Random 302 Stalling/dying?! HELP

[White1987GT]

I have an 87 GT, I replaced all sparkplugs and use premium gas, once I start the car for the first time that day, it runs fine, but yesterday for example I got gas and started the car back up, the RPM's pulsed a little then the car died on it's own, this has happened before, any idea on what it could be? Please help!

 

[bentley429isBAC]

About 10000 things it could be. Give more info.

 

[Beasty306GT]

could be the vss sensor..but could be anything

 

[90mustangGT]

Well, sounds like either fuel or spark. Try to figure out which is missing.

 

[Mustang5L5]

Run the codes. About the only thing we can offer up as a starting point...otherwise we'll be here all day.

If it started after the plug change, perhaps a plug wire is loose, or the plug gap is incorrect. What plugs did ypu install? Hopefully not platinum.

You don't need premium gas if your timing is stock and engine is basically stock. Premium gas is not premium...that's a marketing term. You'll make more power on a stockish setup with 87 octane. Dont buy into the hype.