Strange issues with idle
Here's the deal, I just started having this problem recently. When I first start the car, it starts up just fine. I'll let it warm up for a few seconds, it idles fine, I put it into drive, and when I press the gas the first couple of times, it almost seems like the fuel is being cut off. It comes close to stalling. Then after I get going, this never happens again. Only on initial start-up after the car has been sitting overnight.
Also aside from that issue, my idle in park and neutral has suddenly changed recently. It was always around 600 RPM or so. Now, only after I have been driving (not on the first start-up of the day), when I put it back into park, it'll rev at 900 RPM for 10-20 seconds, and then go up to 1100 RPM for 10-20 seconds. It'll keep going back and forth as long as I leave the car in park......switch into drive, and it's normal. Freaky. This problem has been more recent and I don't believe it's the same problem as the hesitaion on initail start of the day.
Also, now, anytime that I start the car, it'll immediately jump to over 2000 RPMs before it drops right back down into the normal (higher than normal) range. This problem has coincided with the RPMs jumping from 900 to 1100. I never noticed the RPMs going this high on start-up before.
Here are things I've done recently:
TPS
IAC
plugs
wires
water pump
alternator
fuel filter
PCV valve
I'm going to clean my MAF sensor right now, but I don't really think that's the problem.
Any ideas???
Sorry this is in the general forum, but I don't know the exact problem, so I figured I'd cover all bases. Feel free to move it to the appropriate forum.