sarahberger1
Lexus LS rough cold start
Summary of the thread
A 2022 Lexus LS with 145,208 km experiences rough idling during cold starts, suspected to be due to fuel delivery issues. The problem is primarily during cold starts and improves once the engine warms up. A defective cold start injector is identified as the cause, and replacing it resolves the issue.
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4 comment(s)
sarahberger1 (community.author)
Injector testing? Was your experience only during cold starts, or did it continue after warm-up? How was it diagnosed?
alfredsilber1
Yes, primarily during cold starts. Once warmed up, the problem mostly disappeared. I'd get it to a workshop to diagnose, definitely sounds familiar. Turned out the injector was defective on mine.
sarahberger1 (community.author)
A defective injector it was! Your insights helped. A new injector plus labor cost 515€. The erratic cold starts are gone. Thanks!
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LEXUS
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LS
alfredsilber1
I had a similar issue with my LS! Hard starting and rough running when cold. Have you had the injectors tested?