Hi guys, my 94 bonneville has a new problem, got gas other day went home, keft for an errend and car was shaking like it was missing or somthing, after a few minutes it smoothed out, ran fine. now it keeps doing it even when its warm, but will eventualy run fine, ses comes on. any ideas? or does this sound familiar?

Sounds like a misfire of sort..How are your spark plus and wires?

Go to Autozone and have them pull codes to see what is setting the SES. Probably a misfire.

If possible, get the car scanned, but I'm in agreement, sounds like a misfire. Pull the plugs and inspect them. Look for a black end. You may need to replace the wires, something I suggest if they have never been changed.

It'* a 1994, so it'* not OBD-II. Hopefully it'* OBD-I (as opposed to 1.5) and all you need is a paper clip. Anyone have a link to the paper clip trick for him?

It'* a 1.5 car. Likely Autozone won't be able to communicate with the pcm.

I'd start off checking out the plugs, wires and vacuum lines.

Mine did that for a while. I thought it was missing, but it turned out the thermostat was melted and the maf sensor was broke. I think the guy said the maf was the cause of the stutter. He did show me that it wasn't just on start. It always did it, just lessened after a min. Put it in neutral and get the Rpms high and steady, see if it sounds funny. Thats how he showed me.

Also one of my coil packs was cracked.