I started working at Cummins in 1997 In 1998 they sent me to school to get certified on this caps fuel system and ISC engine certification. In school they told us the same story 2 engineers got together and drew it on a cocktail napkin. I have the drawings. By the way, that weird shape tube that you're talking about your video is called a rate shape tube. It has an influence on fuel injection. That's why it's shaped like that.
@@ENGINESHOPJOE Thanks Joe! What would cause the low power when trying to climb a grade? My FL70 Freightliner won't go any faster than about 40mph to 55mph with the pedal to the floor...It has a ISC 8.3
@@TheBlkac1 Email me at FAULTCODEHELP@GMAIL.COM _ I need your engine serial number and on the ecm there is a plate that has ECM CODE. Send me that code. It might be something like J90152.07. It will start with letter(s) and then numbers. You can also reply with that if you don't want to email. I have more questions i can ask in email.
We bought a 2000 motorhome couple years ago that has an ISC with CAPS system. We’ve been refreshing the coach comfort and aesthetics stuff and doing corrective and preventative maintenance on the chassis systems. I’ve read that when a CAPS system is replaced, you should also replace the transient protection device. Question - At 24 years young, is there any justification in replacing the transient device as a preventative maintenance action?
The transient suppressor is actually a schottky Diode. It's job is to send to ground the inductive kickback from the injection control valve coil. I only saw 3 failed in the about 12 years that system was common place-in its day if you will. The transient suppressor was put in to protect the ecm driver (power transistor) that fires the injection control valve. I did have to replace two ecms( of the three suppressor failures) after that diode was failed. One just would not run. The second ran but it was obvious there was some problem as it missed and then overfueled as it idled. The third the engine shut off and would not start. It was a head scratcher and finally I changed that and it ran fine. I think the third shorted dead to ground and the other two burned open. The diode is in a copper colored case like a small cigarette with two wires. Now to your question " When does or will my diode fail??" and I know this is not a good answer so I gave you enough information to make an informed decision. Last it is not considered to be a maintenance part. The most important thing you can do is make sure all the electrical grounds are in good shape and your battery cable connections clean and tight.
Yes. it is a diagnostic port to measure gear pump pressure up to the high pressure pumping elements. Under 35 psi there it wont start. 45 PSI she will fire if the rest of the pump is working correctly. typical pressure there at idle is 135 and reved up around 185 PSI. The gear pump module has a built in regulator that controls that.
been having an issue with my dads iveco acco truck. starts perfect, runs great, but it won't rev out over 1700rpm even in gear. Has no fault codes on cummins insite either. It's proving very hard to diagnose but I believe the issue is fuel related. it's just not getting that extra 10,000psi to give it power. It has this CAPS fuel injection system but I'm only an apprentice auto sparky and I don't know where to start... I feel like that main pressure control solenoid may be the cause? Any ideas?
Do you know how to do a data log "all parameters" and log it and save it? Then do you know how to capture an ecm image of the engine and export it. If you can do the above road test the truck with insite hooked up and data logging. run through the gears and full throttle too until it wont rev any more. You have to log all parameters when you do this. Then email me those files and i will see what i think. In most cases if the pump has a problem severe enough to limit rpm and or power it will log some fault. So Im not sure what is going on yet. You can email me those files at faultcodehelp@gmail.com Dont start changing pump parts until we know what is going on, especially if it starts and runs good.
@@ENGINESHOPJOE will do, thanks for that info. I'll have to borrow a laptop again and run through a driving data log test. If you could have a look that would be awesome. I agree, I don't want to replace anything yet especially since the PCV is $1500- $2500.
Most likely no. You probably have a common rail system like the L9's do today. Again I can only be sure if you give me your engine 8 digit serial number. But I would be more than surprised if it was a caps. system.
I started working at Cummins in 1997 In 1998 they sent me to school to get certified on this caps fuel system and ISC engine certification. In school they told us the same story 2 engineers got together and drew it on a cocktail napkin. I have the drawings.
By the way, that weird shape tube that you're talking about your video is called a rate shape tube. It has an influence on fuel injection. That's why it's shaped like that.
I have that photo of the napkin someplace too... cool stuff. Yes you are correct - rate shape tube and thanks!
Great information about this pump...I wish that they wasn't so expensive. A rebuilt one is just as much as a brand new one...
