Mechanic told customer it was a bad injector. Know what to look for. Before you spend your money.

Mechanic told my customer he had a bad injector because of the fault code SPN 1328 FMI 31.
It’s always important to ask questions and find out ps much as you can. Customer also mentioned he heard a sound when truck was at idle but went away when engine rpm was increased.
After a quick compression test we found cylinders 4, 5 and 6 had very low compression. Especially number 6, after a valve adjustment we were able to improve compression in all cylinders. Although number 6 did improve to almost 70% it did not increase like the other cylinders.
Remember to stay on top of your maintenance.

[@robertbrown1933]

1.5 million on original engine and its still going strong!! Good video guys and thanks for sharing your knowledge.

[@jiml9971]

This a case in point regular scheduling of maintenance is cost effective in the long run. You always say what’s true and best for your customers great diagnostic work again thank you sir

[@boygrasagarage6243]

Where so lucky we found your channel sir.. More videos to come and good bless you channel..

[@CarlosDieselElectric]

Thank you

[@juanthedad]

Want to take care of your unit. Do valve adjustment every 200k. Doing so Eng head will last you over 1 mill. Also per freightliner. It needs to be at or above 85%.

[@robertbrown1933]

Regular oil changes at 20000 miles or less and overhead adjustments is key. I do my adjustments once or twice a year because of the trucks mileage. Good luck everyone and be safe out there.

[@diydieseltech9232]

Thank you learn a lot from you great video ❤

[@goldygill7297]

Great video. Sir

[@geogeo8085]

Good job Pedro.

[@jasoncassidy2517]

I could tell it had a compression problem just by listening to it crank over

[@CarlosDieselElectric]

Correct. You can definitely

[@nikolausenovic1583]

Still don't get fooled guys, that engine can blow the valves in next 100 miles since they were so tight for so long. That's another danger of late adjustment

[@CarlosDieselElectric]

Very true. This is why maintenance is key. 👍🏼

[@real-nt9qy]

Better make sure its a good shop.

[@robertovillalon2841]

Thanks!

[@reynieto987]

Genial diagnostic

[@arifmesfin2610]

Great info 👍

[@shamosman7295]

Keep em coming

[@Steve.191]

Thank you 👍

[@tejnoor48]

Did you figure out the rpm bounce

[@CarlosDieselElectric]

@@tejnoor48 I don’t remember exactly. But if you are getting the RPM bounce could be caused by the quantity control valve. That leads to other things.

[@hop4ap]

What's the average cost of a valve adj

[@CarlosDieselElectric]

Depends on the Cascadia. For example, if it is the short nose it might be a little extra. But typically a valve adjustment will cost $350-450.

[@hop4ap]

@@CarlosDieselElectric thx

[@gabrielantinao6546]

where is your workshop ?

[@CarlosDieselElectric]

We are at 658 S Maple Ave Montebello, Ca If you need to call us, feel free to reach us at 323-728-4721

[@bankergeorge]

​@@CarlosDieselElectric finally

[@spacemerchant7]

I wonder what owner of this truck did next? I have same problem with sixth cylinder compression. Too low compared to other cylinders

[@CarlosDieselElectric]

Next step is a valve adjustment. Have a good mechanic run the overhead. But if the number 6 cylinder has low compression, have the mechanic let you know what they find. How tight were the valves on the number 6.? The intake will most likely be out of adjustment the most.

[@spacemerchant7]

My mechanic did valve adjustment and after that compression went to 96% on sixth cylinder. But it get worse after few months. Right now is around 83%. He says only replacing cylinder head will fix problem

[@CarlosDieselElectric]

@spicemerchant636 he is correct, the valves are worn and it will continue as the truck is used. Common issue with the DD15 2015 and newer. I think once Detroit switched to the single lobe on the intake CAM.

[@spacemerchant7]

I appreciate your input.

[@alex7289]

Would something like this still happen if you adjust your valves every 100,000 miles?

[@CarlosDieselElectric]

I don’t believe so, unless there is something else wrong. Just think of it as routine maintenance.

[@davinderpalsinghthind291]

I have alot of smoke coming out of exaust pipe . Also fuel could it be bad injector?

[@CarlosDieselElectric]

Could be, you have to test and find out. Does it sound like a misfire?

[@galadabdilahi8179]

How much it cost valve adjustment itself for dd15

[@CarlosDieselElectric]

A valve adjustment will cost around $400. If you have a DD13 with a short nose it might be more because you have half the motor inside cab.

[@alvarez062309]

I have a little issue with the abs I kw keep getting code spn810 fmi14. I cleaned all the rings and abs sensor. Is there anything else that I can do? Or what exactly do this code means? (I’m not a mechanic I’m just an o/o trying to fix my truck) thanks for the info.

[@ramonlizarraga5768]

How much its valve adjustment Pedro, dd15

[@CarlosDieselElectric]

Typically you are looking at $350-450 depending on the Cascadia you have. The short nose Cascadia will cost more because of the way the engine sits inside the cab.

[@marcmercado2085]

What’s the model number of your code reader?

[@zburkst2928]

He's using a program called Detroit Diesel Diagnostic Link 8 (DDDL)

[@inspireu9746]

Where is your shop located at?

[@CarlosDieselElectric]

We are in Montebello, Ca 90640