Cleaning Diesel injectors.... - Alfa Romeo Forum
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(Post Link) post #1 of 9 Old 27-10-10 Thread Starter
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Cleaning Diesel injectors....

Hi all, still trying to improve the economy on my 159 1.9JTDm which according to the onboard computer is currently showing 35mpg.
I was wondering if anyone has removed the injectors and soaked the tips in a chemical cleaner?
I know it's best to ship them off, but I was hoping for a cheap alternative, i.e. soaking tips in redex for a night or two and then refitting.

I have already removed all the injectors, brush cleaned(covered in ****) and refitted....the result= 36.5mpg.
I raised a thread regarding injector leak back check but got no replies, so hoping that someone has done something similar.

Has anyone seen an increase in mpg after a fuel filter change?

Cheers
Dave C
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i think if youv'e already removed them once,easiest option is remove them again and take them to an injection specialist for testing,im sure theyr'e about £15-£18 each to test.then you'll be 100% sure.just dont get the positions mixed up.
did you ever do a return flow test?
p.s. how hard were they to remove?did you have to depressurise fuel rail?
want to get mine tested/serviced soon.what number are they 0445110243?
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(Post Link) post #3 of 9 Old 28-10-10 Thread Starter
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Left the engine switched off for about 5-10mins and then disconnected the fuel pipes. Didn't seem to have any pressure px. To remove them all I did was give them a little wiggle and pulled up at the same time and they came out. You have to take all out if you want to get the one on the right out because they don't have the clearance to get past the pipe and union off the next injector.
I did my homework before removing them and found out that each injector is coded to the ECU, so yes like you said don't mix them up.
The only problem I had was I didn't have new coper gasketto use when refitting the injectors and as a result the had a little leak when it started....sounded like asteam engine.
My next thought is to do the return flow test, but I don't know what is an acceptable flow rate?
I need to write down the codes off my injectors before I send them off.
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if you get them cleaned/serviced how would you know which injector came from what position? how do you get them re-calibrated?
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Injector cleaning

Give this guy ago he has a good turn around time....

Mr Injector UK


I used him for the TS injectors, cost about £60 for the 4,they came back with a graph to show improvement to which injector

Last edited by 00Alfa Andy; 09-02-13 at 19:20.
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Quote:
Originally Posted by AValfaTi View Post
if you get them cleaned/serviced how would you know which injector came from what position? how do you get them re-calibrated?
the injectors have a serial number... write it down
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Use a marker pen and write the cylinder number on it...?
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Quote:
Originally Posted by 00Alfa Andy View Post
Give this guy ago he has a good turn around time....

Mr Injector UK


I used him for the TS injectors, cost about £60 for the 4,they came back with a graph to show improvement to which injector
Did you get a measureable improvement..? Or just a subjective/feel-good one?


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At first the car struggled to cope with the extra fuel and ran very rough! after about 10 miles the ecu adjusted itself and then ran smoother then before.
All in all I was happy with the result
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