My 88 Iroc 350 TPI has what looks like two sensors in the front of the intake, one big and one small, which one is the temp sensor? Thanks for the help.

 

Coolant temp sensor is the one with 2 wires, yellow and black - right at the thermostat housing

 

Thanks, after I read further on, I found the info I needed. This is a great site, although this is my second third gen camaro, I will need some help with this one, just bought it, and it's a mess, been sitting for two years, barely started and ran, fuel looks like death[already drained it and changed the filter], and I retrieved four codes. Again, thanks for the help.