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Kevin Weddle

Automobile ignition power transistor

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Of course a power transistor in a hot car can fail. It won't gradually go bad, it will just stop working completely. All it does is switch on then switch off. A new one will perform exactly the same.

Change the engine's air filter to get better performance.

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Has anbody ever heard of these going bad? I want to replace mine, but it's too expensive. I just want to know if I might get better performance with a brand new ignition power transistor?


I find it more likely that another part/component has gone bad. I would check the wiring and the connectors for oxidation and dirt/moist.
Some ignition modules have internal temperature protection and if the cooling of the module is not sufficient it reduces power and eventually shuts down. Check the surface between the module and the chassis for corrosion. Clean both surfaces (metal clean) and apply some new silicon grease to it. 

As AG says: a new air filter can increase the performance, and so can a set of new plugs and even new plug wires!

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Never had a problem. It's just that my car needs any benefit I can give it.


Can you elaborate, do you lack power, torque, smooth running, better mileage or do you just want be nice to the environment?

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