My truck seems to be working ok, but if I turn the key to the run position (not start it) I hear a rapid clicking from under the hood. Sounds like a solenoid, or like an injector, or a relay or something. Is this normal? What is it?

 

That might just be the fuel pump clicking. I can hear it under the cab in my 97.

 

Could be a number of things, I would have it checked out because it sounds like sometimes going out

 

lift pump and at this time of year you are also hearing the relays for the grid heater

 

Its a rapid non stop non pausing clicking. I think from under the cover on the top of the engine. I checked other forums, and found one thats describes exactly what I have. Alot of people chimed in with the same concerns. They concluded it is normal and it is two of the injectors firing away, and they do this for 3 to 4 minutes. I want to know if anyone here has this. Just turn the key to the run position(not start) (engine is off) and pop the hood, and listen at the top of the engine. Is it really normal?

 

now this I havent heard

 

I thought Drew heard it all I am searching for the other post. I found one of them.Link

 

OK, I found the other post. CLICK ME

 

interesting. that I didnt know.

now I know. I personaly havent heard this, but I will listen out for it the next time I have the hood up.

 

If all trucks don`t do it, then is it normal?