* DIY Injector cleaning how to * Pic Heavy

s3dave

s3dave

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I thought i would start a new thread for this, so it does not get lost in the other one.....

This is a guide to ultrasonically clean your injectors, plus fuel pressure regulator... AKA, FPR thats what i will be calling it on this how to, for obvious reasons.
I have tried to do the how to, so a completely clueless person can understand, so dont think im being patronizing ....lol

Safety first,,,,you are messing with the fuel system, there is likely to be a little fuel lost in this process, so bear that in mind....

So to start off this is the fuel rail, where all the attention will be
img0097hm.jpg

By d121m at 2011-05-14
and the FPR...
img0098z.jpg

By d121m at 2011-05-14

Start off by unclipping the electrical wiring loom
img0100om.jpg

By d121m at 2011-05-14
There are 3 clips holding the loom to the rail and simply push off
Next is The FPR pull the hair clip type thing away from the FPR.... Then pull the vacuum pipe of the FPR
img0104ya.jpg

By d121m at 2011-05-14
Then get a cloth and put it over the FPR then twist and pull at the same time,(be prepared for some fuel spillage) it may be tight and require some patience but it will eventually give in, put it somewhere safe for now.
img0113mi.jpg

By d121m at 2011-05-14

next is to get the little clips off the top of the injectors that hold each connector on,
a bit fiddly, i got a small screwdriver and eased them up, make sure you dont drop anything as it will be lost forever.....put all 4 safe and pull the connectors off each injector,
img0106wb.jpg

By d121m at 2011-05-14

Next is to remove the rail from the manifold...(it is still connected by the fuel pipes no need to touch these)
there are 2 cap head bolts to undo (again make sure you dont drop them)
img0102jd.jpg

By d121m at 2011-05-14
and the other one...
img0103f.jpg

By d121m at 2011-05-14
After these are removed and kept safe its time to pull the rail up with the injectors,
once free of the manifold you can get to the injector clips (yes more clips) these simply slide out
img0109hl.jpg

By d121m at 2011-05-14
a pic of one out....
img0110sc.jpg

By d121m at 2011-05-14
take all 4 out and keep the safe, then pull the injectors out of the rail, sometimes the O ring keeps in the rail ... just hook it out and put it back on the injector
once all 4 are out you are ready for the fun part....Bath time...
injectors before their clean
img0112b.jpg

By d121m at 2011-05-14

Next prepare your ultrasonic cleaner....
img0115cw.jpg

By d121m at 2011-05-14

I used very hot water and a cap full of james sea solution and put the cleaner on max 480 secs
Get the injectors in along with the FPR and watch the crap come out of them...
img0116la.jpg

By d121m at 2011-05-14
img0117u.jpg

By d121m at 2011-05-14
when it is finished the water looks like this:
img0119ix.jpg

By d121m at 2011-05-14

Take them all out and shake then let dry for half an hour or so,....Clean injectors!!
img0120rey.jpg

By d121m at 2011-05-14

Refitting is a reverse of the how to, being careful not to lose anything make sure everthing goes back the way it came off, start the car and check for leaks.....
My car took a lot of starting (well third attempt) this time round must have got a bit of air in...
so dont worry if it does not fire up as usual when first started...

TOOLS NEEDED

allen keys
small screwdriver
small pliers
ultrasonic cleaner + fluid Ultra 7000 Ultrasonic Cleaner : Ultrasonic Cleaners : Maplin
*on offer at the moment*
little vid showing the cleaner doing its magic....

http://img837.imageshack.us/img837/9379/8jp.mp4
 
Last edited:
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Nice one!! im sure this will help a lot of people! did you notice much difference after the cleaning?
Did you change the o ring seals on the injectors?
 
I did notice the first time round..... not much today its only been a few months though, i did it for the write up today as a lot of people are asking for one...
my O rings were not changed and did not need changing to be fair...
 
Cheers Dave,mine going to be done Thursday.
 
Its the injector seats that leak more than anything, not the seals.

Im going to get my ultrasonic cleaner tomorrow seen as its on offer.
 
iPhone mishap Dave :/
Yes a sticky sounds good
 
I guess they arnt stock S3 injectors? mine dont have the tubes on the bottom :think:
 
Great write up Dave! Top bloke.

This thread was worth it for me simply to know the cleaner is on offer! Just bought one and saved £20!!! Class!
 
Dave, just a quick one. Would ultrasonic cleaning sort a leaking injector?
 
audi upgrades
Anyone in the north west happy to help me with an experiement? I want to try ultrasonically cleaning my injectors in one of these maplin machines, then get the spray patterns checked then cleaned on an ASNU machine to see how clean they actually get them :)
 
audi upgrades
I went for the one with 500ml of sea clean which was 30 quid Nattie
 
voorhees said:
I went for the one with 500ml of sea clean which was 30 quid Nattie
Click to expand...

Oh yes, forgot to get the cleaning solution.

Anyone know where I can get some sea cleaner or whatever should be used.
 
S3 Nattie said:
Oh yes, forgot to get the cleaning solution.

Anyone know where I can get some sea cleaner or whatever should be used.
Click to expand...

Ermmm Amazon :slapped:

I did mine today and they were filthy
 
I was thinking of somewhere I could walk to like a supermarket of something.

Your cleaner has come already. How does the car feel
 
I haven't driven it for a distance but mpg seems to have improved,loads of gunk come out
 
Hope my mpg increases. Ive run my car on vpower all the time which is meant to clean your injectors to so be interesting to see how much gunk comes out.

Just found some JPL sea cleaner at Maplins so going to get some. Sorry if this has already been said but do you fill the bath with warm water and add a ceratin amount of the sea cleaner to it.
 
S3 Nattie said:
Ive run my car on vpower
Click to expand...
I used to until they started having supply problems
S3 Nattie said:
Just found some JPL sea cleaner at Maplins so going to get some. Sorry if this has already been said but do you fill the bath with warm water and add a ceratin amount of the sea cleaner to it.
Click to expand...
A capful per 200mls I did two and also add a dash of washing up liquid in the first clean as they are bound to be filthy.
 
s3dave said:
Did everything go to plan Jase...?
Click to expand...

No Dave,I used ETKA to get seals and it shows BAM having two different ones,fitted them and the lower ones were loose (suspect straight away),but went ahead and had a whoosh and it was surging so put the old ones back on and sweet.
Very filthy water though...have I said that already :)
 
mine have just had their bath. VERY dirty, but rings look all good. had to clean them once with cap full, then a further 180s with frest water washing up liquid (still crap came out), and then cleaned the outside by hand (bit oily) and a further 180s. slight crack in the orangy plastic ring at the bottom of one injector though (present when i took it out, nothing to do with cleaning). Any one else come across this? its not snapped, just a bit of a crack
 
Has anyone had GREAT difficulty putting the fpr back in?? mine is refusing and im nearly to the point of putting my weight on it. Dont want to break the rail though so if anyone can suggest other means, that would be great.
 
What are these seals on the injectors i keep hearing about? Ive read somewhere about there been two seals to an injector, is this just reffering to the top o ring and bottom o ring that sits into the manifold?
 
Thought so, i think mine maybe on the way out. Anyone know the part numbers cos ill changed them the same time as cleaing them.
 
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