Re: 5KCS - The saga continues

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <3739F884.46BC38C1@cyrix.com> Steve Sherman writes:

> Now the problem seems not only be hard starting and low rpm idle,
> leading to a stall; but also an occassional low power situation at high
> rpm as well. (My wife's happy that I've seen this, as she had reported
> it to me, but I had never seen it until now). When it occurs it is all
> one I can do to keep the engine from stalling.  A floored pedal will
> keep things running at 4k rpm, but at very reduced power...

> At home the car stalled as soon as I took my foot off the gas.  Diag
> codes were 4444, eg no problem.

> ... going over bumps makes me wonder a bit.

It's a fuel pressure problem.  Either control is going high or system
is going low.  The former sometimes causes increased weeping from the
bottom of the fuel metering head plunger.  Your cars are differently
rigged to ours (differential regulator, etc) but the end result at the
metering head is much the same.

My guess would be control going high.  I usually debug this by attaching
the fuel pressure gauge and then twisting it down in front of the metering
head and tie-wrapping it in position.  Then wait until the symptoms
occur, leap out and read the pressure.  I caught a JS engine at 4.1 bar
control this way only last week.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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