[Healeys] Strange Problem

[trifari]

Agree:  I had a similar problem with  my BJ8.  Clogged fuel filter.  John 
Trifari   Golden Gate AHC
----- Original Message ----- 
From: "Alan Seigrist" <healey.nut at gmail.com>
To: "Michael Salter" <msalter at precisionsportscar.com>
Cc: <healeys at autox.team.net>
Sent: Sunday, May 11, 2008 6:41 PM
Subject: Re: [Healeys] Strange Problem


> Nick -
>
> Michael is pretty much a guru here, but his point 1. is off because the 
> HD8
> carbs on your BJ8 are fixed together with a fixed attachment so you can't
> have one carb valve opening and the other stays closed with a Mk III - 
> they
> will both open and close at the same time, always.  Only earlier Healeys 
> had
> this problem.
>
> I might suggest also, as an alternative, that it sounds like your car is
> having a classic fuel starvation problem - when sitting at idle the fuel
> pump pushes just enough gas in to keep the car idling and you can rev the
> motor, but as soon as you start getting going your car needs more fuel and
> loses all power because the pump can't keep up with demand.  Usually this
> symptom will manifest itself if you've had some hesitation or loss of 
> power
> going up steep hills receently, than this is your problem.
>
> Usually what causes this is:
>
> 1) a fuel line blockage (pull off the fuel feed pipe to the carbs and turn
> on the iginition - you should have a very steady thoughput of fuel, if 
> it's
> just  a trickle, then this is your problem).
> 2) a clogged filter (if you have one inline, replace it.. also pop the 
> tops
> off the carb float chambers and check for gook and crud - if there is 
> any -
> clean everything including the float needles)
> 3) a bad fuel pump.  It is rarely diagnosed as such, but over time rust 
> from
> your fuel tank can aggregate in your fuel pump and reduce its performance.
>
> Good Luck!
>
> Alan
>
>
> On Mon, May 12, 2008 at 7:57 AM, Michael Salter <
> msalter at precisionsportscar.com> wrote:
>
>> Hi Nick,
>> I would bet that your impression that it is running on 3 cylinders is
>> correct.
>> I would suggest the following:
>> 1. Have someone push down on the throttle while you check that the
>> butterflies are actually opening, sometimes the clamps slip on the 
>> shafts.
>> 2. Drive a short distance at full throttle then turn off the key, after
>> stopping, remove the float chamber lids and check that there is fuel in
>> each
>> float chamber.
>> 3. Remove the carb suction chambers and then, using a piece of tube, blow
>> into the overflow tubes for each carb, fuel should squirt out of the jet.
>> 4. while the suction chamber is off see if you can pull the metering 
>> needle
>> out of the piston. Sometimes the locking screw comes loose.
>>
>> Michael Salter
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