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Description
Use the fuel rail block off cap to block off fuel injector lines at the injection rail to help isolate and diagnose a leaking or faulty fuel injector.Please review the video on how to properly diagnose a faulty common rail fuel system.
Reviews
Write a reviewGreat I think!!
Jan 21, 2017 | By Anthony Pollard
Product worked great, however I wish I knew exactly what to look for once I capped off each fuel rail. I think there needs to be instructions on what to listen/look/feel for when using this. I think I have the bad injector isolated, but am not sure. But it did its job without a doubt.
Test cap
Sep 6, 2017 | By Ken hill
Been looking for this product ever since i had to diagnose and repair injectors on my dodge
Awesome
Oct 26, 2017 | By Colby Weihe
Made a small order but very important placing the order was easy fast got in about two days will definitely be ordering again
Perfect
Dec 3, 2017 | By D
I had a fuel knock for a while. Injector kill test only goes so far. Got 2 of these plugs and they found my problematic injector. This tool saved my truck from going to a new owner lol
Works
Dec 12, 2017 | By Carl Harris
Haven't used them myself, but the mechanic I had the truck at, did--and he used them and didn't say anything about them being difficult to use or anything like that. All he said was that the first injector he tried was the bad one. So I guess they're straightforward to use. I was surprised that there are two pieces to these things. I guess that's to allow for a bit of alignment.
Test cap
Jan 12, 2020 | By Dave Myers
I purchased this recently and did not need to use it. The problem was my CP3 pump wore out after 15 years. Well made and the same as the mechanics use at the local shops. Thanks Geno's for the right parts for the job!
Test cap
Jan 12, 2020 | By Dave Myers
I purchased this recently and did not need to use it. The problem was my CP3 pump wore out after 15 years. Well made and the same as the mechanics use at the local shops. Thanks Geno's for the right parts for the job!
Saved me hundreds of dollars if not more
Jul 21, 2021 | By Peter
I've got an 03 and had a leaky injector. Decided to replace all six with new ones, but the truck wouldn't run with the new injectors. Had the injectors 'tested' and was told they were all fine. Still wouldn't start. My next step was to have it towed to a shop where I expected to spend upto 1,000 having it diagnosed. Watched Deboss Garage on YT and he showed how to cap off the injectors one by one...to see if the issue was a stuck injector. Second injector I capped off...and the truck fired up. Ordered a replacement injector and she's been running great since then. I like to work on/fix my own vehicles..so I know what's been done and how. I firmly believe this tool saved me hundreds, if not at least 1,000 in labor. and towing.
Owner Response:Thank you Peter. You suggested a Deboss Garage video, so we checked it out and found it to be helpful. It is titled "No start in 24V Cummins Common Rail. How to diagnose and repair." If anyone is interested here is a link: https://youtu.be/VYKyj4hphjo
Also, we found another video from Deboss Garage that we thought would helpful. The video is titled "How to replace Cummins Common Rail Fuel Injectors." https://youtu.be/ilVRMQHp3C0
Install and Tech Information
Videos
