need your experience/expertise on this one.
I've researched all I can on this in the archives.
My car consistently does the following:
When starting cold, it feels like it's not running on all cylinders.
Then after a second or two, the idle rpms come up, and the car runs
fine. After a few minutes, the car will begin to stumble again. This
has been intermittent for months. Now it is guaranteed to stumble
intermittently for a bit, and then go to a clear performance loss, and
vibration, like a cylinder has dropped out of the mix. This remains
the case until the car has sat for hours.
In an effort to remedy this, I have replaced the spark plugs (7 were
clean dry, and somewhat grey film, 1 had some carbon, but not loaded
up, or fouled), distributor caps, and rotors. The car ran GREAT for
about 24 hours, then back to the same old thing. (sat for 3 days
waiting for parts)
I checked all plug wires (didn't remove them though) to make sure the
cap ends were screwed on tight on both ends.
Now I'm starting to think that maybe the car has sludge in the gas
tank, and doesn't get starved until it's been moved for a bit, and
it's not really temp related.
Today, I'm going to start the car, and let it idle for a half an hour
or so, to see if it starts to stumble.
more info. started the car, carefully backed it out of the garage, and
let it sit running. After 20 minutes, went out, and it was
consistently dropping and recovering rpms. Had a bit of freeze spray,
and tried shooting both coils to cool them down. No change. tried
shooting the fuel distributor (spider on the top of the engine). no
change, but not much spray left.
I am now cooling the car down, and will try later to restart.
After the car cooled, I restarted, and it ran fine. Went for a ride,
and within 5 minutes, it was back to missing again. turned it off, and
restarted, still stumbling. So, maybe it IS temp related.
any other bright ideas?