2018 cat 272d2 c3.8

[Nige]

Also what I noticed, the prime pump is clicking and have the constant clicking noise, the sound is not changing like when is full, replaced with new pump and same thing.

Are you referring to the electric priming pump attached to the fuel filter.? If so it should run for about 30 seconds and then stop if you turn the key to ON and leave it there.

Yes, I can see the injectors codes and can change them, just wondering if it’s supposed to be more options, on the machine ecm I can see the parameters and change them for the engine no

That is a very basic engine ECM and AFAIK there are no customer-settable parameters in it apart from the injector E-Trim Codes.

 

[Marin1991]

Yes the transfer pump is new and make a constant clicking noise, I know that the pump should change the sound when the prime is full, just thinking about this, not sure how supposed to be.

 

[Nige]

I know that the pump should change the sound when the prime is full,

Not necessarily. If the key is turned to the ON position without starting the engine the priming pump should run for 30 seconds then turn off. That is what you should be looking for. The only function of that pump is to prime an empty fuel filter after servicing. There is what is known as a "feed pump" inside the HP fuel pump that is responsible for transferring fuel from the filter to the injection pump when the engine is running. See attached.

Have you done the simple stuff like checking the fuel lines for blockages.?
Does the fuel filter actually fill up with fuel when the priming pump runs.?

Question: Have you removed the HP fuel pump at any time while you have had the machine.?

 

[Marin1991]

No, I didn’t remove the fuel pump and doesn’t look like it was removed before, my thoughts right now is that the ecm drivers for the injectors fail and not opening the injectors but I don’t know how to test this.

 

[Nige]

my thoughts right now is that the ecm drivers for the injectors fail and not opening the injectors but I don’t know how to test this.

I think you are jumping too far ahead and getting fixated on one particular thing. Let the diagnostics run their course and the cause will become obvious.

No, I didn’t remove the fuel pump and doesn’t look like it was removed before,

That's good, because it has to be timed before being removed.

Again I ask.............
Have you done the simple stuff like checking the fuel lines for blockages.?
Does the fuel filter actually fill up with fuel when the priming pump runs.?

 

[Marin1991]

I checked the fuel lines, the water separator filter is full and is filling quick, I tried and bypass the water separator also, I removed a line from the rail and when cranking fuel is coming, I removed the return line from rail and fuel is coming also, i checked the wiring, the only thing remaining is the ecm and I don’t have from where to borrow one to test.

 

[Nige]

I suppose you have already tried spraying a whiff of starting fluid down the intake to see if the engine actually fires.?

The idea of dropping somewhere North of $4k on a new ECM based on what right now is a hunch doesn't give me a warm fuzzy feeling.

 

[Simon C]

There is no way you have already tested all the grounds to make sure on the computer, that none are above 100MV loss to battery Negative and tested the positives all over the machine for less than 0.3-0.5 Volts loss to battery positive. Because there is nothing coming out of an injector Driver cable at the injector does not prove the computer is gone, it only proves that that particular wire will need to be tested with a 5 amp load while disconected at the computer and disconnected at the injector end. If someone wants you to just buy and apply the new parts then just do it I guess. I wouldn't and don't think Nige would either. There was one post a while back that had the E-459 code that I believe ended up being a battery relay that was faulty. He wanted to get a new computer but found before that.
Hope you have dotted all the I's and crossed all the Tees.
Simon C

 

[Nige]

If someone wants you to just buy and apply the new parts then just do it I guess. I wouldn't and don't think Nige would either.

100% agree.

 

[Marin1991]

I’m thinking on the ECM because when I got the machine the 30amps big fuse for ECM was blown.
15 days spent on this

 

[Nige]

I’m thinking on the ECM because when I got the machine the 30amps big fuse for ECM was blown.

A blown fuse = a fried ECM. That's stretching the imagination a bit.
I assume that you replaced the fuse and now it is not blowing.?

 

[Marin1991]

Yes I replaced the fuse and it’s not blowing now

 

[Marin1991]

I’m thinking if the fuse for ecm was blown that can cause some damage on it but on the same time I can see the ecm on ET and all sensors are active no faults except the MAF sensor Whichi I think is bad.

 

[Nige]

no faults except the MAF sensor

You have the troublshooting procedure for it. Sort that out first would be my suggestion. You have to do that at some point anyway so why not do it now.? It may not cure the no start condition but if you fix the problem and the Code goes away then you know for sure that it is NOT the problem.

I’m thinking if the fuse for ecm was blown that can cause some damage on it but on the same time I can see the ecm on ET and all sensors are active

I suppose there is a possibility that an injector driver circuit inside the Engine ECM is fried but generally if a fuse blows and the problem is not fixed when a replacement fuse is installed it will also blow. YMMV.

I currently have lots of money riding on the E459 Event being the root of your problem.
Do some research into the Event just on this forum. It is more common than you think.

 

[Simon C]

I replaced the engine harness because was codes on multiple sensors and the easiest way to fix this was to just replace it, right now i checked the wires at the plug for injectors 4 pins 2 v another 4 nothing when unplugged, plug in all wires 2 v, whiles cranking using a led light tester no pulsing signal to the injectors. Right now I’m thinking that can be injectors drivers inside the ecm are bad and not sending the signal.

Just wanted you to know that if you read the Fuel System Opeeration ( KENR9884-23) to the end that Nige posted , the Injector Driver Circuit uses 110 volts to fire the injector.
You need a Scope to be able to read that at the high speed it is.
Trouble shooting these things can be intense. Hope you do as suggested by Nige.
Hope you do get it fixed.
Simon C

 

[Marin1991]

Thank you guys! Will update once I’ll have something new. Have a good weekend!

 

[Marin1991]

Hello everyone, found the problem. Dpf filter clogged. Any suggestions how to solve? New filter or delete?

 

[Nige]

There are specialist companies who will clean DPFs. Also IIRC Cat sell Reman ones.

 

[Marin1991]

What about delete for this engine?

 

[Nige]

Not legal in your market therefore no support on this forum.
Forum owners decision, not mine.