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Registered User
Join Date: Aug 2014
Posts: 2
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CIS Surging when damp/wet conditions
Hi all, hope someone can help.
I have a 1980 911 SC, that has a problem with surging revs when it rains or in very damp conditions. Runs fine all other times. All the vac pipes have been checked and its also been checked for air leaks. Where would a good place to start be? Thanks. |
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08-18-2014, 09:50 PM
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ROW '78 911 Targa
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Distributor cap for moisture when it rains.
How old are the plug wires? Are they Covered in metal sheathing? Search for light show at night! Sent from my iPhone using Tapatalk
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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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08-18-2014, 10:46 PM
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Crotchety Old Bastard
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Next time it happens nudge the mixture screw toward lean. Humid warm air changes the AFR enough that a setting on the rich side can begin to oscillate at idle. If that's not it nudge it back where it was.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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08-19-2014, 03:54 AM
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Heinz
78 Porsche 911SC 3.0L, 3.3Turbo soon. 
