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Allowed injector fuel delivery difference?

 
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morghen  



Joined: 21 Jan 2005
Posts: 7838
Location: Romania

PostPosted: Sun Oct 01, 2017 4:07 am    Post subject: Allowed injector fuel delivery difference? Reply with quote

Chasing an issue on high boost and high rpm, 1.1bar and above 4500rpm only happening at wot, at 75% pedal its nice and smooth.
So i tested the injectors today...the pattern is a bit dodgy but nothing catastrophical...i was looking for some clear indications but found little until now.
1 and 4 put out about 7-8% less fuel than 2 and 3.
1: 245g
2: 262g
3: 257g
4: 244g
I'd have to check if amount drops or stops climbing with higher plate lift.

Opinions?
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gerben1986  



Joined: 13 Mar 2008
Posts: 216
Location: The Netherlands

PostPosted: Sun Oct 01, 2017 4:59 am    Post subject: Reply with quote

I remember that in the Haynes is stated what the allowed difference in fuel delivery is.
But I don't have the Haynes overhere at the moment. Maybe you could have a look overthere?
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morghen  



Joined: 21 Jan 2005
Posts: 7838
Location: Romania

PostPosted: Sun Oct 01, 2017 6:42 am    Post subject: Reply with quote

Thanks, i had a haynes but managed to loose it
I'll have a look on the internets.
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924-76  



Joined: 05 Jun 2006
Posts: 1355
Location: Ontario, Canada

PostPosted: Sun Oct 01, 2017 1:06 pm    Post subject: Reply with quote

The info in the Haynes manual ( page 78 ) is for the N/A and mentioned to run the 4 injector until 1 reach 100 cc and then the other 3 should have more than 85 cc.
So, no more than 15% between the highest and lower.

You have 6.9% difference between the highest and lower, sounds good to me.



BTW, let me know if you are looking for a set of factory manual, including the turbo manual.

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