Thanks again for the information. I will have a diagnostic test done before I go any further.

Thanks for showing the additional testing method with compressed air. All 6 injectors Ohmed out good so I will pull the injectors tomorrow and test them.

I bought a set of those junk China injectors for my 03 and they lasted about 2 weeks. Another set from some scammer in Texas didn't last 200 miles. I finally sent my Bosch to a guy in TN. He rebuilt and balanced them. My truck has ran great ever since. Smoother idle and best fuel mileage. My old truck has 580××× miles and pulls great.

I have spent a lot of time in China sourcing parts and other things for the diesel business. The most eye opening factory visit was in a town called Ningbo. They literally were producing the 505 and 503 injectors. Bodies, c.v.s parts and nozzles all made in one factory. They ran them on Bosch stands. Flash forward to me back in the states and I buy “Bosch injectors” for the job and they are the exact same ones from that factory. I don’t trust shiny. I would rather have a dull rebuild that looks like crap than a shiny Chinese knock off.

What could cause a lope at idle? Trucks an early 04 cummins. Starts easily hot or cold, doesn't smoke. I plan on replacing the fca soon, just worried it might be something else. Doesn't lope in gear, will only lope in park or reverse ( does lope when crusing to a stop, but only does it before slowing to 15mph, after 15mph it won't do it)

honestly,,the real junk is the actual common rail injection,the old 12 valves never had any issues like this,my 07 common rail will never be as reliable as my older 12 valves,which is why the CR engine is being yanked out and a built 12 valve is going in,the best of both worlds,great truck,and reliable mechanical engine,

I wonder what a rockwell hardness tester on both of them would show

Just bought what were supposed to be authentic Bosch 5.9 ISB injectors from the little buttholes. Lucked out and got my money back. They even said no need to return them!

China injectors are a nightmare.... I try them ones but never again. You have some nice parts and good prices on your website 👍 would you ship to France ?

I've used cheap Chinese parts before, but I won't touch injectors unless they're from a manufacturer that I have some degree of faith in. I watched a YT video a few weeks ago in which the tech was to diagnose a "runs like crap" condition after someone installed new parts, which included injectors. The tech noticed the new injectors and checked them, and found one that failed to close. With the injector pouring gas into the cylinder, he informed the customer that the engine may of hydro-locked that cylinder and bent a connecting rod. And that wasn't a common rail injector with pressures upwards of 20k psi. It was a gasoline port injector with pressures of less than 80 psi. As I watched this video, I just looked for other "el-cheapo" injectors, and there was one in which a guy put cheap injectors into an older LT1 engine, and a fog of unburnt gas bellowed from the exhaust pipe. Another injector that was just stuck open. Imagine that on a Common Rail, be it a Cummins, Powerstroke or Duramax. Instead of a cylinder, it would be a crucible for melting aluminum, the kind that used to be pistons.

Do test the mechanical cummins fuel injectors on a isl400

Yup tried these in my engine actually. They knock very loud and my engine miss fired like crazy. I'm sending them back for a refund.

Awesome info showing exactly why genuine Bosch parts make a difference. Makes me wonder if my new injectors are real Bosch. I have a cold start misfire and a steady chug or misfire sound around 1500rpm when cruising. Not sure what to do next. They ohm out ok, rail pressures look ok, prv is capped off, lift pressure is steady, delivery tubes are torqued... Could it be a lazy solenoid? I have a sound clip on my channel, trying to get outside opinions to make an educated move next.

He much r ur rebuilt injectors

Show a video of a 4bt injector teardown they have them on ebay for a set of 4 for 40 dollars

please I need Cummins injector to buy

Not all Bosch made parts are good, consider the CP4. compared with the Cp3. The Cp4 is like junk, in the US, guaranteed to fail and leave you with a $10,000 bill for a new fuel system. I have seen them come apart, the aluminum housing is junk, the buckets wear into them, the roller slide engineering is junk, slips, jams, twists in the bore. It is like how poorly can Bosch make something to fail and cost the customer a lot of cash after the warantee runs out. I know supposedly they work great in Europe, but dont you think Europe will move to ULSD too? Then what do you think going to happen. The CP3 is very robust and elegant and great engineering. I am sure Bosch designed the cp4 to make them more money, cheaper to manfacture, lousy for consumer just means more future sales of pumps and injectors when they blow up. They can even jam up and break the front gear case apart, then your motor is trashed, start over. Too bad cant have a 2 micon filter after these pumps in the high pressure rail.

Great video Shane, Call me sometime when you can to catch up. Jevon

Where are the Bosch ones made?

Spot with the China statement

So where exactly Bosch injectors are made from. Let me know because there are Bosch injectors on eBay just making sure you didn't get no other brand that you're looking at right here in your video Feller

Thanks you for explaining everything ,buy American build n real build by American 🇺🇸

These are Chinese injectors NOT injectors rebuilt by rebuilders in the USA. Also, the injectors you are comparing and your customer purchased are for heavy machinery so they would be different. Let's compare apples to apples. Other than that I enjoy your videos.

where is dodge getting the injectors from that they put in the new trucks?

Okay buddy answer the other two questions below I like to buy injectors from you for 2007 Dodge Ram 5.9 Cummins just want the stock ones what do they cost send me a number or post it so we can get a hold of you

Very informative video but why do you keep saying the injector from China or the Chinese injector when all Bosch injectors are made in China?

I had to check the date of this video, 5 years after filming this, the "store" is being given away.

even with him in its business as usual that's wher a lot of manufacturers are this is a global issue

Yes, the chinese stuff is terrible. I could go on all day. The other problem is that many Bosch parts are not that great either. Their solenoids for the 03-07 are failing much faster than they should

04

Great video sucks trump disnt got reelected

I would not buy from Ebay. I would send to the specialist to have it rebuilt. Did just that a few years back!!!!!!!