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Registered
Join Date: Jul 2005
Location: San Diego
Posts: 9
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My new baby is surging!
After 4 months of searching I found my dream car. '82 SC Coupe, 2 owner, 99% original, clean and pretty Bambus Beige. I love it and want to fix this problem. Between 1000 and 3000 rpm, in any gear, while holding the throttle steady, it surges rhythmically. The rhythm is slower at 1000 and gets faster as rpm increases to 3000. It may be happening above 3000 but could be so fast that I am not able to notice it. I installed a new o2 sensor but it did not change. Any suggestions?
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07-30-2005, 12:54 AM
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Join Date: Jul 2005
Posts: 1
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try resetting the o2 sensor. pull out the speedometer and push the reset button until it clicks. worked for me...
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07-30-2005, 09:02 PM
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Join Date: Jul 2005
Location: San Diego
Posts: 9
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Where you having similar symptoms before you reset the sensor? I thought the reset was only to start the o2 sensor reminder timer for the dash light.
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07-30-2005, 11:16 PM
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Join Date: Dec 2004
Location: Novato, CA
Posts: 3,064
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Quote:
What have you done to the car? The usual things? Valve adjust, plugs, timing, fuel filter etc.? If not, try a tuneup and visual inspection first. It's tough to make a guess without knowing anything about the car or its maintenance history... ianc
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BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 |
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07-30-2005, 11:30 PM
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Join Date: Jul 2005
Location: San Diego
Posts: 9
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The woman I bought the car from kept it very well maintained. Recent work included plugs, wires, cap, rotor, coil and a new MSD ignition module. She said she was having drivability issues up until the MSD unit, then it ran great. The dealer even took out the fuel tank and acid washed it thinking there was crud in it. I'm guessing she didn't notice the surging since she sold it soon after the work was done. It feels like a fuel issue to me when I drive it.
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07-30-2005, 11:48 PM
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Alii&Maui
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Take your air filter off and push the air flow sensor plate (round plate with a bent cast Aluminum arm) up. It should move smooth up and fall back down to it's rest position smooth too. Take off the rubber boot that goes from the air flow sensor to the throttle body. Get a can of carb cleaner and clean all that gunk off the throttle body, air flow sensor plate, and the air flow sensor boot. If yours was like mine it was caked with oil and gunk. Give it a try, it'll cost you a can of carb cleaner and some time. Do the cheap stuff first!
Oh yea post some pictures 
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1982 SC Coupe SCWDP#0087 KCSSL#0082 |
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07-31-2005, 10:10 AM
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Join Date: Jul 2005
Location: San Diego
Posts: 9
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Thanks for the advice. I just got back from a parts run and have fresh carb spray. I like trying the cheap stuff first also. Pictures coming soon.
Greg in San Diego |
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07-31-2005, 10:50 AM
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Join Date: May 2002
Location: Portland, Oregon
Posts: 12,667
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Go over to the "Tech Info Center" (look at top of this page). Check the CIS Trouble shooting chart.
Most likely your problem is a vaccum leak or mixture adjustment.
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Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
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07-31-2005, 11:22 AM
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911SC
