[W126 Coupe] another relay question

[Jonathan Hodgman]

John,

Could be your CO needs adjustment...or a temp sensor that's dropping 
off..hard to tell w/o having the car here.

Are you running 134 or R12? 134 never really gets all That cold down 
here..and proper conversions are difficult @ best.. I'd be curious as to 
the high and low side head pressures your mechanic was seeing when he 
set up your AC...that could be very telling.

Jonathan

johnfolger wrote:

>

> Recently my 88 560 has had a “flat spot” when starting. The engine can 

> die suddenly when gas applied. After a total warm up, it seems to go 

> away most of the time. This can get real “hairy” when pulling out into 

> traffic!

>

> One other niggling problem is my A/C. New compressor, I think all of 

> the servos have been checked or changed, but the system still does not 

> get, or stay really cold. Jonathan sent the relay, which got the 

> system back up, but I think I’m missing something. At the Sarasota 

> meet last week, Attila mentioned a mixing valve that sometimes needs 

> to be replaced. This is the system that when the A/C died, the heat 

> was on full. I assumed this was normal, but have now been told that my 

> heat may be on all of the time and that is the problem. Any ideas will 

> be appreciated.

>

> John

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