Compression Ford Focus 1.6 TDCI

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Compression Ford Focus 1.6 TDCI

Postby victor2k » Sat Sep 30, 2017 9:25 pm

Hello,
I have a 2008 Ford Focus with a bad start,white smoke and irregular idle .
At the first check injectors 1,2 and 3 have leaks on return.
Checking the pressure on the return wasn't a step forward...but I lost the recording because of my laptop issue :(
The injectors was checked on a diesel bank and again 1,2 and 3 not passed the test :(
Today I received my new adapter and measuring the compression I see something strange...on some cylinders the compression increase ,on other cylinders the compression decrease...
The engine was cold,injection was disabled,the injectors was removed from engine,all recordings was made in 3-5 minutes.
Any advice is wellcome.
Attachments
Ford_Focus_2007_Diesel_20170930-0006.psdata
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Ford_Focus_2007_Diesel_20170930-0005.psdata
(746.45 KiB) Downloaded 29 times
Ford_Focus_2007_Diesel_20170930-0002.psdata
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Last edited by victor2k on Sun Oct 01, 2017 11:03 am, edited 3 times in total.
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Re: Compression Ford Focus 1.6 TDCI

Postby STC » Sun Oct 01, 2017 2:40 am

If the injector(s) are not sealing at the return ball bearing then compression will be affected. for now it is just an area to explore. I have seen Compression leak in to the Injector return
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Re: Compression Ford Focus 1.6 TDCI

Postby victor2k » Sun Oct 01, 2017 3:07 pm

Hello,
Today I made some new measurements:WPS body+hose+adapter(measured at 6ml) have 14 ml.
But... Compression test /Pico Diagnostics give me 3 different results at 3 measurements.What I can see in Raw Data is some noise at the battery voltage!All 3 measurements was done with the same setup,one after another!Why the results is different?Maybe some filters will remove the noise from raw data...
Thank you
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Re: Compression Ford Focus 1.6 TDCI

Postby STC » Sun Oct 01, 2017 10:39 pm

Pico Diagnostics give me 3 different results


Stop using that solution.

Use raw data
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Re: Compression Ford Focus 1.6 TDCI

Postby victor2k » Mon Oct 02, 2017 9:06 am

STC wrote:Stop using that solution.


Hello,
This solution can't be improved?\
Or is more like...don't use this solution if you don't like it? :?
Thank you.
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Re: Compression Ford Focus 1.6 TDCI

Postby Technician » Mon Oct 02, 2017 10:53 pm

The injector signal(s), where is cylinder 2!
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