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I get it. The precombustion chamber gives the swirl and high velocity of the intake charge. Low pressure fuel is injected and combustion happens. The flame front expands out of the precombustion chamber, across the cylinder, then down as it pushes the piston down. But when you compress .77...

I don’t see, personally, how a Diesel engine with 18-21:1 static compression would even need glow plug in 90 plus degree weather. Not saying I’m disagreeing with any one. Just stating my opinion. My gut has been saying fuel issue. I could be wrong, wouldn’t be the first time. Because I’m...

Action, you must be mistaken. I’ve never met you in person, haven’t lived in Florida for over 12 years, and never worked on your car. Sorry for the confusion

Bighorn; these injectors are new stock replacements. This knock/pinging only started after I replaced the injectors. And it also not occurs off throttle (rev down) after reving up (1/4 or more throttle you input). I didn’t even suspect cold advanced due to ambient temperatures being 90 plus...

What?

Update; The injectors are new. The owner just text me and said it knocked at first when reving, but once it came up to temperature, the knock went away. Injectors are not the problem. I’m thinking piston slap

Diesels can’t have to much air for combustion. They actually run on a surplus of air tobegin with. In a diesel, your throttle pedal regulates fuel rates, where at in a gas engine, you regulate air flow via the throttle plate. Diesels don’t have a throttle plate.

One had a cracked and leaking fuel pipe connection. Hard starting, black smoke, rough idle, and for $35/injector, the owner thought it was cheep insurance. Yes, I took iff the intake manifold to remove all the injector supply pipes for inspection, cleaning, and to make injector replacement easier

The problem is I’m just the mechanic, the owner is already frustrated with the cost involved in it as of now. Plus this thing needs to be up and running in a month. My only available time to work on it is half days on the weekends

Yes, this started after injector replacement. It didn’t do this before injector replacement. It was a process over 4 weekends. I used a shop vac with a plastic pipe attachment to vacuum out each intake runner and around the intake runners/valley before and after intake manifold removal, during...

After talking with him, he said the injectors are fresh rebuilds and they get them from a third party. In his experience it's been cured by replacing the injection pump and lift pump. If that doesn't fix it, then it's piston slap, rod knock, and/or wrist pin slap. But it's nothing to be...

They now want me to talk to their technician. We will see how this goes

https://real4wd.com/store/Injectors He got these injectors

R&Red some injectors on an M998. Got it running. Checked for any leaks at idle. Gave it some throttle. Took my foot off the throttle and it started pinging/knocking loudly. It will only do this off throttle. What in gods green earth is going on here? I vaccumed out each runner on each head...