P38A Injectors?

oakey · May 13, 2020

95 4.6 auto 198k
Is there any mileage in considering replacing the injectors at high mileage?
Do they wear out appreciably?
Can they be cleaned?
Ta for opinions

Mark Piercy · May 13, 2020

Evening what sort of mileage are you talking?

oakey · May 13, 2020

hiya
198k

Mark Piercy · May 13, 2020

I suppose pulling one or two would show if they are dirty or worn but you'd need to inspect the tips very carefully. Are they nearly £50 a pop ?

discool · May 13, 2020

oakey said:
95 4.6 auto 198k
Is there any mileage in considering replacing the injectors at high mileage?
Do they wear out appreciably?
Can they be cleaned?
Ta for opinions

If it isn’t broke etc etc, injectors will tested as part of their service and then ultrasonically cleaned and spray patterns checked.
Any of the injectors knocking thus indicating wear, if not and the engine running and idle is fine leave alone just stick a bottle of Redex or similar injector cleaner in the fuel tank and leave it at that.

Mark Piercy · May 13, 2020

discool said:
If it isn’t broke leave alone, injectors can tested as part of their service and then ultrasonically cleaned and spray patterns checked.
Any of the injectors knocking thus indicating wear, if not and the engine running and idle is fine leave alone just stick a bottle of Redex or similar injector cleaner in the fuel tank and leave it at that.

Very good point..

oakey · May 13, 2020

I agree with that
Yes £50 a pop
I have never had them out
She misfires at high revs and not cracked it yet so just wondering if injectors die after too long

Henry_b · May 13, 2020

Injectors have a service life..

As said above the spray patterns can be checked..

oakey · May 13, 2020

Do I just take one out, stick 12V across it and see pattern?
Can they be cleaned with a wire brush?

Henry_b · May 13, 2020

oakey said:
Do I just take one out, stick 12V across it and see pattern?
Can they be cleaned with a wire brush?

NO WIRE BUSHES!!

They can be sonic cleaned and tested if there is shyte in there..

romanrob · May 13, 2020

I had mine cleaned last year (V8). I had a warm start issue, and a smelly exhaust. Having eliminated lots of other potential causes I bit the bullet and stripped out the injectors and sent them off. New o rings and filters, with a report on spray patterns. c£80 iirc - they will tell you if one is up the creek and needs replacing.

oakey · May 13, 2020

Thanks guys
I have a sonic bath but cant really check the pattern
Sending them away sounds good, any recommendations as to where to?

romanrob · May 13, 2020

injectortune.co.uk (Wiltshire) is what i used - there and back was about a week. On checking, it was actually £110, but much cheaper than replacing with new, or even 2H

oakey · May 13, 2020

thank you

discool · May 14, 2020

oakey said:
Thanks guys
I have a sonic bath but cant really check the pattern
Sending them away sounds good, any recommendations as to where to?

Lots of information if u Google ‘how to clean fuel injectors’ I’ve never had any injector issues, but it appears from my quick search the injector spray Is okay with just an even fan patten plus any cleaning can be done with carb cleaner.

Also instead of dismantling the fuel rail the injectors can be tested individually with a piece of electronic kit as shown. What ever next

oakey · May 14, 2020

That looks quite handy thank you

Marshall8hp · May 14, 2020

Instead of reconditioning the originals I bought these https://www.ebay.com.au/itm/8-GENUI...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649 Plug and play and a couple of questions I had the fellow was extremely helpful and came back with answers very quickly.

oakey · May 15, 2020

Very interesting
Pretty cheap too
Thank you

Grrrrrr · May 15, 2020

discool said:
Lots of information if u Google ‘how to clean fuel injectors’ I’ve never had any injector issues, but it appears from my quick search the injector spray Is okay with just an even fan patten plus any cleaning can be done with carb cleaner.

Also instead of dismantling the fuel rail the injectors can be tested individually with a piece of electronic kit as shown. What ever next

Can you not just pull it out and stick it in a cut off bottle or something and run the car briefly to check it is spraying evenly?

Misfire under high load: have you checked compression?

pwood999 · May 15, 2020

I cleaned mine on the bench.

12" Length of tube on injector inlet.
Fill with carb cleaner.
Far end of tube attached to compressor via regulator set to 20 PSI.
Point injector outlet into a jar.
Pulse the injector with 9V - 12V & see the dirt & crud come out.
After a while you get a nice even spray.
Fit new seals & re-fit to engine.

Professional cleaning services simply have a machine to mount the injectors & do the same thing !!

P38A Injectors?

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