[T3] Fuel pump isn't working.
w.jeff.palmer at icloud.com
Tue Nov 2 21:21:07 PDT 2021
Sorry if I wasn’t clear! I think I said ’toggling’ not ‘wiggling’ and by that I meant repeatedly turning it on and off. Maybe we are saying the same thing :)
> On Nov 1, 2021, at 5:40 PM, David Hall <dave at hallvw.clara.co.uk> wrote:
> Could it also be an intermittent contact in the ignition/starter switch, as he says wiggling it sometimes helps?
> UK VW Type 3&4 Club.
>> On 1 Nov 2021, at 17:22, Jim Adney <jadney at vwtype3.org> wrote:
>> On 1 Nov 2021 at 8:21, Jeff Palmer wrote:
>>> Hi everyone - 69 automatic notchback parked for the winter ... it hasn´t run in about 15 years but we got it going this summer.
>>> The fuel pump seems to run intermittently and if I recall I had the same issue 15 years ago but my memory is fading. The problem seems to be that sometimes the pump won´t run with the key in the `on´ position but will run when it is returned to the `off´ position. A little bit of toggling will get it to operate properly - sometimes. It seems to be accompanied by a clicking under the dash - a relay of some sort? Are these items related and if so is there an obvious solution? New relay? Cleanin grounds? New fuel pump? llof the above??
>> This is a rather unusual set of symptoms, but they might be fixed in a couple
>> ways. It sounds like your pump might be okay, but may need some
>> "exercise" to get it back in shape. That's something that we can't fix unless
>> we can get it to run more often. I have two recommendations for that.
>> First, there is a grounding problem in the '68-9 cars that affects the fuel
>> pump. I started making kits to fix this a few years ago. The kits are only $10
>> and include some wiring and complete instructions to fix the grounding
>> issue. Every '68-9 Type 3 would benefit from this.
>> Second, I have two kinds of fuel pump priming switches, which can be used
>> to run the pumps independent of the FI controls. The cheap kit is $10 for a
>> simple pushbutton; the better kit is $30 for a 3 position (Off, Normal, (Prime))
>> HD toggle switch. Both include mounting bracket, necessary wiring, and
>> complete instructions.
>> Yes, there is a relay under the dash that controls the fuel pump. You might
>> start by listening when you turn the key ON. You should hear a relay click
>> when the key comes ON and a second click ~1 second later. If you don't
>> hear both clicks, the first thing to check is the relay under the back seat
>> behind the driver seat. That relay should have a ground wire hooked under
>> the screw that mounts the relay. Make SURE that screw is tight, so that wire
>> has a good ground.
>> Check those things and get back to us.
>> Jim Adney, jadney at vwtype3.org
>> Madison, Wisconsin, USA
>> VWType3.Org mailing list - type3 at vwtype3.org
>> To unsubscribe or change subscription options, visit:
>> If you need more help, contact: gregm at vwtype3.org
> VWType3.Org mailing list - type3 at vwtype3.org
> To unsubscribe or change subscription options, visit:
> If you need more help, contact: gregm at vwtype3.org
More information about the type3-vwtype3.org