Fuel Pressure Levels 325i

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PG325
E30 Zone Camper
E30 Zone Camper
Posts: 1194
Joined: Sat Jun 06, 2009 11:00 pm

Post Mon May 30, 2022 7:16 pm

I managed to source a new old stock Bosch 3.0 bar FPR recently for a very good price, and fitted it.

Since then I've suffered with hesitation whilst driving, so swapped the old one back and that seems to have cured the issue.

Whilst I was doing all this I measured the pressure of the old regulator and it sat at 3 bar whilst idling and move ever so slightly when bliping the throttle, I assume these is the correct pressure and characteristics off idle. However, I could only get 3 bar if I removed the hose which attaches the FPR to the manifold, with the hose attached it was registering 2.4 bar, does this sound right, or is the old FPR actually faulty?
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paultv
E30 Zone Squatter
E30 Zone Squatter
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Location: Auf dem Schnee: Germany

Post Mon May 30, 2022 7:40 pm

This is absolutely correct behaviour for a 325i.

Paul :-)
4th May 1990 325i Convertible.

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