Today I pulled off my throttle body and intake plenum; when I replaced the TB I replaced it with another one I had because I made it shiny 
I'm fairly certain I've got all the vacuum hoses connected properly, and I don't hear a vacuum leak at all, but when I start the car now the idle rapidly fluctuates (like, BOUNCES) between 1500 & 2000 RPMs.
When I swapped TBs, I had to move over the TPS from the old TB, but the swapped one had the EGR valve on it so I left it. I'm wondering if this could be because now the TPS needs to be adjusted? Or is it due to a faulty EGR valve? I'm not getting a CEL either way, but I haven't actually driven the car, just started it up a few times now.
I'm thinking I'll just put the old TB back on as a matter of process of elimination, but if anyone has any thoughts as to what the deal is, feedback would be much appreciated.
I'm fairly certain I've got all the vacuum hoses connected properly, and I don't hear a vacuum leak at all, but when I start the car now the idle rapidly fluctuates (like, BOUNCES) between 1500 & 2000 RPMs.
When I swapped TBs, I had to move over the TPS from the old TB, but the swapped one had the EGR valve on it so I left it. I'm wondering if this could be because now the TPS needs to be adjusted? Or is it due to a faulty EGR valve? I'm not getting a CEL either way, but I haven't actually driven the car, just started it up a few times now.
I'm thinking I'll just put the old TB back on as a matter of process of elimination, but if anyone has any thoughts as to what the deal is, feedback would be much appreciated.