throttle sensor

Hi I have an 260E M103 engine with no O2 sensor. Suffering from a low fluttering idle issue. The TPS may be an issue. Has anyone advice on how to test same. There are 3 pins. Apparently you can do a resistance test with a mulimeter. If throttle Tps is an issue, is it easy to replace Thanks in...

Hi I've had my old 1972 350sl renovated and it looks great. Only problem is that the engine runs really rough. Hesitates when pulling away, hesitates at about 1,500 revs and after about 200 miles after a service pretty much hesitates all the time. I've been told by the garage it needs a new...