Diesel Injector Question

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Jan 15, 2018 | 07:32 AM

The Big Snak

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Diesel Injector Question

I have an '86 6.9L IDI with a non-wastegated Banks Sidewinder. It has 99K miles on it so this summer I will replace the injectors and pump so it runs for the next 100K miles. My questions are:

Are stock injectors and pump sufficient? I do not know if these were upgraded when the turbo was installed. This is my camping/fishing/snow truck. I don't do any heavy towing.

Is there any advantage to replacing the stock fuel return lines with one of the fuel rail systems I see advertised? I have had to replace the return lines once due to leaking (although the lines I replaced were a mess of non-stock rubber and cheap auto zone plastic tees, so maybe that was the issue).

Thanks in advance for any advice. I have attached a pic of the truck since we all like pictures.

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Jan 15, 2018 | 07:37 AM

Franklin2

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From: Virginia

Stock pump and injectors are fine even with a turbo. Usually when a turbo is added, the pump is turned up a little bit to add more fuel.

I know everyone says the pump and injectors only last 100,000. But my 7.3 has 148,000 and it runs too good for me to mess with it. I am not changing mine unless something noticeable happens with the engine.

Jan 15, 2018 | 07:39 AM

FuzzFace2

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From: Angier, NC

I don't know about ford but the GM banks kit all you did was advance the pump to their spec to add more fuel and that was it.
I would give banks a call and see what they have to say to be safe.
Dave - - - -

Jan 15, 2018 | 07:22 PM

The Big Snak

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Quote:

Originally Posted by Franklin2

It doesn't run as good as it did at 50K miles, starts rougher and is not as smooth as it was once warmed up. Even though I think it would run OK for a while, I want to set up for the next 100K and not worry about it.

Jan 15, 2018 | 07:27 PM

The Big Snak

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Quote:

Originally Posted by FuzzFace2

That's a great idea except...I sent an online inquiry in to Banks, got a really nice email from a guy who said to call him to address technical questions...called 3 times a week for 3 weeks, never got the guy in person, left a message every time and never got a call back...that was in October. Instead, I'll find one of the installation manuals online and see if it lists setting changes.

Jan 15, 2018 | 07:30 PM

82_F100_300Six

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Pretty funny one time I was putting diesel in a formerly owned Ram 3500 and I heard a diesel crank up that sounded like a complete BEAST

I start looking around to find the source and i see an old bullnose back out and pull away from the store.

Jan 16, 2018 | 01:21 PM

cadunkle

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From: NJ

If your EGT stays under 1200* and it's not blowing huge plumes of black smoke all the time you can turn the pump up more. Go one or two flats on the allen wrench depending on your current EGT and test.

If injectors have 100k miles they're likely popping at widely varying pressure so each cylinder is firing at a different timing than the others, and you probably have some leakers with a poor spray pattern. You could disassemble, clean, and pop test your injectors then shim them all to at least 1800 psi and within +/- 50 psi and it'll probably run smoother. If you want new you should order from either R&D IDI Performance or Conestoga Diesel Injection.

Personally I run a 100cc pump from Conestoga along with the higher psi injectors and am pleased with the results using a Banks wastegated turbo. Yes the engine needs more turbo and an intercooler, but it performs reasonably well with the extra fuel.