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90 Ls400 Running Rough


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Just had starter replaced after 245k miles! Lexus took several extra days to complete the job since they apparently had the wrong starter. Engine was running smooth as ever before. Now is running rough - seems like something is not firing properly. Sent it back. Lexus cleaned the TP sensor. This has improved things a bit but still is just not right.

What else could they have disturbed when replacing the starter that would cause this?


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One of the things I have noticed is that the coils have not been replaced on many of these cars. They'll cause this kind of problem and they are relatively inexpensive and easy to replace (unlike that starter!)

The early '90's cars also had problems with leaking capacitors in the ECM's. Find a local rebuilder that can inspect/test yours.

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