RPM trouble

[Hoetz16]

I have an automatic 98 gs.I just got my plugs changed and a tune up and now all of a sudden my RPM's are wiered. It only reaches like 4500 RPM's and if shifts. is there sometihgn serious wrong or sometnign i can do to fix it.

 

[abstraction]

If it was shifting "normally" before the new plugs were done, and nothing else major was done, i'd check the gapping on your plugs. (what plugs did you get?). I know that gapping can affect the shift points on an auto by a a few hundred RPM, but i couldn't imagine it being as low as 4500... that seems really odd. something for you to check out anyway.

 

[EvuLFleA]

It will probably go away. If not reset your ECU. Check plug hap too. You should be around .042"