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New member

Re: C4.4 injector pump timing

No, we will send it to an trained specialist for this issue.
Thanks for your response!
Contributor

Re: C4.4 injector pump timing

I am just now reading your reply.  Somehow I missed it last month.  Sorry.  Did you get the engine going?  Previously, I borrowed the special CAT timing tool, and that was about three years ago, so I don't recall the specific TDC relation for the timing procedure. But using the tool gets you going in the right direction.  Hope everything turned out all right.

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New member

Re: C4.4 injector pump timing

The engine was completely overhauled. Was sent to us partially dis-assembled. The mech that rebuilt it (from what I hear is incompetent) did not ensure the pump was locked/mark for cam/crank TDC.

Do you know how to set pump at correct timing mark if engine is at tdc? I removed pump sensor, spun pump to where what I believe is the spot the sensor reads pump position. Now all I need to do is put all back together and hopefully it will fire up.
Contributor

Re: C4.4 injector pump timing

A special timing tool is necessary for that engine.  We run a few 6.6 engines which are the 6 cylinder version of the 4.4.  I'm guessing the gear to the high pressure fuel pump spun, thus causing a timing issue.  That gear is secured to the shaft with a press fit and bolt/washer; it is not keyed.  The cam position is read by the ECM via a sensor on the fuel pump.  If that gear has spun, then the ECM will read a timing issue between the cam and the crank.

 

The front cover must be removed, and if I recall right, the coolant must be drained to access the timing gear to utilize the timing tool.

New member

C4.4 injector pump timing

We have an portable air compressor powered by an Cat C4.4 Acert, I am in need of help on how to check the injector pump timing. I have fuel "to" injectors, but engine will not fire up. No smoke or any detected combustion. Also, if I use a multimeter on the injector leads will it read on my meter, or is it too fast to register? Any help will be greatly appreciated.
Thank You