[urq] Warm up regulator mod question

[RICHARD SIMMONS]

Glad your back we might get some sensible suggestions now

!!!

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On
Behalf Of Phil Payne
Sent: 01 December 2003 16:05
To: urq at audifans.com
Subject: Re: [urq] Warm up regulator mod question

> Engine is running lean, therefore stumbling and not enough vacuum to
raise
airflow plate which is flapping around.  He has lots of experience with
old
VW rabbits, etc. and said that they used to mod the warmup regulator a
bit.  Apparently there's a press fit plug in the regulator that rides
against a bimetallic spring that sets the static cold pressure.  The
heating element in the warm up regulator changes the state of this
spring
and pressures increase/flows decrease.  They used to press the plug
further
into the regulator to reduce cold pressure and improve cold running.

> He claims it's something that the vw repair people realized and bosch
sort
of knew about.  Instead, bosch wants to sell you a new warm up
regulator.

If the warm-up regulator is defective, it will cause incorrect fuel
pressures and these can
cause all sorts of problems.

However - the proper approach is not to guess but to measure - in ths
case the fuel pressures.
Quite easy to do.

Otherwise you run the risk of buying a warm-up regulator that you don't
need, finding it
doesn't solve the problem, and then finding yourself standing in this
guy's shop with another
pocket full of hard-earned dollars.

--
  Phil Payne
  http://www.isham-research.com
  +44 7785 302 803

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