Injector cleaning

jason_247, May 10, 8:42pm
Any ideas of the best place to get a set of 4 toyota top feed injectors tested and ultrasonically cleaned?

ive seen prices vary fro $30 an injector to $60 each. but im not sure if the service would be equivalent.
intrade, May 11, 8:44am
ok injector cleaning , its quite difficult to explain to you as you wont likely have done advanced engine managmant training i would guess.
Basically its a waste of time and money to do this , if you know the injector is faulty for sure.
Why is it faulty, is the next question and for that to understand you would need to have a bit of the knowhow i mentioned .
basically cleaning injectors only works if there was a substance conterminating and making it stick.
injector cleaner and cleaning will not repair worn sticking nozzles or electronic actuator who cause the injector to malfunction.
intrade, May 11, 8:49am
So lets move to injector cleaning and what it really does , as mentioned above it cleans up contermination only.
Older petrol engin spray petrol on to or in front of the intake valve , and not in to the combustion chamber as it does on GDi fsi sidi petrol engine and all diesel engines.
Right i hope you understand this
the best injector cleaner is made by würth it goes in to the fuel tank.
it cleans your intake valves and deconterminates the gumm resedue inside injectors. No need for ultrasonic cleaning for this job
as i already explained cleaning dont fixes worn or faulty parts.
This is about as clear as i can try and make it without you knoweing adcanced engine managmant training and how it all really works
intrade, May 11, 8:57am
So würth fuel injector cleaner in tank . drive it to low dont drive it empty but dont refill tank till it is low , then see if problem is not fixed then cleaning them injectors not likely have any more benefit.
Correct testing of fault on injectors if remooved is done on injector test machine similar to diesel injector test, on cars its done with a injector ballance test , this only shows how different the fuel injectors are between each other .
So you need to be sure the injector is faulty and then you simply need to buy all good quality new ones . i dont think petrol injectors can be refurbished repaired like diesel injectors. the rest is covered in the above posts logical reason as to why not ,
elect70, May 11, 8:57am
Well my rangie just had them done as been sitting for 5 years wouldnt go tested all the electrics OK after obtaining a full test charts . ,now perfect & cost $30 each inc seals & filters . . Petrol forms a varnish when dry See car SOS other night same thing with R35 GTR sitting for 9years replaced injectors & fired up .
intrade, May 11, 9:08am
elect 70 if it ran ok 5 years ago then logic tells you its probably sticking from gumming up and not mechanical wear. its logic thinking , and injector cleaner in tank wont unstick a sticking injector that wont open cause its gummed shut so there you would need them phisicaly ultrasonic cleaning. hope it makes sense why i think it definetly did work in your case
jason_247, May 11, 9:13am
how was it sitting 9 years when the gtr has been in production just over 7 years?
jason_247, May 11, 9:19am
intrade.
Nothing is really wrong with the injectors,the car is running a little rich.
The car has done 247kms and ive been slowly replacing lots of parts just to keep it running as well as possible and making peak power without modification. doing the whole ignition system made a huge difference.

Ive heard varying opinions on injector cleaners that go in tank but the biggest reason i wanted them cleaned out of the engine is so they can be visably checked for flow pattern and comparing flow rates.
intrade, May 11, 9:20am
he probably got the years wrong you should not start argueing over pedentic stuff .
are you still Occupation: student /mad mechanic?
intrade, May 11, 10:09am
jason247 how exactly did you figure the car is running a little rich exactly?
also what toyota engine are we talking about here ?
intrade, May 11, 10:38am
For a injector flow test you would ring up on monday aecs and ask whom has there petrol injector test machine as that would mean you get professional facts from whom tests your injectors and not opinions from morons with no clue of what they even talk about

This was my single biggest problem when i started learning all this electronics crap as i like to call it. Not knowing who talks out ther backside and who actuarly knows and tells real facts correctly.
Aecs have training courses and if you dont know what fueltrims are i would advise spend the 600$ out of your own pocket and do the scantool course as first course like i did. From that you will be able to know instantly who talks out there backside with his opinions and whom is actuarly knowing facts.
like this is what A tutor said
have you ever looked at your scantool and looked at its data and sayd yea looks about right to your customers? he went on to say there is no such thing as about right, what this means you got no clue of what you are doing and we are going to change this now.

This is how you as customers whom bring a car for repair diagnostics can spot a moron. There is no yea it looks about right ever.
http://www.aecs.net/products/various.php
jason_247, May 11, 6:19pm
its a 1994 3sge which means theres no obd2 port to get full diagnostics
And its not a massively smart ecu either
Wideband probe shows a rich mix below 2000 rpm and better after that. and quite rich at idle even when properly hot so i was suspicious that the injectors have a poor spray pattern causing poor vaporization and incomplete burn or one injector is running lean and the ecu is increasing the duty cycle on all four to accommodate.

Will see if aecs has a recommendation for an agent in my area.

As much as id find it interesting i think paying $600 to learn about technology my car doesnt have is going abit to far for this particular project
intrade, May 12, 6:05am
your car has the exact same technology as a 2015 brand new car solong as its engine is not direct inejected petrol.
the electronics basics is exactly the same the only difference is the new cars have controlls plastered and linked from any other ecu of the car togather but the testing of the engine managment is exactly the same.
just because a newer car has a obd2 port dont means its any different.
On older fuel-injected cars there is way less stuff to be guessing abouts till you replaced all components on old cars . The newer cars make symptoms that are not even remotly related to the fault, that is why you would want to learn how it all works .
bigfatmat1, May 12, 10:47am
You can still get live data through the 17 pin dlc under the bonnet. So maybe someone knowledgeable might be able to help that has a scan tool. So you can see what's going on.
elect70, May 12, 11:04am
Yes could hear them clicking but no flow got them done done by Injector Services In auck
elect70, May 12, 11:07am
Ask the SOS boys thats what they said it was bought crashed&sat for 9 years in garage
melonhead1, May 12, 1:39pm
Are fuel injectors a situation whereby being a "swapatron" can be advantageous?