4000Q Fuel Q: FPR or fuel distributor

[Tony Hoffman]

Scott,
 
You can take it off and clean it out if you want. I've doon this several ltimes with 100% success. Take the two screws out, and unplug it. Spray carb cleaner into the two holes in it. Also, spray into the fuel distributor opposite the two holes. Then, put it back together and see what happens. On one occasion, I had to do this twice in addition to pulling the plunger out of the fuel distributor.
 
Tony Hoffman

SuffolkD at aol.com wrote:
1986 4000Q.
Investigating the Bentley I find my two items of interest:
Page 20.9 has an exploded view of the CIS-E
then on 25.73 the fuel distributor is broken down.

The two screw thingy is the Differential pressure regulator
and the Fuel pressure regulator is a diaphragm pressure 
regulator................
off for testing............
PREVIOUSLY,
Quick Q about the two screw thingy on the front of the 4000 Q JT engine fuel 
distributor.
Family Album doesn't clearly show the exact part number
1986: MG 1 SG 33 Ill 19-00
1A Pressure regulator PN# 026 133 482
or
7A Potentiometer for ECU cars PN# 035 133 472B

Which is the the two screw thingy? facing the front of the car?
Is this NLA or does anyone have a replacement/used one?  
-Scott by BOSTON
car running rough w/ hestitation in the lower RPM and poor power.
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