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1998 Lexus GS 300 Repair Question


Topics covered: Catalytic converter, Gas, Gas pedal.
Mileage: No information provided.

Asked on March 19, 2010

1998 Lexus GS 300 car problems

1998 Lexus GS 300 Automatic 2000 miles

hello my lexus is shaking real bad when it sits for hours then i go to crank it it shakes or about ten min like a rollercoaster then when time to drive it it s=cuts o and then i i go 50to 60 miles and hour it makes a knocking ound like thump thump real loud and the speed drops and i have to put my feet all the way down to the gas pedal to pick up speed. i have been told and bought so many things and it is still doing the same thing fuel ilter was put on, sparkplugs, throttle position sensor now i was tod the cadallac converter and the timing is off. i really dont know please can u answer this question so people can stop guessing thank u
Avatar Asked by charron

Answer

Replied on March 21, 2010

have the catalytic convertor checked for blockages

Tiny Answered by Dave H (expert)
13,682 answers provided
Replied on April 3, 2010

I had the catalytic converter check and it was block but iam still having that shaking on the car when i crank up throughout the day some people say it might be a motor mount i really dont know this time what could it be please help again. thank u

Tiny Response from charron
1 question asked
Replied on April 4, 2010

have the motor/transmission mounts checked/replaced

Tiny Answered by Dave H (expert)
13,682 answers provided