lara_ghost1
Lexus LX cold start injector issue
Summary of the thread
A 2004 Lexus LX was experiencing rough running and starting difficulties when cold, suspected to be due to a faulty cold start injector. Possible causes included insufficient fuel spray or injector leakage. While fuel injector cleaner was considered, the issue was confirmed by a workshop to be a defective cold start injector, which was replaced, resolving the problem.
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4 comment(s)
lara_ghost1 (community.author)
Yeah, I was thinking it's the cold start injector, as in, the one specifically for cold starts. But I'm not sure how to test it. And about injector cleaner, can that actually help, or is it just snake oil? What do you reckon?
barbaracrystal82
Okay, if it's the actual cold start injector, those can be tricky. If it's faulty, it might not be spraying enough fuel, causing the poor starting and rough running. Or, it could be leaking, flooding the engine. Cleaner can sometimes help, but honestly, with those symptoms, and that mileage (175892 km!), it might be best to get it checked by a shop. Could be a bad injector valve.
lara_ghost1 (community.author)
I suspected as much. Took it to a workshop, and they confirmed the cold start injector was kaput. Cost me 515€ to replace, but she's running sweet as now!
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LEXUS
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LX
barbaracrystal82
Rough running and hard starts sound like a fuel delivery issue, for sure. When you say "cold start injector", do you mean the actual cold start injector, or just one of the regular fuel injectors acting up? Have you tried any fuel injector cleaner in the fuel rail? It might just be a blockage...