93 lude idle to low

Hey,

sometimes i have trouble starting my car, it starts then dies immediately and then takes a while to start again.

Ive noticed that it might be the idleing that drops too low, if i accelerate a bit just over 1500rpm and then let go of the pedal, the rpm goes down to almost 0rpm and then comes up again, the lights fade a bit and all.

Can somebody please help me??
Thanks!

check your Oxygen sensor... could be bad and making you run too rich or too lean.... i'm leaning towards too rich.. bring it to a shop and have then check your engine codes... O2 should throw a code if I'm not mistaken