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Hello all.
Just a quick pic and a review of how I've got on having my Bosch upgrade 7A injectors ultrasonically cleaned.
Injectors installed now for 7 years and 45,000 miles of service. Not mega miles but according to the website of the company who cleaned them; apparently long enough for there to be detrimental deposits.
With no particular concerns over performance that I was hoping to fix, I sent them off mainly out of curiosity.
Results i think were well worth it.
The service sends them back recorded Special delivery and you get a report included showing the flow rate before and after test.
Mine had a mere 5cc/min imbalance with number 3 being a little down and the other 4 showing the same flow rate. All were down on the expected flow of a new injector.
Post cleaning all injectors now flow the same, spray pattern improved on 3 of them and there is now no apparent imbalance. Filter baskets and O rings were also changed and the old ones came back in the box.
On the road I no longer have a slight harshness between 5000-5300rpm which i have to say i am surprised at - who would have thought 5cc/min would be enough? Idle is rock solid and weirdly my exhaust note has changed at idle to be slightly more distinctive. This is really hard to describe but there seems to be more definite pulses of combustion noise than before. I am not counting this last thing as an improvement as such, it is just something i noticed which tells me that that the cleaning process has clearly affected my engine and overall for the better.
Well worth the £12.50 per injector i paid and now it is a joy to spin it up to the red line.
Just a quick pic and a review of how I've got on having my Bosch upgrade 7A injectors ultrasonically cleaned.
Injectors installed now for 7 years and 45,000 miles of service. Not mega miles but according to the website of the company who cleaned them; apparently long enough for there to be detrimental deposits.
With no particular concerns over performance that I was hoping to fix, I sent them off mainly out of curiosity.
Results i think were well worth it.
The service sends them back recorded Special delivery and you get a report included showing the flow rate before and after test.
Mine had a mere 5cc/min imbalance with number 3 being a little down and the other 4 showing the same flow rate. All were down on the expected flow of a new injector.
Post cleaning all injectors now flow the same, spray pattern improved on 3 of them and there is now no apparent imbalance. Filter baskets and O rings were also changed and the old ones came back in the box.
On the road I no longer have a slight harshness between 5000-5300rpm which i have to say i am surprised at - who would have thought 5cc/min would be enough? Idle is rock solid and weirdly my exhaust note has changed at idle to be slightly more distinctive. This is really hard to describe but there seems to be more definite pulses of combustion noise than before. I am not counting this last thing as an improvement as such, it is just something i noticed which tells me that that the cleaning process has clearly affected my engine and overall for the better.
Well worth the £12.50 per injector i paid and now it is a joy to spin it up to the red line.
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