New to the forum...
My SC 400 has a wierd hesitation problem. Roughly every 7 or 8 days, the car goes through a wicked surging, stall, spuddering problem. When this happens, the trac idiot light comes on. After about 20 miles of driving when this car is bucking and being a major PITA, it settles out and resumes normal operation for the next several days. During the problem, turn the trac system off seems to do nothing.
What in the world could cause such a cyclic problem? It seems to be independent of environment changes (humidity/temperature). The trac comes on....maybe a throttle position sensor for the trac system? I can't find any minor/major vacuum leaks....just wondering if it is electrical and what is suspect.
I love this car, but would love it more if I could figure this out. Anyone else have this issue?
Thanks!!!
Tom