|
|
|
#1
|
|||
|
|||
High idle
79 450Sl when I fist start my 450Sl it will idle about 1800 rpm's - takes about 5 minutes for rpm's to drop to 1000 - help
Jim
__________________
Jim |
#2
|
||||
|
||||
You have a number of small vacuum leaks. Check all of the rubber components on the engine such as; aux air hoses, injector holder O rings, vacuum lines, intake manifold seals - anything that seals air out of the intake system - a long list of things to check.
__________________
I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k |
#3
|
||||
|
||||
Quote:
Check the Auxilliary Air Valve. It could be sticking open and that is same as having a vacuum leak. I had same high idle problem, but after cleaning AAV, idle is down to 700 in drive and 800 in neutral.
__________________
Graham 85 300D,72 350SL, 98 E320, Outback 2.5 |
#4
|
|||
|
|||
Unfortunately, that is somewhat the nature of the beast - the '79 has that wax pellet idle air control that is operated by the engine's water temperature, and it takes a few minutes for the water to get hot enough to operate the pellet. Make sure your engine thermostat is in good shape, and that the engine temperature gage shows the engine is warming up. I think the wax pellet starts operating the idle control when the engine temperature reaches 140 degrees.
__________________
Richard Wooldridge '01 ML320 '82 300D 4.3L V6/T700R4 conversion '82 380SL, '86 560SL engine/trans. installed '79 450SL, digital servo update '75 280C |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|