Engine hard start

Several different things,but, more than likely bad injector cups.Will take several hours labor to replace/remove things to get to them all.Can clean out EGR valve.This will be temporary fix to keep you going.JMO

 

Its an electronic engine. Pushing the fuel pedal while cranking should have absolutely zero effect. At least in my experience on the dd60 series I've owned (ddecii's and ddec iv) the throttle positioning sensor is basically deactivated until the engine fires. In other words, the start position is directly controlled by the ecm, and you don't get control at the pedal until after it fires.

 

I thank we put a small hydraulic jack under the right rear of the cab and remove the guard from the left side. Then get to it from on top of the transmission. They are a common problem but if TPS setting helps it start I doubt that is the problem.

 

Parts not bad,its labor that costs.Guessing6 or 8 hours labor.This is a guess $800 to $1000. If this is the problem.See what mechanic diagnoses.

 

If you gotta ask you can't afford it. If you suspect leaky cups you can install a large o ring under the injector. Its a bandaid approach but will buy you some time. And can do it yourself, its very basic stuff to remove injectors.

 

Fuel pedal?

Desiels compress fuel until it fires. It is usually fed fuel by computer controlled injectors. Your fuel pedal might be sending signals by wire according to how much fuel you want now. But the computer in your engine decides what it gets.

If you got a failing fuel pump that needs a kick.... that would be one possibility.

 

Sounds like the check valve to me. 60 series are famous for this. Had the same problem on mine and it was a 50 cent O ring on the valve. The fuel pedal has nothing to do with it and is just a placebo that your treating like a carburetor. Personally I wouldn't let anyone touch it without replacing the check valve first unless obvious injector issues or fuel dilution in your oil.

 

You know I've heard that from many guys but in all the series 60s I've owned ive never had one go bad until last week. 1.3 million miles and same check valve and lines. Wish i could day the same for my cats. Every single caterpillar i have owned was constantly replacing the one at the bottom of the pump. Heck even had to on my dozer a handful of times.