O.K. let the battle begin, with having limited history of my 93 and it running a little fuel starved in upper RPMs I figured it would be good to give the injectors a little cleaning after the new fuel filter.

So what is the preferred product of the Forum, I have pretty much always heard that TechChron is best but have also heard rumors that it can collapse fuel cell bladders. so input from those who have had successes

 

Concentrated Techron, and keep filling up with Chevron.

FYI, techron will not increase horsepower.

 

Read this

http://www.toptiergas.com/retailers.html

 

GM upper engine and fuel injector cleaner. Needs to be used in a canister type fuel injector cleaner. Good stuff!

 

 

OK so it would seem from those who responded, if you want to get the best professional cleaning the G.M. top clean is it. but requires special tools and procedure's .

But the TechRon is best for maintenance cleaning and injector health, so for the average person TechRon wins until your injectors are truly clogged or dribbling.

 

I would save my money. If they are clogged or restricted they need to be cleaned. I've never seen any pour in the tank cleaners fix anything.

I think GM even has a bulletin out saying they do not support any type of "maintenance" cleaning.

 

Here it is, Bulletin No.: 04-06-04-051

 

Gumout Regane High Mileage Fuel System Cleaner :

http://gumout.com/fuel-additives/reg...ine-treatment/

 

For a '93, the BEST cleaner is a trash can....

its time to replace them, cleaning those antique fuel injectors is like trying to put the rubber BACK on the tires...Once worn out,
its done. Over. Time to replace.

Too many folks fail to understand that there are other parts to these EFI engines that are also wear parts. Fuel injectors are one such part. They have a horribly demanding job to do, cycling millions of times per hour, with a strong solvent and dealing with heat all the time. They wear out ! The solenoids get weak, and weak solenoids get slow. They get slow to react to the signals to cycle, performance slowly goes down....ever so slowly, but it does go down.

Nobody gives you a funny look if you ask for injectors for a 20 yr old engine...its just as normal as buying brake pads with rotors.

When someone here ask where to go or who to see about this, even fuel injection tuning and upgrades, the standard answer is "Call Jon".
You may end up speaking to jr, but you'll will definitely get a Jon. The old one or the new one. There's a Jon for everybody.

Anyway,
Its not a matter of miles either. Time & alcohol blended fuels are what does the damage. Even in the 90's when things were finally being made to withstand the solvent effect of alcohols, there are still some things that simply cannot hold up against this excellent solvent. The solvent eventually wins. Plastics, fiber glass, most rubber compounds and many products that are made with resins, byproducts of crude oil. Then there is the battle between meth and eth...which one is in your gas tank? one is very cheap and easy to mfg while the other is less damaging to things found in an engine, but a little more expensive.

Bottom line, the cost of a set of injectors is cheap when its offset in the years of service and then you have to look at lost fuel economy with the old injectors...just how much mpg do you lose with the old ones? whats that add up to over 10 years? More than the cost of installing new ones I'd bet.

There have been hundreds of guys here that for one reason or another, installed modern fuel injectors, most often the Bosch-III that FIC sells by the truck load. I have never heard of anyone say their engine ran better with the old ones ! They ALL come back and talk about the very noticeable increase in both performance AND fuel economy ! Many other engine problems seem to vanish too,. Idle gets smoother, no more hesitation, starting is easier...everything gets better !
I've done it. Most guys with a DD that are 20+ yrs old have done it, and I am sooo glad that I did. I've got an L98 so it was a PITA for me. You LT guys have it easy ! Don't even get your hands dirty doing LT injectors!
If you go to YouTube and look for FIC videos, there is one that says it all...I think it was an FIC video or somebodies DIY guide to injectors...
There are big bins in the video that they use to collect and store the trade-in fuel injectors. They say that most injectors of a certain type, can be restored so they fix 'em and sell them as "reman" injectors...
These bins are labeled so they can sort the different types/brands and keep them organized...
The bin that has the old C4 injectors (mule-tic) Multecs, is the bin that is FULL and its also labeled "TRASH".

You should at least look at some of the videos about fuel injectors. Do a YouTube search for "fuel injector swap" or search FIC or simply "fuel injector"...you'll get there.

But, if you just insist that your fuel injectors are still good, just dirty and in need of a cleaning and they will be fine, and you are looking for an economical way to do this and tell yourself that ya did good,
Then find some LUCAS injector cleaner, either the qt bottle that you dose each fill up with, OR there is a single dose treatment that's around $20 that does make a difference. I'm a big fan of Lucas products..

The other cheap (inexpensive) way that has other benefits, is adding some Marvel Mystery Oil to a few gallons of premium fuel. That also works well and has the other benefit of a top end lube, cleaning guides and also seems to free sticky rings and quiets lifters and stops mild knocking from carbon accumulation.
But, IIWM, I'd spend the money and have a DIY Saturday afternoon project that's guaranteed to result in a noticeable improvement across the board in all areas. DIY injector swap is well worth the $300 it'll cost ya.



Good luck and have fun!

 

You can't buy that stuff in California. Sea Foam is the closest you can get.

 

Everything leesvette said is spot on and is Highly Advisable to follow what he's saying but anything put into the tank when you have old high mileage injectors or any with a problem is a waste on time and money, IMO.
If your in a pinch and just don't have any extra dough and have an afternoon free. You can remove them and clean-em half-way decent with some carb/brake clean. I've done this quite a few times for mine and for others to buy ya some time to save for new ones.
I've been doing it kinda this way
This guy has a pretty good set up but costs more and requires much more planning and gathering.

 

it is agreed that older high mileage injectors need service/replacement and that is what is in the plans. but rite now the car is running fair to good and not worthy of a take apart clean but more of a quick clean until the cash is their for a set of quality injectors not some bottom grade part store replacement.

in the future the question will be raised what is a good injector for the average guy on the street that wont drain their wallet

 

I now KNOW that nobody reads past the first 2 sentences....so whats the point into going to as much detail as I do trying to help and explain the why and how in a single post?

I guess there is none if they won't even look at the info that's sitting right there. And being able to anticipate the next question, I always throw that in there too. It takes more than 7 words to give an intelligent explanation and a 'why' it is the way it is.

I guess for the same reason people refuse to buy their own Factory Manual....easier to get somebody else to answer their question than it is to read and learn something......

Mr Carter, you just helped extend the life of this keyboard....its gonna get a whole lot less use from here on out. TY

 

First off Lee I am not looking for aggravation and do respect your input, but to quote you ( 93 injectors trash can ) so why would I go to such extent as to take out clean up, to again quote you ( worn out servos and other moving parts ) I going to cut threw the chase and start looking and for some not over the top expensive street able injectors. and in the future when the age of the injector is known,
what you posted will be used and I do recommend your input for those who do have a known history of their car.