Fuel Injecter cleaning did this myself after I found this

[LeoVampire]

http://fordfuelinjection.com/?p=82

This is a great step by step process a guy posted on cleaning Ford fuel injectors.

I did this when I hit 36,000 miles. Was shocked how dirty the injectors were. I got the kit at Ford for the orings and screens. But I don;t remember the price of the kit.

Doing it was still cheaper than buying a Injection cleaning kit or going and paying for the service which is about $100.00 or more @ most places.

Yes I know this is for older Mustang Injectors but the process is the same just differn't part's.

[Bradley G]

Can you give more details on how you got the test harness.
Did you make it?

[LeoVampire]

Can you give more details on how you got the test harness.
Did you make it?

Picked up a harness for a 4.6 mustang in a junk yard for $25.00 to test the injectors. Each time power is applied to an injector it opens and closes just once realy fast. So there will only be 1 click when power is applied if the injector is clean. If it isn't clean you may not hear the click very well because it dosn't seat properly with deposits in the way.

Just as an add on when all is said and done between picking up the harness and the cleaning fluid and the injector seal and screen parts and what not you will be close to what it costs to go to a shop and have them run a can of cleaner through the fuel rail with the fuel pump off. But I like the personal touch when it comes to my cars and doing an injector cleaning with the injectors out of the car is 100% better because there is no mistake on how clean they are and with replacing the screens alone is an awsome thing to do. This is how a lot of professionals do it the only step they add is a sonic cleaning machine while the injectors are in the cleaning solution.

[Bradley G]

Sorry did not see that last paragraph thanks,
did you find any solids in the little filter screens?
did it improve your mileage?

[LeoVampire]

Sorry did not see that last paragraph thanks,
did you find any solids in the little filter screens?
did it improve your mileage?

Also solved a slight ruff idle problem that happend from time to time.

And yes there was visable debri in the injector screens.

In the old days you never did a tune up without changing the fuel filter. Same goes for today but what people forget is the injectors over time still pick up contaminates in the screans that the fuel filter misses due to size of the foreighn matter. So the screens slowly build stuff up.

Carbs almost always pushed them into the engine but with injectors having direct exposure to what happens in the combustion chamber they tend to pick up a lot more contaminates over time and have a harder time expeling them.

When I was a working Tech in the shop we always sugested an injection cleaning every 20,000 miles but we did it with running the car on a can of cleaner on the fuel rail until the engine stalled with the fuel pump shut down. One of our customers was a traveling salesman had bought his car brand new and was comming to us for all services. After 100,000 miles we pulled the injectors when we couldn't solve a stumbling problem and ruff idle. The screens were filthy and very cloged up dispite the fuel injection services we did on the car. Inside of the injectors were very clean just the screens had the build up and were causing the fuel delivery problems.

All these solvents we add to the fuel tank brake down and remove the junk yes but it has to go somewhere eventualy. What does not get caught by the filter and screens goes into the engine and then hopfully out the exhaust. As the fuel filter gets older more of the contaminates by passes it and ends up at the injectors. I personaly change my fuel filter every Spring like clock work. And so far with only 36,000 miles have had only one fuel can injection cleaning on the rail. The cleaning solvent isn't that expensive but the kit's the shops purchase are around $500.00 to fit all of the cars out there this is why they charge $100.00 to $150.00 per service on customers cars even though it only takes about 15 to 20 minutes to do.

[Eric-Blk2004]

Man if I was more mechanically inclinded I would do this myself...

[omarauder]

Great info!! I was told the injectors were throw away items. Sounds like a good idea to do this every so often based on your mileage, as carbon builds up all over the intake manifold due to the egr valve letting exhaust gas in. The injectors are part of the intake and get it from both sides... the fuel side and the intake side... and small piece of carbon build-up can affect the spray pattern of the injector.
Is the o-ring/filter kit from Ford? If so what's the part no?

[LeoVampire]

Great info!! I was told the injectors were throw away items. Sounds like a good idea to do this every so often based on your mileage, as carbon builds up all over the intake manifold due to the egr valve letting exhaust gas in. The injectors are part of the intake and get it from both sides... the fuel side and the intake side... and small piece of carbon build-up can affect the spray pattern of the injector.
Is the o-ring/filter kit from Ford? If so what's the part no?

But I don't know the number. I just went to the parts department at my Mercury dealer and told them what I wanted and they ordered it didn't even have it in stock because they said they just replace them in the shop when there is a problem.

Tell them you want all of the rings seals and screens. Each come in a seperate package for 8 injectors.