[urq] Fuel pump issue fixed / lazy cranking

urq urq at pacbell.net
Mon Sep 28 08:11:10 PDT 2009


Great news, congrats on the find!  It is incredible the sorts of things
people determine they are qualified to do ... my car had similar electrical
"improvements" performed on it by a PO, and that was when the car was only 3
years old!  Of course I have been known to make electrical improvements of
my own ... I'd like to think that they are properly done, and if at all
possible easily reversible ... 

In my case on the Fox I also used a wire that was intended to go to the back
up lights, but I modified the wiring in the box to connect to the fuel pump
circuit fuse.  I don't know how many folks have opened up the fuse/relay
box, it is like a printed circuit board made of shaped metal bars.  

Good find on the battery cable splice ... this is a well known issue on the
type 44 cars, this is the first I've heard of an urq with the same problem.
I think many cars suffer from "lazy" cranking ... sounds like a worthwhile
thing for all owners to check. This sort of splice is not unusual, although
if it really is copper and aluminum it would be a faux pas as a
copper/aluminum junction invites corrosion.  I know the wires are heavy
gauge, so soldering is difficult, but it would guarantee a reliable
connection ... 

Thanks for posting what you have learned.

Steve Buchholz

-----Original Message-----

It's fixed . 

Some previous owner cut off the wire from the fusebox to the to the fuel
pump relay , and 
connected it to the back up light circuit . Who needs backuplights anyway
.... 
Needles to say , that circuit can not nearly deliver enough current .
That's also the reason I couldn't get the pump to run without  the ign
switched on . 

I pulled about a meter of wire , and 4 factory connections behind the
fusebox . 
All connections had that brownisch colour on the edges indicating
overheating . 
So I replaced it all , from the pump to the fusebox to the relay . 
Eliminating as much connections as possible . 

So now I have 11,9 V at the terminals with the pump running .
Current draw is 8,60 A , I think that's acceptable . 
Still gonna do the filters though . 

Finally I did the delivery test . 
It's supposed to pump 1800cc/min . 
I got 1900cc ,so it's all well within spec . 

I think this is  gonna cure most of my problems . 
Especially cause the warm up regulator is also powered off the fuel pump
circuit . 
Guess that didn't get much current either , explaining the pig rich
condition .
 
But as I'm the stubborn kind of guy , I'm still gonna do the rest of the
test scheme and start 
by measuring pressures  at the cis head . 

Pat 
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