Date: Wed, 18 Jul 2007 10:22:09 -0600
Reply-To: Don Spence <dkspence@TELUS.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Spence <dkspence@TELUS.NET>
Subject: Re: No Start 83.5: Fuel pump test?
In-Reply-To: <BAY125-F386891882F9AA696068B0AA0FA0@phx.gbl>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Dennis
Thanks for the reply. A little history on my problem:
The vehicle ran last fall when I parked it - November - Though it
had a tendency to stall at idle as in at a red light and not restart
until it had a ten minute rest in hot weather (+28 C and above)
When I tried to start it in April it would crank but not fire.
I tested for spark at the plugs- good ( entire ignition is new
except distributor. new cap, HT leads, plugs, coil)
Grounds had been cleaned the previous summer and were re-cleaned
I removed the small hose connected to the intake and squirted some
fuel in. It fired immediately, ran for a couple of seconds and
died. No fuel being delivered?
I went on vacation for May
I pulled the injector leads and noid tested them. All fine
I pulled the injectors and while one fuel rail was disconnected ran
the fuel pump by turning the key to the on position several times. No
fuel in my collection container.
I also removed the bolt at the Tee fitting and ran the pump as
above . No fuel. I had expected a geyser.
The fuel flow test described in the workshop manual (original)
suggests that 500 ml of fuel should be collected in 30 seconds from
the return spigot of the pressure regulator. I got 25 to 40 ml.
I will try the volume test again at the firewall fitting and at the
supply side of the tee.
Any insights to offer?
Thanks
Don
On 18-Jul-07, at 6:21 AM, Dennis Haynes wrote:
> Why go through troubleshooting extremes? Did you check the fuel
> pressure at the tee? If you got anywhere near the proper pressure
> there, fuel is not your problem. Yes, the return from the regulator
> will flow a lot less than an open pump. After you get the engine
> started, check the pressure again with the engine at various
> speeds. It will be obvious if the pump can not keep up. Usual
> restriction is in the suction screen in the tank.
>
> Dennis
>
>
>> From: Don Spence <dkspence@TELUS.NET>
>> Reply-To: dkspence@TELUS.NET
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: No Start 83.5: Fuel pump test?
>> Date: Tue, 17 Jul 2007 23:50:14 -0600
>>
>> The saga continues ...
>>
>> I did two fuel pump volume tests today, one at the pump and one at
>> the return outlet of the fuel pressure regulator. Direct from the
>> pump 30 seconds running delivered over 750 ml of fuel. At the fuel
>> pressure regulator return fitting only 25 to 40 ml ( I did this one
>> three times).
>>
>> I then blew out the fuel line, engine to pump, with 40 psi compressed
>> air. Still only 25 ml. I'm thinking I have a clogged fuel line..
>> Make sense?
>>
>> What's involved in replacing this?
>> TIA
>> Don
>
>
