Northstar Engines and System Technical Discussion Discussion, 93 sts rough idle and fluttering under acceleration in Cadillac Engine Technical Discussion; hi guys today after driving my 93 sts for about 1.5-2 hrs and after just coming off the freeway i ...
93 sts rough idle and fluttering under acceleration
hi guys today after driving my 93 sts for about 1.5-2 hrs and after just coming off the freeway i switched my a/ c off. my sts than began to idle rough and to flutter under acceleration. the car has 120,000 miles. i than pulled over and allowed the vehicle to sit. after about 10-15 minutes i re started it ran normal i drove home about 40 minutes than once again it began to idle rough and flutter/miss under acceleration. the temperature remained normal although the entire time. i was worried about the head gasket but the temperature has remained normal so far. i will try the regular tune up first but any ideas would be greatly appreciated. i love my sts and need it to run awesome like it did before.before today it ran great, i 2nd gear de- carb it every so often. i already changed the air filter,pcv,and cleaned the throttle body a few months ago not the plugs or leads yet. thanks guys you all help keep my sts on the road
Automobile(s): '93 STS (sold), now looking for a CTS Wagon soon!!
Re: 93 sts rough idle and fluttering under acceleration
Also the EGR valve?
I was told, when you need to clean the injectors, to use injector cleaner..... 3 bottles, one every 1/3 tank before fill up. A hundred gallons of treated fuel usually does a good job. When it's time to clean them.