Yes I agree They are pricey. As time goes on and there are less and less in the engine population so the price goes up.
@@ENGINESHOPJOE Thanks Joe! What would cause the low power when trying to climb a grade? My FL70 Freightliner won't go any faster than about 40mph to 55mph with the pedal to the floor...It has a ISC 8.3
@@TheBlkac1 Email me at FAULTCODEHELP@GMAIL.COM _ I need your engine serial number and on the ecm there is a plate that has ECM CODE. Send me that code.
It might be something like J90152.07. It will start with letter(s) and then numbers. You can also reply with that if you don't want to email.
I have more questions i can ask in email.
@@TheBlkac1 I need to know the engine serial number and the ecm code which is on a tag on the ecm
We bought a 2000 motorhome couple years ago that has an ISC with CAPS system. We’ve been refreshing the coach comfort and aesthetics stuff and doing corrective and preventative maintenance on the chassis systems. I’ve read that when a CAPS system is replaced, you should also replace the transient protection device. Question - At 24 years young, is there any justification in replacing the transient device as a preventative maintenance action?
The transient suppressor is actually a schottky Diode. It's job is to send to ground the inductive kickback from the injection control valve coil. I only saw 3 failed in the about 12 years that system was common place-in its day if you will. The transient suppressor was put in to protect the ecm driver (power transistor) that fires the injection control valve. I did have to replace two ecms( of the three suppressor failures) after that diode was failed. One just would not run. The second ran but it was obvious there was some problem as it missed and then overfueled as it idled. The third the engine shut off and would not start. It was a head scratcher and finally I changed that and it ran fine. I think the third shorted dead to ground and the other two burned open. The diode is in a copper colored case like a small cigarette with two wires. Now to your question " When does or will my diode fail??" and I know this is not a good answer so I gave you enough information to make an informed decision. Last it is not considered to be a maintenance part.
The most important thing you can do is make sure all the electrical grounds are in good shape and your battery cable connections clean and tight.
you didnt mention the diagnostic fitting #11. is tha a port to measure pressure out of the gear pump?
Yes. it is a diagnostic port to measure gear pump pressure up to the high pressure pumping elements. Under 35 psi there it wont start.
45 PSI she will fire if the rest of the pump is working correctly. typical pressure there at idle is 135 and reved up around 185 PSI. The gear pump module has a built in regulator that controls that.
been having an issue with my dads iveco acco truck. starts perfect, runs great, but it won't rev out over 1700rpm even in gear. Has no fault codes on cummins insite either. It's proving very hard to diagnose but I believe the issue is fuel related. it's just not getting that extra 10,000psi to give it power. It has this CAPS fuel injection system but I'm only an apprentice auto sparky and I don't know where to start... I feel like that main pressure control solenoid may be the cause? Any ideas?
Do you know how to do a data log "all parameters" and log it and save it? Then do you know how to capture an ecm image of the engine and export it. If you can do the above road test the truck with insite hooked up and data logging. run through the gears and full throttle too until it wont rev any more. You have to log all parameters when you do this. Then email me those files and i will see what i think. In most cases if the pump has a problem severe enough to limit rpm and or power it will log some fault. So Im not sure what is going on yet. You can email me those files at faultcodehelp@gmail.com
Dont start changing pump parts until we know what is going on, especially if it starts and runs good.
@@ENGINESHOPJOE will do, thanks for that info. I'll have to borrow a laptop again and run through a driving data log test.
If you could have a look that would be awesome.
I agree, I don't want to replace anything yet especially since the PCV is $1500- $2500.
These pumps always seemed to break in the same way the drive coupler from the gear pump to the distribution head would tear up the shaft
They all sort of had similar failures. The most common problem I saw was injection control valve related faults.
@@ENGINESHOPJOE yea I never ran into a lot of the control valve failing I did a few….did a lot of the fuel temp sensor on the accumulator block
where can I buy parts for this pump? I looking for the distributor.
Cummins or aftermarket fuel pump shops
I have a 2014 ISL 8.9L do these have CAPS pumps too.
Most likely no. You probably have a common rail system like the L9's do today. Again I can only be sure if you give me your engine 8 digit serial number. But I would be more than surprised if it was a caps. system.