Re: [DML] Control Pressure Regulator/Twin Turbos [long]

["Dave Sontos" <dsontos@xxxx>]

Martin,
There is only one section in my book that deals with High Control Pressure,
and we are "ASSuming that", without the use of pressure gauges. Here it is:

Symptom:
Cold control pressure high
Warm control pressure high
System pressure normal
Rest pressure normal

Possible cause:
Restriction in the return line from the Control Pressure Regulator.
Defective Control Pressure Regulator

To distinguish between these install a replacement return line on the
Control Pressure Regulator, allowing the fuel to flow into an approved fuel
container. If the Control Pressure drops, then repair/replace the return
line. If the control pressure does not drop then replace the Control
Pressure Regulator.

If this doesn't fix the problem then you need to buy a fuel pressure guage
and take some readings. Have you replaced the fuel filter yet??

ALWAYS keep a fire extinguisher nearby when working with the fuel system.

Dave Sontos
vin 02573
----- Original Message -----
From: "Martin Gutkowski" <webmaster@xxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Monday, February 11, 2002 5:18 AM
Subject: [DML] Control Pressure Regulator/Twin Turbos [long]


I drove about 600 miles with Rich's CPR
> in my D, and it progresively got more and more difficult to start, and
> ran more and more roughly while warming up. Until one evening when the
> car wouldn't start at all. It wouldn't even fire on a single cylinder.
> On examination, the air flow sensor was extremely stiff to depress. When
> I loosened the Control Pressure line (the one from the top of the
> metering head to the CPR), the metering head plunger moved freely again
> and the air flow sensor loosened up (petrol leaked from the loosened
> line unsurprisingly).