Sprinter injector leak off test. Apr 21, 2013 · Thanks for the reply.

Sprinter injector leak off test. 0 CRD, also Sprinter Van.

Sprinter injector leak off test. Aug 8, 2011 · The injector leak off test is useful when diagnosing starting issues at cranking speeds. I changed the 3 o-rings on the pressure control solenoid on the back of the fuel rail (this is an 02 with removal solenoid) and still can't get it to start. I was able to get the vehicle started then changing a bunch of parts on the fuel system (HPFP, filter, rail and its sensors, and swapping out Diesel fuel injector leak off test, Mercedes Benz OM642 V6, 2008 Jeep Grand Cherokee 3. If no fuel is evident, do your injector leak off test again. In some cases, the engine can come to a complete stop. These injectors passed the test. My Sprinter is a 2006 T1N with 366,000 miles. At 24,000 miles, unless it has had really crap fuel, it is less likely to have worn out injectors. I have been having some hard starting issues and I think this injector is to blame. Same goes for a smooth running test. Sep 5, 2013 · By the way there is no chuffing from the injector seals indicating the beginnings of black death - believe me I know what that sounds and looks like. Aug 8, 2011 · A leak off test (as far as I can tell) is only good for two (very important) things: 1. I'm coming up on 200k miles, and haven't noticed any smells or had any engine trouble. Aug 6, 2017 · Was not leaking at all until I removed them to perform a leak-back test. The black death deposits can be cleaned with "brake cleaner" and paper towels to act like a wick. That could be multiple injectors leaking "sort of" badly (this happened to me), or one injector leaking really badly, like you have. Unburnt fuel washing down the cylinder walls will cause an early demise of your engine. Aug 8, 2011 · Excessive leak back is a result of multiple things, wear being one of them, however things like a dirty nozzle, clogged nozzle, and dirty / sticking needle will also cause excessive leak back. 7. Aug 5, 2020 · I preformed a leak off test on a cold engine first, just for reference before doing the same test on a hot engine. Then you could remove the 1 injector and have a look with a camera. Mercedes Sprinter Common Rail Diesel Injector Leak Jul 15, 2013 · Injector leak off test revealed injector no. 1' sections of 1/4 ID clear tubing (on all six injectors) and pinched off the return lines near the T back into the inlet side of fuel filter. Today after reading about the injector leak test, I decided to try it. 1 leaking far too much fuel, all the others were fine. first off, quite a bit of fuel into the 'test tubes' just turning on the key and waiting for the glow plugs. Check Engine Light. May 8, 2024 · Hello NCV3 owners, I started a thread some months ago proclaiming that 90% of the time a crank and no start issue can be linked to a faulty injector. Feb 21, 2024 · Sprinter Starting Woes: DIY Injector Leak Off Test Tutorial!"Description:In this comprehensive tutorial, I guide you through the process of performing a leak Jul 22, 2020 · Is the leak-off test really that definitive of a test in diagnosing injectors and justifying a full replacement? Also, I am getting a fuel leak somewhere above the oil tank. Sep 10, 2016 · To add to my previous post: the excessive fuel leaking off will drop the rail pressure. The injectors should have the leak off measuring tubing on them to prevent any fuel spillage. I have read some writeups on changing Feb 5, 2023 · A leak off test may find bad injectors, but there are many more ways for them to be bad that a leak off test will not detect. Basically, if you try to cheap out on an old Sprinter, the result may be you have an old Sprinter with a blown engine that is worth zero. 5" of fuel #3- 1" of fuel #4- less than 1" of fuel #5- 1-3/4" of fuel Feb 27, 2024 · Just like the leak off test, which can possibly find a bad one but cannot guarantee that they are good. Your Mercedes-Benz Sprinter's check engine light may illuminate if your Jan 20, 2012 · After testing all five injectors and finding all within tolerance, I reinstalled the Injector return line only to find that now injectors 1 and 5 were leaking from the top connection to the return line. Feb 7, 2024 · A Sprinter Mechanic told me I had some black death on Injector 2, here's a photo of the injectors and the results of the leak-off test - the lines on the tubes are one and two inches from the base. 1" of fuel #2- 1. Oct 15, 2023 · A "cranking test," therefore, is 100% invalid for testing the Y74, for the om648 (cannot think of why it would be any different for the om647 Sprinter engines). Regards Apr 11, 2021 · The leak down was done exactly as described in the leak-down test write up and exactly for 10 seconds as timed by the app on my phone. Apr 4, 2012 · Black Death is not from a leaking injector, rather from a leaking seal on the injector body where it contacts the head. New injector installed, van running fine. As far as the glow plugs, I do have concerns about