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Old 09-26-2012, 06:59 PM
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drivinfaster drivinfaster is offline
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Location: in the sticks you piney
Join Date: Nov 2007
Posts: 12,240
Mein Auto: rescued bmw's
Originally Posted by FenderBender View Post
Patiently awaiting Df and his knowledge.

Sent from my ADR6400L using Bimmer App

k, seriously...

ok, for real this time....

without going back and re-reading the pages, this thing will not idle or accelerate on its own.

ran better with the return line pinched off.

this indicates fuel related.

the fuel pressure dropping like a rock when shut down indicates a faulty check valve if the return line is pinched off.

fpr would not cause this issue. at least not that i am aware of.

how do the plugs look now??

did you take a vacuum reading??

you *could* have a restriction in the exhaust. a quick and easy wayo to check would be to remove the o2. if it runs better then suspect a restricted exhaust, most likely the substrate in the cat. or pieces of said substrate in the muffler...(no, won;t affect the fuel pressure dropping off like in the vid...)

so i'd check that.

i'd also get a fuel pump that doesn't have a fault check valve.

better now??

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