single slammer starts up rough

[Options13]

In the morning my car starts up fine, goes right up to 2k, then lowers down to about 900rpms..
but when i drive somewhere close, and the engine is somewhat warm, and i turn it off for about 20 minutes then start it back up, it kind of stumbles for a couple seconds, sounding like its about to die.. but it only last for like 1 second, then it goes to normal...
could it be my timing? it doesn't backfire or anything
i might buy a new dist cap.. i wonder if thats it...? hmmm

[s13dan]

If it only lasts a second, I wouldn't even worry about it.

[s13 @ fullboost]

mine did that but then went away on its own so it not anything critical so don't stress man =]

[kevtrinh]

coolant temperature sensor may be going out...

[Options13]

is the coolant temp sensor the sensor with the yellow plug on top of the intake manifold? the plastic thing...?

because it just got worse, enstead of it lasting 1 second, the car almost dies every time now, but then after 3 seconds of so it will idle fine