ISX BASIC FUEL SYSTEM TEST KIT

[@downunderjuice]

Thank you so much for this video. I bought all the test equipment from one of your previous videos except the gauges. Got a fresh 2250 that we out of framed and now it's crank no start. So this will be a great help.

[@ENGINESHOPJOE]

Awesome. I'm glad the timing on this was a help. When you get her running let us know what was the culprit.

[@roz4747]

What was the issue?

[@downunderjuice]

@@roz4747 Been away from the shop. Have not got to it yet.

[@louisg8389]

Thanks so much for the info! I work on a fleet of 40 power units pretty much all ISX

[@TWR358]

Thank you so much for this info!

[@Commercialdieselrepair]

Good deal 👍🏽 I’m pretty sure it was me that asked about the kit 😅

[@bababa39]

Ive had my truck with a 2350 in 3 shops now. Trying to find the reason for measured not meeting commanded. On a dyno, its calling for about 36,000 but only getting about 27,000. When it does this...we get a 157 code and a de-rate. Its also stalled (on occasion) while idling for awhile. When it did that...it took about ten key-ons to get it to start again. They've tested injector returns, re-torqued tubes, fuel rail decay, high pressure test. All within spec...(mid-range) We found air coming from the Paccar separator. Installed a FASS and took off Paccar housing... thinking it would fix the air leak, any residual air, and any low fuel pressure side problems that we couldnt find. Still didnt work. Top of high pressure pump was rebuilt, new injectors, new actuator, new pressure sensor, new suction lines from tanks, new relief valve....still having issues. About only thing that hasnt been touched is the gear pump. I dont know where else to look at this point...but its killing me financially 😔

[@jacobbauza5951]

Anyway you could link some items for leak test? Injectors,relief valve ect. Thanks for all the informative videos. I’ve learned quite a bit from you sir

[@ENGINESHOPJOE]

Yes I will get that together and put up an exhaustive kit but hold your socks on the parts are pricey. Many times you can find alternate sources for the same fittings or hoses. The Cummins stuff is expensive but they warranty all their service tools. Used to be for Life but I haven't looked into that warranty coverage recently.

[@Bosbulls]

Thank you so much. I've going through Quick Serve Online and found the procedure for air in fuel checks with the orifice tool. But for the life of me, I don't understand how to use it. I have a QSC8.3 with a 559 fault code that I need to troubleshoot, and that is one of the tests to do. Can you please make a video or send me a link to one showing how to do that test.

[@ENGINESHOPJOE]

3678923-M10 X 1.00 X 13.5 metric fuel filter threaded plug- That is the plug and thread pitch that goes in that housing with the cummins PN at the beginning. 3824842 is the quick check fitting that is 10 mm thread but it is too short so you need to put some pipe in there to extend it. We use M10 Male to 1/8 pipe female then a 2 inch piece of 1/8th pipe and a pipe coupler and a quickcheck that is 1/8 pipe P/N3377244(3042618 old p/n). The test port is in the top of the fuel filter head. There are holes cast in the bracket that holds the fuel filter head. you can see the test plugs down in the holes. I dont remember the metric allen size for the plug. Put the fitting in the filter head and snap on your test hose then start her up and you are checking for air.

[@Bosbulls]

Thanks

[@jessemcclellan3685]

Man I’m gonna risk sounding like an idiot but I have a question? Should I connect the orfice line to the comp check on the gear pump or the comp check down by the metering and timing actuators on the underside?

[@ENGINESHOPJOE]

If you have two compucheck or test fittings at the top use the one in the back of the gear pump-it is pressure out( early engines did not have one there). The top fitting that faces you is suction or restriction so you dont want to put the dump line there or the engine will suck a bunch of air in and stall. in that case use the bottom one by the filter.- There are no dumb questions and the fact that you are doing this yourself proves you're intelligent.

[@tankeryankercruz7795]

Tku much appreciated

[@shanecusimano6178]

I have an ISX15 cm2350. I’m currently chasing down what I believe to be air getting into my fuel system. I replaced the gear pump and have a question on the pressure… After the pump was replaced I received my pressure gauge that I ordered so I didn’t check the pressures on the old pump. Here’s exactly what I did… With the key off I connected the gauge to the inlet side of the pressure filter then I turned the key on to see what the electric lift pump was doing it made 30 psi. I then started the engine and I got 180 psi then I revved the engine to 1300 rpm and it went to 210 psi once the engine returned to idle it was at 150 psi I repeated this process several times and got the same result.. Is all of that normal?

[@ENGINESHOPJOE]

You are good to go buddy! . It amazes me that the electric pump can push 30 psi but they do!

[@shanecusimano6178]

Thank you for the reply! I agree with you I was expecting to see 10 psi or so from the electric pump not 30.. You’re video series on fuel pressure has been very helpful thanks for taking the time to make these very informative videos.

[@CeilingFanMan99]

What’s ISX?

[@ENGINESHOPJOE]

ISX is a street name for a diesel engine Cummins engine company makes. Cummins actually calls it something completely different in engineering. When it first was released into production it was called the ISX or SIgnature engine. While engineers referred to it as the APEX. Think of a vehicle and then pickup or car would be (isx )what we called it and engineers would call it the Maserati (apex).

[@CeilingFanMan99]

@@ENGINESHOPJOE Thank you.