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I never have ohmed my injectors. I figure that they can figure it out when it is being cleaned and tested. Even if you had an impedance bridge and even if it said the injector coil is A-OK, what is the point? It doesn't tell you what the condition of the rest of the injector is. On my other car, I had 5 good injectors and one dirty one. This is why I send my injectors off every few years for cleaning and testing. Sure, you can check it out electrically but that is not a very through test.
It isn't a thorough test either!
This thread is about electrical testing of injectors. I own an 87 vette, it has 239k miles on it, I have driven it every day since 1989 when I bought it. The original injectors had problems early on and were replaced and never checked again and the engine runs perfectly. From this experience, I make the assumtion that well designed injectors don't need cleaning every few years. Maybe, I'm just plain lucky too,...or....driving it everyday keeps the injectors clean.
It isn't a thorough test either!
This thread is about electrical testing of injectors. I own an 87 vette, it has 239k miles on it, I have driven it every day since 1989 when I bought it. The original injectors had problems early on and were replaced and never checked again and the engine runs perfectly. From this experience, I make the assumtion that well designed injectors don't need cleaning every few years. Maybe, I'm just plain lucky too,...or....driving it everyday keeps the injectors clean.
If you don't check, you don't know. My engine ran perfectly too. Jon found some issues including a collapsed filter basket. So either he was making it all up or the spray test did find some volume differences. Yet they all ran perfectly too. Why? Injectors don't suddenly get dirty and run badly. It is so gradual it is hard to notice.
I never have ohmed my injectors. I figure that they can figure it out when it is being cleaned and tested. Even if you had an impedance bridge and even if it said the injector coil is A-OK, what is the point? It doesn't tell you what the condition of the rest of the injector is. On my other car, I had 5 good injectors and one dirty one. This is why I send my injectors off every few years for cleaning and testing. Sure, you can check it out electrically but that is not a very through test.