j30 idle problems

[heyhi]

so i cleaned the maf sensor and replaced the coolant temp sensor.I took it for a test ride for the first time in 6 mon.Drove it around for 5 min and it stalled twice .Kept driving it for another 10 min around the streets and it was perfect.Then I took it on the highway for 20 min and around 40 mph it hesitated(kind of kicked or it felt like there was no gas and after a second was fine) that happened about 10 times at 40 and 60 mph. When I got off the highway to make a u turn got to a stop sign ,hit the gas pedal to go and it hesitated. got back on the highway and hesitated a few times at 60. When I got back home and put it in park the idle was jumping between 800 and like 200 and stalled.
The thing is before I cleaned the maf sensor and replaces the tcs, when id turn the car on it would jump idle all over the place and sometimes stall. id actually hear the intake trying to suck air. after i did that stuff I started the car and it was fine.Let it run ten min and it was fine.

My temp gauge hasent worked for a long time what could that be. . Im gonna change the thermostat. I already changed the plugs. what else can i check for to fix this. thank you guys

 

[jackiemax11]

Wish I could help, I had an idle problem, but with different symptoms than yours. I DID have the crazy idling going on though and had my car stall on me a few times. It used to always jump between about 300 to 900 RPM's. It also hesistated quite often, My car is actually in repair now after having the timing belt slip for the second time. Well, it snapped the first time at 110k mi and bent some of the valves. Now its at 147k mi and just slipped. Whew!
Try checking fuel filter, PCV valve, choke thermostat, EGR valve, idle air control valve, idle speed control actuator, and throttle position sensor. good luck