Yeah, have you tried the typical stuff? Spark plugs, wires, clean MAF, air filter, fuel filter? I would also try an A/F reset after doing the "tune-up" mentioned above. It's easy, just disconnect the negative battery terminal for 10 mins or so. Then when you start the engine, allow it to idle for 5 mins after it drops out of warm up idle. It should settle down around 1k rpm and if you have a tach, it will fluctuate slightly around 1k. The computer then starts a test that lasts 5 mins. After that 5 mins, the idle will drop to normal which is around 700 rpm.
Now, Freemind is probably right because it seems like your idle is not going up like it should when you have the brake on in gear. I would clean the IACV first. You might want to double check that front motor mount too. We have had issues with some aftermarket mounts 3 in 4 fail quickly after installation. Check it by using your finger to push in on the rubber part of the mount. If it is not firm, then the fluid has leaked out of the mount.
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