Filthy fuel injectors

Next time opt for the pressure washer.

Done in 15 minutes and no mess or potential broken wires in the cooler.

 

What do the tips on the others look like? Do they get near the actual nozzle, shape the spray? Just wondering what their purpose is.

Bit of a sandpounder if you'd need to replace an injector for want of that cap.

I've been thinking about this thread off and on, keep wondering if all the filthiness was just on the outside, the injector was flowing fine.

 

Found a pic:



And in this (short) video, I notice the plastic cap is missing, doesn't seem to bug him:

 

On ebay there is kit you can buy to clean your injectors. It is NOT the best, but how often will you use it?
Auto Car Vehicles Tool Universal Fuel Injector Flush Cleaner Adapter DIY Kit Set 4683812326351 | eBay

You could "rig" something with a small tank you could pressurize and fill with carb cleaner and back flush the injector.

You should get another EGR cooler, then soak the original one in GUNK, or carb cleaner and seal it so it won't evaporate. And maybe check every day or so. Also try the pressure washer. If it has turned to the hard carbon, you may need to glass beed it. But I think the soaking in GUNK or OVEN CLEANER for longer times should work, eventually. I would NOT use gasoline! TOO flamable!

 

The caps are there for a reason, I "think" they are there so align them, not for the spray pattern.

If you clean out the wells where the injectors seat, and use some vasoline on the seals, they will go in without a problem.

 

You could go to Toyota and see if anyone there can give you an answer. Or call the guy who cleaned them.
WHY didn't he mention that one was missing? Why didn't he have one to put on it?
You could use silicone spray, or oil. Just a light coating. I've used both and never had a problem.
Maybe even WD-40. Just something to help guide them in. Rubber against metal won't allow it to slide.
Thus FORCING it into place and possible cause the seal to get damaged.

 

Maybe the manufacturer?
It's been decades and I just can't remember. Sorry.
I could be wrong, but I don't believe they effect the spray pattern. Maybe someone else on here will give
you and answer later in the day/evening when they get off work.

 

Different design fuel injectors have a fine screen on the inlet that collect all the gunk the fuel filter misses and can clog the injector.
Your design it may not be visible.

FTZ Fuel Injection screens -no more stopped up injectors! & free shipping! | FTZ Racing

 

Toyota repair manual says to lube with gasoline or "spindle oil". The latter is really hard to come by: I looked it up and seems to often come in 5 gallon pails, lol. The guy in the video mentioned "gear oil". I've read vaseline a few times (besides just now, here) on BobIsTheOilGuy.

I happen to have hypoid gear oil, 80~90 weight, something to try.

 

The good news is that the injectors are fairly accessible without a lot of engine disassembly. You can always reinstall and see what happens.

 

I'm only done about a hundred or so injector replacements and cleanings but never had any come back.
Just figure out which is the easiest place to install it. And "IF" you have a problem in that area, you know
what it is!
I don't care what Toyota says on this, DO NOT USE GASOLINE!
WD-40, silicone, clean engine oil, sewing machine oil, grease, etc. SOME type of lube.
It it ONLY to allow the rubber seal to slide into place. Once it's seated, the lube does nothing.

 

Maybe you can talk with Rich again? He replaces those screens and caps routinely in his restorations. He might be taking a family break from doing the restorations, but maybe he'd still be able to steer you right, or mail you a cap.

 

A sand pounder reference in Ground pounders thread.

All over it on a Monday.

 

Sorry for bringing thread back. Do you think an oil catch can could be helpful?

 

Yeah it will help, some. Keep in mind an OCC is not an "off switch" for all the debris coming through the PCV hose. It helps, but they vary in effectiveness, and even the high end ones don't catch it all. But for sure will reduce it.

I keep thinking too: injectors may look grotty, but that's on the exterior. Maybe gently cleaning, brushing along the tip towards the front, never backwards, is pretty effective. If they are clogging I'd speculate it'd be more due to gasoline impurities.