[tech] Mk1 16V Update

[drew at scirocco.cs.uoguelph.ca (Drew MacPherson)]

Sal, 9.5 V sounds a little low at the fuel pump.  Too much resistance in
the fuel pump circuit could cause the pump to fail - and could also keep
the pump from producing enough pressure.  Sounds like you have a wiring
problem in the fuel pump harness.  It might be worth running two wires
straight to the pump from +12V and -12V just as a test to see if it helps 
the problem.

Drew




On Sat, 24 May 2003, Sal Guzzo wrote:

> Well...here's an update...
> 
> I now know that I'm having problems with fuel.  A quick review of the problem....my rocco, once warmed
> up, dies and won't start till it has cooled down.
> 
> What I did yesterday....I had my sis' fiance drive my car until it got warm and died out.  When it died,
> I did a coupla things.  I replaced the coil with a new one and nada.  Wouldn't start.  I'm guessing that
> the coil on the car is fine.  I am also running a switched jumper wire so it's not the fuel pump relay
> which is overheating.  In fact, I measured the voltage at the fuel pump.  It's getting 9.5 volts when
> the car is not running.  I'm not sure if that's enough voltage but it sounds like the pump is running.
> 
> While the car was not starting when warm, I checked the fuel pressure...seeing that I don't have a fuel
> pressure gauge, I simply pulled an injector and lifted the plate in the fuel distributor.  With the fuel
> pump switched on, only a lil tiny bit of fuel came out of the injector (almost none at all).  Am I
> correct to assume that I'm having problems with the fuel?  If so, what should I be looking at?  Fuel
> pump was replaced last September and fuel filter was replaced two weeks ago...anything else?  The dealer
> says I prolly have crap in my gas tank, but I can't see how that would cause the car not to run...any
> further ideas?  I greatly appreciate it...thanks.
> 
> Sal Guzzo
> 
> - Fear is your only god.
> 
> 
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