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Hello all, hope someone with some experience in the area might be able to shed some light on this?
Yesterday I received 4 brand new genuine Bosch EDEV5.1 injectors (hologram intact and I checked the barcodes online).
The very first thing I did was stick them in our injector tester. There is an almost 10% difference between the highest and lowest flow rates. Is this normal? Seems odd to me.
For example, 2min high speed test at 3bar gave the following results:
#1 75cc #2 78cc #3 82cc #4 76cc
Also 1.5min @ 6bar:
#1 74cc #2 78cc #3 82cc #4 76cc
Are my settings wrong on the tester maybe? See attached photo.
They will be going into a MK6 Golf GTI 2.0TSI. The car will be going for tuning soon.
Ultimately does it really matter if it is compensated for it with individual cylinder fuel trims? I was thinking to do some more testing and let the tuner know the percentage difference for each injector?
Attached Files
PXL_20250714_203735397.jpg
- PXL_20250714_212929903.jpg
I am not familiar with that machine, and the displays don't indicate any units. But if your pulse width is only 2ms, you may be operating in the non-linear range of those injectors. What happens if you run shorter tests with longer open times (say 6-8 ms)?
Appreciate the input Dave Ferguson, I'll do that, thank you.
