VS ECU noise

[HGK]

Hi guys VS V6 won't start replaced plugs, leads, dfi, cas, coils are a few months old. When I connect the battery I don't here the noise I usually hear. Is that the ECU making that noise? Should I take the ECU out and send it to someone? Somewhere in another post it said check the ECU earths. Any thoughts appreciated

 

[Grimes]

If you’re referring to the short burst of electrical whining you hear when the ignition is turned on before the engine cranks, that’s the fuel pump. If that sound is absent and your car won’t start, start running through fault finding on the fuel pump circuits.

 

[EYY]

Hi guys VS V6 won't start replaced plugs, leads, dfi, cas, coils are a few months old. When I connect the battery I don't here the noise I usually hear. Is that the ECU making that noise? Should I take the ECU out and send it to someone? Somewhere in another post it said check the ECU earths. Any thoughts appreciated

You’re talking about the iac in the throttle body, I’m sure.

 

[HGK]

If you’re referring to the short burst of electrical whining you hear when the ignition is turned on before the engine cranks, that’s the fuel pump. If that sound is absent and your car won’t start, start running through fault finding on the fuel pump circuits.

Thanks Grimes, yes it is that sound

 

[HGK]

You’re talking about the iac in the throttle body, I’m sure.

Thanks EYY, I better check it out.

 

[HGK]

I took out the fuel pump and gave it 12volts and it worked. I noticed the screen filter has a split in it so I suppose that is a good enough reason to get a new pump. Assuming the pump is the original I suppose that is also a good enough reason to get a new one? This pump is very quiet ( I never hear it, except when I reconnect the battery. Is that The fuel pump?) and if original has lasted a long time. does anyone know what brand it would be? Or can someone recommend a brand that I should get? Even before I get a new pump, like Grimes said, I'm going to need to check the fuel pump circuit. All fuses and relays tested ok. Fuses are easy of course but with relays I don't know if I need a certain ohms reading to be sure if they are reliable. Thanks for any help.

 

[Lex]

relays I don't know

Relays have part numbers. Replace relay with the same part number.

 

[Grimes]

I took out the fuel pump and gave it 12volts and it worked. I noticed the screen filter has a split in it so I suppose that is a good enough reason to get a new pump. Assuming the pump is the original I suppose that is also a good enough reason to get a new one? This pump is very quiet ( I never hear it, except when I reconnect the battery. Is that The fuel pump?) and if original has lasted a long time. does anyone know what brand it would be? Or can someone recommend a brand that I should get? Even before I get a new pump, like Grimes said, I'm going to need to check the fuel pump circuit. All fuses and relays tested ok. Fuses are easy of course but with relays I don't know if I need a certain ohms reading to be sure if they are reliable. Thanks for any help.

 

[HGK]

Thanks very much Grimes. I can go through that circuit now. You've got my enthusiasm back up again, I'm looking forward to having another go. Much appreciated

 

[HGK]

Relays have part numbers. Replace relay with the same part number.

Thanks Lex, I'll research those part numbers