Re: [alfa] HELP! Fuel pump problem?? 1978 Spider Veloce

[webb.p@xxxxxxxxxxx]

A couple of possiblities:

Clogged fuel filter.   Becomes fuel starved.  When you shut the car off, the 
filter junk flows back up, then the pump reprimes the float bowls.

Sediment in the fuel tank.   When you shut the car off, the junk floats to the 
top and clears the line.

Check to see if it behaves differently on a full tank of fuel.   

-Peter

> Hi, I am new to Alfas and their intricacies - but my car was left for
> 2 weeks while we were abroad, and now it is playing up!  It ran fine
> prior to sitting in the garage - although I have only had it for a
> couple of months now.
> 
> It is a 1978 Cali. Import 2000 Spider Veloce with the Spica FI ripped
> out and replace with Dellorto 40 DHLA carbs, the mechanical fuel pump
> position is blanked off, and an SU electric fuel pump is fitted on the
> rear crossmember.
> 
> Symptoms:
> Runs fine for between 5-10 miles - then much back firing upon
> deceleration (fuel cut off related???), and finally conking out
> altogether.
> However if I then turn the key off then on again, the fuel pump can be
> heard going like the clappers to prime the carbs, and I can drive
> again for a seemingly random amount of time until we start the process
> again.
> 
> So any ideas? Does the backfiring indicate over rich - too much fuel
> being pumped thru' the carbs - where do I start [ well where does my
> husband start actually ;-) ]
> 
> We think it could be the fuel pump, should there be a cut off solenoid
> on the pump itself??
> Or the carbs set over-rich (although the previous owner did say they
> were set 'lean' to pass the MOT emissions test here in the UK, and we
> haven't played with them yet.
> 
> 
> I would be very grateful if people here could give me any advice!
> Thanks a lot,
> Nicky
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