No cold start OBS 7.3

[greenskeeper]

The current load of the GPs brings down the voltage some. 11V is not that low. They key is - check the voltage on each big terminal WHILE the GPs are running. If the DIFFERENCE between them is more than 0.3V, the relay needs replaced.

This.

Sounds like you've got the GPR system working properly and shouldn't have trouble starting a low temps. 5w-40 oil also helps tremendously.

 

[m67tang]

Hope to check it when I get home from work today.

 

[m67tang]

19f right now. Cycled glow plugs 1 time- 2 minutes. Fired right up first try! Sounds kinda grumpy but it’s running. No bucking. Just cold. It’s filled with Amsoil 15-40 AME synthetic oil.

 

[madpogue]

Good to hear. If you're gonna spend the $$$ on Amsoil, you might as well go for the 5W-40; it'll make for less grumpy cold starts.

 

[m67tang]

Yeah, I wasn’t sure about that for the 7.3 obs PSD. This is oil left from my 7.3 IDI. Next time I can go lower viscosity oil.

Thanks for all the help on this issue.
And fast replies.
Still gonna get a stancor relay too.

 

[greenskeeper]

Another cheap and easy mod is to add an LED light in the cab wired to the GP side of the relay. That way you can tell when the relay is energized.

 

[m67tang]

Ooooh, I like that one too. Gonna go good with the stancor relay.

Is that hooked to the large ring terminal output ?

 

[greenskeeper]

Ooooh, I like that one too. Gonna go good with the stancor relay.

Is that hooked to the large ring terminal output ?

yes the large terminal on the side going to the glow plugs. I put a fuse in-line as close to the relay as possible (1 amp) since it's only powering the LED in the cab.

 

[madpogue]

Edit - disregard