92 maxima se idle problem

[92maxpwer]

My 92 maxima se with 215000 miles one it has been idling very roughly lately. When i start it, it will run fine for about 10 seconds, then the rpms will drop down to around 400 then go back up. This is when it is in park. In In any gear besides P or N the rpms will drop and the car shuts off. Also when im driving, it will get up to about 2k rpms, and drop down to 1.5k, then go back up. It feels like someone is hitting the gas, and then the brake, and it wont go any faster. When i stomp on it, it will get up to 4-5.5k and either do the same thing or just shut off. It feels like the transmission is slipping, but that wouldnt explain the shutoffs. Please help!

[180fan]

check the timing yet?

[92maxpwer]

nope but its on the top of my list

[180fan]

post back what you find after checking the timing. usual suspects for somethin like that:

1. timing2. mafs3. tps4. cts5. injectors acting stupid6. vac although unless you got a savage hole somewhere don't really think this one's the one