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What Injectors Will Work On My 5.3?

uh6077

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uh6077 Enthusiast

uh6077

Posted
Posted

I dropped a cylinder in my 99 NBS 5.3. All signs point to a bad injector. They are about $100 each new from the parts store. I looked on ebay and there are a few "new" takeoffs sets for cheap. Here is a link to one of them http://tinyurl.com/22xblm. It says it is for a 01-05. Are the injectors the same on my NBS 99? I need to get this done quick because I am taking the truck to Ohio then NY on the 26th

redvett Senior Enthusiast

redvett

Posted
Posted

No they are not. There are different injectors for different displacements,emissions & E85 vehicles. Why not just buy one OEM injector and you will be fine. There are different flows & pressures involved. 04 up are returnless systems.

uh6077 Enthusiast

uh6077

Posted
  • Author
Posted

I was just checking. A complete set on ebay is less, almost half, of one new OEM injector. Can you upgrade to different injectors?

98 Z71 SLT Senior Enthusiast

98 Z71 SLT

Posted
Posted

Don't mix and match years/injectors. You will only have problems.

 

Just go buy one injector, take 10 minutes to install it, and be done with it.

redvett Senior Enthusiast

redvett

Posted
Posted

Not with out a tune. The PCM is calibrated to get best fuel economy/performance & emissions.

BTW what year is the Triumph i had a 73 very early model with 750 cc not the later 733cc ran like a scalded dog.

uh6077 Enthusiast

uh6077

Posted
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Posted

I have a W4M tune but I guess it would need a new tune if I went with different injectors. I was hoping to find a whole set because everything I have read said that if one went bad, the others can't be far behind. I guess I will just get the one and at least get it running right again. Then I can keep looking for a full set and change them all later. The Triumph is a 73 Bonneville 750, right side shift. I buy and sell bike and I found this one two years ago in a guys garage. It had sat for 25 years because of some issues in the owners life. He emptied the gas and ran oil thru the carbs before it was parked. He also kept MM oil in the cylinders. When I got it home I put a battery and gas in it and it fired on the 2nd kick. All I have done to it was paint the tank and add and electronic ignition. I got it for $1500 and I have about $1800 in it total right now. Not the fastest thing in the world but it is fun to cruise on. I have a few KZ1000's if I want to go fast :eek:504796781_l.jpg

grimmysnr Enthusiast

grimmysnr

Posted
Posted

Yeah i would get the specifications of your OEM (which is what was tuned for you) and replace it with that. Injectors are rated in lbs per hour and if you change that by getting a cheapo injector or anything other than stock, that cylinder will do more than just drop. Trust and believe injectors are no joke and i would not put anything other than expensive stock ones in there. You can go bigger but id get Lucas brand or something of similar quality. Plus if you change injector flow you will have to get a new tune and that can be a real nightmare.

 

On my Grand Prix i had to change from stock to Lucas 42.5lb injectors for that turbo setup. Tuning that made me want to kick a puppy.

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