[DML] Re: Idle drops too fast
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[DML] Re: Idle drops too fast



Did this just start to happen or is it in conjunction with something 
you have done? It makes a difference in where to start looking.

If it just started you probably have a problem with the idle motor 
becoming sticky. You can remove the hose connecting it to the cold-
start valve and spray some Marvel Mystery Oil in it. Check the 
connections at the ignition coil - this is where the RPMs start to be 
monitored - also check the position of turn-on of the idle speed micro-
switch. There is an adjustment procedures somewhere in the manual but 
a quick look did not locate it - I just set it so that the switch 
turns on just as the throttle plates start to open. If the switch is 
set so the idle motor comes on too soon the idle motor is completely 
closed when the throttle plates close and the idle motor has a big 
adjustment to make to speed up the engine - which usually accounts for 
some lag. A sticky micro-switch (internally) can cause the same 
problem (replace it), poor connections can too (try disconnecting and 
reconnecting all connections on the idle speed motor, engine grounds, 
fuse, etc., to improve contact).

The engine has to be in good tune and free of vacuum leaks for the 
idle circuit to function properly - which means, you need to examine 
all the vacuum hoses, connections, etc., to see if the idle motor is 
being affected by some other issue.

Harold McElraft - 3354



--- In dmcnews@xxxxxxxxxxxxxxx, "painterdave72" <painterdave72@xxxx> 
wrote:
> Hey all.. just wondering if anyone has ever encountered their idle 
dropping 
> too fast when you let off the gas... MIne is doing that for some 
reason now .. it 
> goes down to like 500 rpms before it catchs itself and goes to 
normal idle.. I 
> put the spring on the throttle spool on the weakest setting.. but it 
still does it.. 
> any suggestions?? thanks..Dave.








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