The Humvee takes off on its own like if someone flipped the "After Burner" switch.

[Mogman]

@MarkM maybe you'll like to try an ex-jet engine and see what it does (if it doesn't dry up your tiny fuel tank too quickly first) but..who knows!

I darn sure would, do you know where I can get one cheap?

 

[MarkM]

@MarkM maybe you'll like to try an ex-jet engine and see what it does (if it doesn't dry up your tiny fuel tank too quickly first) but..who knows!

A RATO unit would be better as it doesn't have to take time to spin up like a turbine. It won't last long but it would be one hell of a ride.

Mark

 

[Dieselmeister]

I had a bad cold advance thermostat, shorting out intermittently, causing the pump to advance. It accelerated the truck, but not like a rocket. Definitely a strange feeling though. Disconnect the cold advance wire on your pump, and see if the problem goes away.

 

[MarkM]

I had a bad cold advance thermostat, shorting out intermittently, causing the pump to advance. It accelerated the truck, but not like a rocket. Definitely a strange feeling though. Disconnect the cold advance wire on your pump, and see if the problem goes away.

That's what I was thinking. Quick change out it That's it.

Mark

 

[TOBASH]

Diesel runaway is a serious consideration. Did you bypass EGR? Bad EGR? Oil entering intake air will combust like injected Diesel fuel. It is called a “runaway engine”.

You best ensure this is not occurring. It will blow up your engine and turning the ignition off will do nothing.

 

[Tiwaz]

it was a defective Gas pump, the shaft/pin that makes the pump work was broken. Replaced it with a electric pump from the auto parts store, runs just fine.

 

[Retiredwarhorses]

Sounds like the armature is sticking inside the pump, ive seen similar….I strongly recommend not driving it till the pump is replaced.

 

[NDT]

Steve you are talking about the injection pump right? I see no way the fuel pump could cause this.

 

[Retiredwarhorses]

Steve you are talking about the injection pump right? I see no way the fuel pump could cause this.

Yes….

 

[TNDRIVER]

Sounds like the armature is sticking inside the pump, ive seen similar….I strongly recommend not driving it till the pump is replaced.

Second choice is a leaking turbocharger, oil is puddling in the intake to the point it is being pulled into the engine. Should this be the case the exhaust would look like rolling coal. A look on the intake side of the intake manifold should show black oil. Just my 2 cents.