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#1
06-26-2007, 09:41 AM
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AC Problem
AC works fine most of time. Every now and then the tach needle drops back to 0 (usually after a automatic transmission shift under fairly hard acceleration), when this happens the AC quits blowing cold air. You can pull over and shut the engine off...wait a few minutes and restart and it usually begins working again. Any ideas?
 Sorry about that...1985 300 DT
Last edited by jimbob; 06-27-2007 at 01:24 PM. 
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#2
06-26-2007, 10:31 AM
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year and model? [I just sold a 78 240D]
__________________
Kevin Arburn Overland Park, KS 1987 560SL
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#3
06-26-2007, 10:36 AM
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Need year and model. Some newer ones rely on the input from the tach. A zero RPM signal will shut down some a/c systems and the 0 RPM indicates engine shutdown.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K 90 Dodge D250 5.9 Cummins/5 speed. 400K Gone and still missed...1982 w123 300D, 1991 w124 300D
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