Turning fuel up on 940 Turbodiesel.

Turning fuel up on 940 Turbodiesel.

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busta

Original Poster:

4,504 posts

234 months

Monday 9th June 2008
quotequote all
Evening all.

Does anyone know which is the fuel screw on a 940 2.4 TD fuel pump? I've upped the boost slightly but I'm getting zero black smoke so I think its running lean.

Is it the screw right on top of the pump, in the middle of what looks like an enclosed diaphram type thing? There was a tuning guide on the old volvo forums but obviously I can;t get to it now.

busta

Original Poster:

4,504 posts

234 months

Friday 13th June 2008
quotequote all
Found it.

Just for reference, it's on the front of the pump, half way down with an inconspicuous plastic sleeve over it.

Winding it in a bit has made the world of difference to my car. It pulls better at lower revs and the turbo spools up a few hundred RPM sooner. Now for more boost...