Bad Injectors

I cant find anything about what additives anyone puts its all proprietary, but ive always heard that some gas station add water to their fuel, and I thought that it was an old wives tale, so I see now how its possible.

 

There's a lot of something in this thread... I can't quite put my finger on it

 

See, what you purporting as fact is really just your opinion. You believe Costco's micro managing of their quality control is the opposite. I'm reasonably certain they don't just eyeball it when mixing in the additives. Also, what's the difference between "dirt cheap stuff" and Top Tier at the refinery? Isn't it just the additives or are you implying that additives aside, there is a difference in the quality of the gas product that a refinery will produce.

 

The injectors themselves are easy to replace.. simply unbolt injector lines, remove valve cover... pry out old injectors (some require a special tool, but you can use a small pry tool, or a set of these... remove the cap cover from new injector and install..

NOTE: ONCE YOU REMOVE A DIRECT INJECTOR you must be certain to asess it quickly, and either re-install it, or be prepared to not ever install it again.. the phenolic seal ring near the tip will expand and you will NEVER get it back in the bore... do not force it... they should slide in with little force.. you should also clean out the injector bore to be sure NO soot/crust has formed to block the injector from fully installing.

BMW I know the injectors have to be coded (serial number on injectors, correlates to tested flow rates IOW: it'll run like shit, or ECU will not let engine start, throw codes, etc...).. not so sure about toyota D4S system....

 

If the same ones keep going out would it not be an issue in the engine other than gas used ?

 

Psst, the powertrain warranty is 60 months or 60,000 miles. So yes, two rusty injectors at 71,000 is a candidate for Goodwill.

If I were Toyota I'd want them back for analysis. If I paid $2k to have them replaced I'd frame them and put them on my wall. I certainly wouldn't let the dealer keep them.

 

The dealer will have to go to bat for him or he can open a case with Toyota Corporate. Either way, I'd would at least want to inspect the injectors first before committing to goodwill. If this is an isolated case, I would think his chances are slim.

 

Injectors are weird. So I'd say it would depend. 70k miles 2 injectors is weird. Most common problem would be gas before looking at engine failure. Haven't heard of complete engine failures on the third gens yet, except for that one guy climbing a 90 degree hill.

 

Aren’t our injectors supposed to be self cleaning?

 

I think the OP mentioned they were corroded not clogged.

 

Find a wrecked junkyard taco and get a whole set of injectors, find a local wrench to put 'em in if you don't know how

 

For anyone interested in the New England Area, I reached out to C--------- Farms Corporate office today to see if their gasoline is Rated a Top Tier, The answer I received was No. So if your looking to run only top tier gas to keep your injectors clean you may want to shop elsewhere. In case inquiring minds want to know !!

 

I pump costco gas almost exclusively. Never had an issue really, both 87 and 93. I currently have 13k

I did however run 2 techron (concentrated formula) bottles at the same time on about 3/4 tank. The engine definitely idles smoother after I ran that tank. I have the feeleing that D4S and all, direct injection will always create more soot and deposits than only port injection. I drive with a semi leaded foot and occasionnaly hit rev limiter. Also lots of stop and go traffic. I rarely hear the seldf cleaning cycle like when the truck was newer. It was very noticeable when new. Sounded like a bucket of bolts at idle.

 

You may want to check your federal/state emissions warranty as well. It's been a while since I had to look at one but I believe the injectors would likely be covered as fuel metering is directly related to exhaust emissions. Not sure, but worth a look.

 

You hate Costco,don't you.

 

Does anyone have audio of the "self-cleaning cycle" that some are talking about? Is there a manual reference?

 

Additives are done at the fuel terminal, here in the north east it's done at the boston site. The top tier companies Sunoco, Shell, ExxonMobil have their on dedicated terminals. Gulf, Cumberland, BP, use contractors to pick up and deliver their fuel (not a fleet co truck) besides the point. They get the fuel at the same place as the Top Tier companies just the fuel is different from different tanks. Cosco fuel I'd never get gas, there the lines are enough not to wait in to save a few bucks on a tank and risk low quality fuel.

 

What risk?

 

Getting low quality fuel, usually under the indicated octane rating and poor low quality conditioning adjents. OP could take a fuel sample from his tank and get an analysis.

 

Isn't that the same risk anywhere then?