[DML] Re: Engine running half rich half lean.

["Harold McElraft" <hmcelraft@xxxxxxx>]

Sounds like something is sticking or not working until a higher temp 
causes it to work. So, I would be suspect of any engine management 
sensor that is temperature activated and any related vacuum lines. 
Your case is interesting because many idle problems are after warm-
up, not at a cold start.

I would be careful to check that the air sensor plate is moving 
freely when cold. If the piston the sensor operates is sticking it 
will cause weird and sudden engine surges. Sometimes Marvel Mystery 
Oil in the fuel can help cure this. The idle motor may also be 
sticking, moving too slow or limited in range when cold.

Check and clean all electrical connections too, especially the 
connections on the frequency valve and on the fuel pressure 
regulator.

Harold McElraft - 3354


--- In dmcnews@xxxxxxxxxxxxxxx, Enid/Jeremiah 
<hispanicangeleyes@xxxx> wrote:
> This is a unique problem.  When I start my car now, the engine 
will run half lean and half rich.  The driver's side (4,5,6) all run 
rich (spark plugs are charcoal colored), and the passenger side 
(1,2,3) are lean.  The mixture screw has 



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