rattle trap

Along with the service engine soon display, I get a sys appearing in the speedo display. the speedometer reads 0 at any speed, and the cruise control doesn't work. it also won't idle. This has been intermittent for a while, and is now constant. any ideas?

aklim

Vehicle Speed Sensor? Any way you can scan it to confirm if the ECM is seeing any speed reading?

rattle trap

I'm afraid I don't have the equipment to do that. I can only do basic maintenance.

aklim

Maybe an Autozone has a scanner? If you are keeping the car I'd get one. You will need it sooner or later.

rattle trap

Thanks, I'll be looking to buy an OBD1 scanner tonight.

aklim

Make sure you get a scanner and NOT a code reader

rattle trap

I ordered an OBD1 reader a few minutes ago. It was only $24, but you're saying that's not what I need. I didn't see any scanners for 1991 gm. Any suggestions on where to buy?

aklim

Snap on MT2500? What you got is a code reader. A $24 paperclip. I can do it with a paperclip if all it does is tell me what code is present.

rattle trap

thanks