Injector Cleaning

[heliox]

Im sure someone in the know could tell me if its possible to get injectors tested & cleaned.

if it is, any recomendations as to where to go to get it done?

H

[mrflibbles]

Yes its possible.

There are various additives on the market to do this - Redex and STP spring to mind (redex is better) - put that in the fuel tank. Costs about a fiver.

Alternativley there are places that will take your injectors out and ultrasonically clean them, which is obviously better, but more costly. I think about £15 - £20 an injector (?)

Best place depends on where in the country you are I spose.

HTH

[deltaf]

Look for a company that uses a Lucas Asnu injector cleaning machine.
They take the injectors out and clean em ultrasonically before flow and pattern testing them.
Can vouch for the effectiveness of these machines as have often used them.
Cant help you out in Suffolk as youre miles away from the place id use.
HTH.

[Matt_T16]

deltaf said:

Look for a company that uses a Lucas Asnu injector cleaning machine. They take the injectors out and clean em ultrasonically before flow and pattern testing them. Can vouch for the effectiveness of these machines as have often used them. Cant help you out in Suffolk as youre miles away from the place id use. HTH.

Seconded revived many an injector that way.

[deltaf]

Good machine, and process, arent they Matt?

[andys2]

Try this guy:-

www.lundengines.com

Ask for Steve, I've just had a set of 8 ultrasonically cleaned and flow-matched, the difference was very noticable and well worth the £70 he charges.

Andy

[fergus]

PS added to say flowmatching is very important if you're running an aftermarket EMS and want to optimise the system for a given duty cycle and pulse width, etc. It will ensure each cylinder is given the correct amount of fuel. Even running a wide band lambda sensor can't correct for this, as even if you're running two sensors, they typically take their reading from an aggregate of exhaust ports.

[heliox]

Cheers all for your advice, havent got round to it yet but its on the cards.

h

[lanciachris]

Or remove em yourself, attach directly to the battery and a tub containing just injector cleaner for the 'fuel' source. Even catch the flow in a tub for running through again if its not too bad

[deltaf]

lanciachris said:

Or remove em yourself, attach directly to the battery and a tub containing just injector cleaner for the 'fuel' source. Even catch the flow in a tub for running through again if its not too bad

Bad idea mate! Youll most likely burn out the injectors as the duty cycle will be 100% with the battery connected to em! Not good at all!
Better to take em in and have them pulsed at the correct frequencies in the ultrasonic bath using the correct injector cleaner fluids, really, it is the best way to go.
HTH

[steve_D]

I'll second the bad idea for another reason.

The jet from the injector is so fine and high pressure i'm told it can spray clean through a finger.

Steve

[deltaf]

steve_D said:

I'll second the bad idea for another reason. The jet from the injector is so fine and high pressure i'm told it can spray clean through a finger. Steve

Thats a correct assumption. Usually applies to diesel injectors tho and when doing a "pop" test.
Atomised fuel at injection pressure can easily penetrate the skin causing blood poisoning.
Best not to play.

[rustybin]

deltaf said:

steve_D said: I'll second the bad idea for another reason. The jet from the injector is so fine and high pressure i'm told it can spray clean through a finger. Steve Thats a correct assumption. Usually applies to diesel injectors tho and when doing a "pop" test. Atomised fuel at injection pressure can easily penetrate the skin causing blood poisoning. Best not to play.

It may be an apocryphal story but a guy at Eastleigh train maintenance depot managed to do this with an injector from a diesel loco. He had to have his, now extremely large, hand amputated.

>> Edited by rustybin on Friday 6th August 09:57

[heliox]

oohh nasty,best let an expert in these thing do it then.

Is there any special techniques involved in removing the injectors?

cheers

H

[steve_D]

heliox said:

oohh nasty,best let an expert in these thing do it then. Is there any special techniques involved in removing the injectors? cheers H

As an expert in getting into tight spaces it should not be a problem.
Not seen the injectors on your engine type but in general.
Release the pressure in the fuel rail. Find a union you can release and catch the fuel. Cover with rags as you undo as the fuel could spray everywhere.

The injectors will be held in place with a bolted down plate. This may retain just one injector or many.
Release the electrical connector.
There may be a pipe connecting the injector to the fuel rail or it may plug into the side of the rail with an 'O' ring seal. The rail may need to be released and pulled back.
The injectors should then pull out of the housing.

If anyone knows something more specific then jump in/shoot me down.
Steve

[Pies]

Removing the injectors also involves removing the plenhum chamber and trumpets on the RV8

[heliox]

Ok, thanks for the advice, i'll give it a go removing them next weekend.

Steve D, its not always as tight as you might think mate.

H

[timf]

mjs transmisions in ipswich have the injector cleaning gear

[steve_D]

heliox said:

.....Steve D, its not always as tight as you might think mate. H

Information overload.
Steve