them as well and have a new set ready to be installed. Sep 22, 2017 · alright its been raining off and on all day, so i got a chance to do the injector leak-off test with an issue in the process. If the copper seals and bolts were reused, would the injector leak off show a bad injector and/or a bad seal/bolt? Jul 16, 2013 · The injector leak off line needs to be removed from the injectors, then pinched shut upstream of number 5 injector. Here is a pic of the new injector return line and the Oct 15, 2024 · Another back to the basics test you could perform since you can't get a mechanical compression test is the injector leak off test. Apr 7, 2021 · Your injectors look far too clean to have had fuel leaking and drying onto them. 3 others had about a half inch of fuel and one had almost none. I believe that the 10 year old o-rings did not appreciate being removed from their bores. Then and only then, measure the solenoid fuel quantity. For the test to be valid you must have proper feed pressure and the rail solenoid needs to have its electrical connector plugged in. As preventative maintenance to identify injectors that are wearing out and should be replaced sooner rather than later. May 21, 2022 · In this video, Bill & Mike show you how to perform a Fuel Injector Leak-Off test using Miller Special Tools 9545. If you're not noticing a heavy residue on them, I'd keep looking for that leak. A weak Y74 will dump fuel past if under high pressure, and it's This that MB specifically concerns as being a relevant test, not lower fuel pressures from cranking. I've just had an injector out, disassembled and cleaned the nozzle / needle assembly, and my leak back from the cleaned injector is about 50% that of the Feb 28, 2024 · so i ended up doing a leak-off test. 0 CRD, also Sprinter Van. My results are as follows: Injector #1 (the one closest to the front of vehicle). The fuel rail pressure needs to be above 3000 psi for starting to occur. Either way, I purchased new bolts and copper seals and I plan on doing the injector leak off test tomorrow to determine if there's a bad injector. May 7, 2018 · Hello, I did the injector leak off test and one of my injectors almost filled the tube needed for the test. 5-2" maybe) Jul 13, 2018 · Re: 02-04 fuel rail pressure & leak off test quantity clarification. Now hose around #2,#3 and #4 are wet. Conversely, defective fuel injectors can also cause engine stuttering, followed by acceleration and struggle to gain speed. I started the sprinter and ran it for as long as i could (before stalling) to get it warm to get better results on the leak-off test. It is possible for the injector to have a fault and have less in the bottle, but normally a faulty injector will leak off more fuel due to a worn internal injector components. Fault testing diesel fuel injectors to find Apr 21, 2013 · Thanks for the reply. If you find one grossly kicking out fuel then it would correlate to over-fueling which is resulting in a dying piston. (1. This is the OFFICIAL tool called out in the Bill shows how to test injectors in a 2002 T1N Sprinter. The ECU monitors the rail pressure from startup until shutdown of the engine. Oct 28, 2013 · I pulled over and cleared the code and sprinter has run great for about two weeks now. For some reason my signature didn't show up in the post, sorry about that. I am concerned about the one injector that gave a very different result in the leak off test and what I should do about the small leaks around the same injector. Be especially attentive to a slight delay when pressing your gas pedal. Once diesel has been warmed up it becomes thinner, revealing any leak Aug 8, 2011 · The injector leak off test is useful when diagnosing starting issues at cranking speeds. For info - last week I had the #1 injector replaced (following stalling and a subsequent leak off test). The only test that proves they are good is to remove them and have them tested on a Bosch stand. Will yours? This test procedure is the same for all Sprinters, up t Feb 14, 2007 · Any bottle with more fuel in it, indicates a fault with the injector connected to the bottle in question. May 3, 2022 · The leak seems fresh and maybe is primarily from the 800 miles I recently put on it. for now at least Thank you to Nelsonsprinter, Vic and Type2teach for the very accurate advice, which saved wasting time and money replacing the low pressure pump which the garage had diagnosed as the Dec 10, 2020 · Finding a scanner capable of running a smooth running test will inform somewhat on the relative health of your injectors’ lower nozzle valves, as the leak-off test assesses the health of the upper solenoid valves, but a Bosch bench test is the gold standard as it is the only test that actually measures the injected quantity. You didn't mention yet if it was for sure fuel or if it was exhaust. I cant see any obvious leakage but I have heard that there can be some leakage from the high pressure pump and the bolts get loose.

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