1998 Monte Carlo surging

Now I've noticed other's have had this problem but didn't know if anyone has found out anything new here......

For a while now I've noticed that as I'm going up hill or really any bit of an incline she starts to almost rev up n down, making the RPM's bounce up and down like crazy it runs fine otherwise and if I hit the gas while it's doing this it stops? is it my transmission, or my injectors, or do I just need a tune up? no idea here and any info would definitely be appriciated

Did you ever find anything out about this? I have a 2001 that is doing the basic same thing. Surges ONLY when starting up hill and it shifts from overdrive to 3rd gear, will surge from around 1750 rpm to 2200 or so and do it about 6 - 8 times and then it is fine there after. I would be interested to find out how you fixed this. thanks much.

I have a very similar problem that happens when I lightly accelerate after the car warms up. Hope someone has a solution for this!

hey guys , i too have same. according to chevy its the tps sensor because it cant keep up with the flucuations as speed increases or decreases, but with mine i believe that its the trany solinoid. a chevy mechanic told me that the overdrive clutch sometimes slips. he said that chevy made them to slip a little bit( why......dunno ) try putting the car on a scanner and get live feed data and see what codes are stored and range flucuations. if no scanner ,ck at the terminal.the voltage range is as the throttle opens and closes. should be 1-5 volts at the connector. a scanner is te best way cus you can see fluctuations as you change speeds. mine is perfict, so its probably the solinoid for the od.
codes for tps can be found in chiltons , or alldata( both are free at the local library)
sorry for the spelling. good luck, Dave