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BlueOvalMan · 10-02-2019, 06:37 PM

On a recent trip our c9 shut down, no warning, no check engine, no stored codes. Been trying to diagnose as the nearest Cat service center that will work on a coach is six hours away and that will be quite a tow bill.
I have removed the coolant tank and related plumbing and wiring but I would have to lose half my body weight and grow two foot longer arms to do any work on it.
Has anyone successfully gained access to the HEUi pump to check fuel pressure and for possible replacement?

Tha_Rooster · 10-02-2019, 07:10 PM

Have you tried going under the bedroom floor for access?

Tha_Rooster · 10-02-2019, 07:14 PM

I guess you checked fuel filters? It’s my understanding they want start without oil pressure either?

BlueOvalMan · 10-02-2019, 07:28 PM

Can just barely see the pump with the floor removed, definitely can’t reach anything.

BlueOvalMan · 10-02-2019, 07:32 PM

[QUOTE=Tha_Rooster;4981285]I guess you checked fuel filters? It’s my understanding they want start without oil pressure either?[

Yes, changed and primed filters. Oil pressure is fine with engine cranking and also has tach signal. Air filter and exhaust have no restrictions. Next to check would be fuel pressure but just can’t get to the pump.