rexx
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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
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
maybe it could be your gas?
Gas?
Would that make it go into a 7-8 day cycle? I will admit, I put 89 and sometimes 87 into the tank when it should otherwise be hi-test... Or, do you think it is water related for the gas? I really hate to replace the ECM (or, whatever it is called for the Lexus)...but was hoping for a "oh, that happened to me" kind of response. Thanks for you input....I'm surprised you are the only response at this point on a message board like this. Couldn't hurt to try 93 octane for a month and see if that changes things....I'm desperate for answers at this point just short of bringing it to the dealer for a diagnosis. Had a similar problem with a Jeep Cherokee and it turned out to be a sticking idle control vavle.
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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
Sc 400 Trac Problem
in 92 - 00 Lexus SC300 / SC400
Posted
Where is the trac fuse located, I'll try it? This is different than turning the trac off with the switch? Turning trac off via the switch had no effect but I'll try the fuse. B)