glad I grabbed them ... and glad I had a spare. Thanks everyone.
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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02-27-2010, 10:58 AM
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Virginia Rocks!
Join Date: Oct 2003
Location: Just outside the beltway
Posts: 8,497
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Quote:
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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02-27-2010, 11:13 AM
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Paradigm Short Shifter
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How did you determine that was the problem? Shot in the dark kind of thing? You had the relay and thought, "I wonder"?
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02-27-2010, 11:26 AM
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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I always keep extra relays, cdi, coil, etc "just in case" something happens while on the road - I take a lot of long distance trips in it. They are easy to store and certainly worth the effort to have on hand.
Honestly I was in no mood to troubleshoot car issues today. But while I was waiting on the tow truck I called a local Pelican who suggested that I try swapping the 02 relay. It made sense b/c it controls the frequency valve and all of my CIS is in good order. I really didn't think that it could have been a sudden vacuum leak b/c I rebuilt the engine about 1 1/2 years ago and replaced nearly all of my hoses. Couldn't be the WUR b/c it would not fail suddenly - would be more incremental. I encourage those of you with later CIS cars to unplug your relay just to be familiar with the symptoms. It will still run but it will be rough.
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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02-27-2010, 11:41 AM
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*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
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Quote:
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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02-27-2010, 11:42 AM
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Virginia Rocks!
Join Date: Oct 2003
Location: Just outside the beltway
Posts: 8,497
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Someone suggested that mine was failing so I pulled the cover off and it looked good inside after 25 years in service. Maybe I'll order a second to have on hand.
I have a motronic 944 and don't leave home without the spare DME relay!
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Rosewood 1983 911 SC Targa | Black 1990 944 S2 | White 1980 BMW R65 | Past: Crystal 1986 944 na Guards Red is for the Unoriginal
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02-27-2010, 02:04 PM
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Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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sorry i missed your call. i was working on the house. tim was up helping.
man, you have had some issues lately. mine started doing the same thing friday. no idle at all in the morning but it was fine going home. this is one of the advantages of the earlier cis systems, no electrics to leave you stranded. as long as my fuel pump and cd work, im good to go. i keep the spares tucked awayy in fornt of the spare tire, wrapped in a towel. dont tell the wife, its one of her good ones.
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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03-01-2010, 05:03 AM
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1979 Porsche 911SC
75 Porsche 911
bike
1970 porsche E
Wavy
