Yeah, she starts up just fine, but lately the idle has been very rough in the beginning and relatively low at a stop. It's also happened that she ran generally rough and misfired quite a bit and it felt like she was choking when I hit the gas. After 2-3 mins everything fine. My O2 sensor is brand new, as well as all the regular tune up stuff. What gives?

Coolant temp sensor?

IAC maybe?

IAC has been SOAKED twice in carb cleaner and seafoam. While running and while not. How can I tell if the coolant temp is malfunctioning? Will it show up on my dash guage or is it separate? Can I check with a multimeter?

IAC has been SOAKED twice in carb cleaner and seafoam. While running and while not. How can I tell if the coolant temp is malfunctioning? Will it show up on my dash guage or is it separate? Can I check with a multimeter?

 

the CTS is a different sensor than the one that runs the gauge. It is specifically for the fuel injectoin computers fuel calculation info. I have rarely seen them go bad, usually, the contacts are corroded.

 

Honestly though, it sounds more like an IAC thing. Even though its been cleaned and soaked, doesn't mean its good;)

Ok, so how do we test it? Mine is doing the same thing. Runs rough when cold. Also does this hopping idle thing too: About halfway through the warmup cycle, the idle starts bouncing from about 1500 down to 800 then back up then down again for 5 or 6 times then the CEL comes on with code 24 and idles at 1100. Start driving down the road an it goes off. :confused:

Great confoozed is I.

Is the CTS inside the thermostat housing like Chilton says?

bump.

If it's like the SPFI, it's right under the t-stat. Right above no. 1 spark plug.