|
|
|
#1
|
|||
|
|||
Strange Idle Problem
The idle on my 81 380sl drops and then immediately rises every 15 seconds or so when the the car is in P or N when the heater is off. However, if I turn the heater on or put the car in gear the idle stays steady.
I replaced the idle control unit with a rebuilt one twice now and the idle control valve seems to be fine. So, I'm assuming it has something to do with the fact that the AC compressor comes on when the heater does, and the effect this has on the vacuum advance and/or changeover valve. But I'm not sure how to correct the problem or even diagnose it. So, I was hoping someone here could tell me what to look for. Thanks very much in advance.
__________________
1981 380SL Chassis: R107.045 |
#2
|
||||
|
||||
search auxillary air valve, or AAV that will get you started . I beleive yours is electronic so not sure it is adjustible
__________________
Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
#3
|
|||
|
|||
i cleaned that valve not too long ago, but it didn't help. Plus, if it were the valve, you'd think that it would cause the idle to oscillate the same way when the heater and compressor were on or off. Wouldn't you?
__________________
1981 380SL Chassis: R107.045 |
#4
|
||||
|
||||
you would think so , but AC compessor on requires more HP and increase in idle , so it is possible , the heater piece is the mystery
__________________
Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
Bookmarks |
|
|