i have a 92 sc400... here's the problem...sometimes when i start my car it will start up as usual other times it will start lose rpm's and die i turn the key off depress the accellerator all the way to the floor and then it'll start up sometimes theres and slight smell coming from the car? other than that the cars cool
can yawl help me

 

hmm
my bro;s Sentra was like that (mayn sentras are like that)

umm
try cleaning out ur MAF..
or replacing it..
but clean it our first.. thats what ive heard.. iono how to clean it though.. im guessing just air.. but yea try that..

 

Try cleaning your throttle body.

 

See if you have any vacuum leaks.

Jonny

 

Probably the IAC Valve.