Injector Failure

[BIGNASTY]

Son has the twin to my truck. His mileage is approximately 120k mine is getting close to 190k He had an injector fail. I was wondering about mine. Is there a way of testing the injector as to wear. I assume that the failure is in the electronic part of the injector which is not much more than a coil or electromagnet when the ECM tells it to fire it activates and puts fuel in the cyl. As many times as the 04.5 does this something like 4 events per. is there a way to test the electronic portion of the injector to see if it is about to fail?

I believe in preventive maint not reactive maint. the distance to a place that a Cell Phone will work sometimes is a long walk much less to get something out there to tow it in.

Thanks

BIG

 

[JJPage]

is there a way to test the electronic portion of the injector to see if it is about to fail?

Pull the valve cover, you can ohm out the solenoids 1 at a time, should read .5 ohms or close to that. If higher/lower = failing, or open = failed.

 

[BIGNASTY]

Good deal, Im a worrywart and I hate to have NO CLUE as to the condition of things.

 

[cerberusiam]

Ohming the solenoids will just tell you what they say test at that particular time. They usually fail and intermit when they get warmed up, then it is almost impossible to find them unless it is throwing a code at the time. You need a DVOM that is accurate to +\- .5 ohms to test them though. It should not be over .5 ohms at the injector and not over 1 ohm thru the harness. Don't forget to check the harness also as they can have issues.

That is for the electrical part, you did not say what the actual failure was. A mechanical failure will almost never throw a code and can happen at any point depending on a lot of factors. Hard to predict. If you want to be safe and sure you will less likely have a problem, replace them with new, run 3 um filtration, multiple water filters, and additves all the time. About the only way to be safe as possible.

BTW, an 04.5 only has 2 constant events. The 3rd event is load controlled and is rarely active under 2500 rpms.

 

[BIGNASTY]

Thanks Cerb

It was the elect. Part of his injector that gave up. He had one of those black box's on it for awhile. He grew up and took it off when he came to MT. I will hear crap about it but I still think that's part of the problem once a black box is used the damage is done. Don't know if it could have hurt the elect. part of the injector. Anyway he took it to a Cummins dealer and had OEM NEW injectors put in, he said it has not ran as good as it does now for as long as he could remember.

 

[cerberusiam]

Maybe, maybe not. All depends on waht type of box it was. The typical pressure boxes won't extend the duty cycle of the injector and the extra rail pressures don't effect the solenoid becasue rail pressure is what lifts the pintle. 120k is not low to start seeing failures if the fuel it has run is questionable. Sinc eit is runnign much better after replacement I would hazard a guess its fuel quality has been less than adequate for a lot of miles. Best thing he can do now is get a FASS and\or add 3 um filtration and an extra water separator especially if he is MT now. The chnages n temp will by nature cause more issues with water. Fuel is probably better treated as you found out when going t TN but water is a bigger issue when temps vary widely.

 

[AH64ID]

The signal to open/close the injector is the same whether or not there is a black box, so that's probably not the issue.

As far as testing the only real way is to pull them and ship them off to be put on a Bosch test machine, but I can tell you that at 190K miles the chances are slim they will pass every test field even if they are working good.

200K miles out of CR injectors is nothing to complain about, swap them if you are worried.

Cerberusiam... did you see the Stage 1.5 BBi's for the MY04.5 spray angle?

 

[BIGNASTY]

Thanks for your thoughts on this, Im very much considering changing mine out and close to 200k on them I think I have gotten my use, and I really don't want to be on the side of the road.


Now to start the war, your choice of injectors and why.

 

[jgillott]

300K+ on ours. They should be swapped out also. I'd be curious what the highest mileage on original CR injectors has been. There has to be someone out there well over 500K I would think.

 

[seafish]

Thanks for your thoughts on this, Im very much considering changing mine out and close to 200k on them I think I have gotten my use, and I really don't want to be on the side of the road.


Now to start the war, your choice of injectors and why.

AH64ID and others have been quite happy with the BBI injectors that recently hit the aftermarket. They are Bosch injectors carefully hand rebuilt by BBI uner the guidance of Marco (Smarty fame) and a German engineer that used to work for Bosch. Do a quick search for BBI injectors or even pm AH64ID if he doesn't chime in here. They are what is going on my truck when it is time to swap.

 

[cerberusiam]

Quite a few have gotten over 500k on the injectors by running extr filters, additives and constant cruisng. Seldom are you going to find a set go over 300k with stock filtration and anything but running at a constant speed for hours on end. About 200k and the wear is starting to show in noise and the performance starts slipping. It may be quantifiable, it may not. When you put a good set in and drive THEN it becomes apparent.

The BBI's are about the top quality you will find but you pay for that extra QC. The BMS are the next step down in quality and have a better cost ratio than stock production injectors. Quite a few choices for new injectors out there now.