| | List |
| Subject: | Re: Which Fuel Pump Relay should I use? |
| Poster: | NateNagelnjnagel@roosters.net |
| Date: | Wed, 21 Mar 2007 19:42:20 -0400 |
| Related Postings: | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
Steve Austin wrote:
> N8N wrote:
>
>> On Mar 21, 9:13 am, aarcuda69062 wrote:
>>
>>> In article ,
>>> "Scott Kelley" wrote:
>>>
>>>
>>>> I am putting an electric fuel pump into an older car & want to use a
>>>> fuel
>>>> pump relay that will sense when the engine quits and shut off the
>>>> pump. I
>>>> know that many vehicles had this type of relay.
>>>
>>>
>>>> I'll probably get something out of a wrecking yard - I would prefer
>>>> to get a
>>>> relay AND socket. Any suggestions as to what vehicles to steal this
>>>> from?
>>>> Reliability & availability are the two obvious issues that come to
>>>> mind.
>>>
>>>
>>> Late 80s early 90s GM or Ford truck
>>>
>>>
>>>> Again, I'm not looking for a normal relay, but a "fuel pump relay" that
>>>> remains active only as long as it is receiving pulses from the ignition
>>>> tachometer line.
>>>
>>>
>>> Are you building a relay control circuit that responds to the
>>> tach pulses or do you think that a relay can literally be run
>>> from the coil negative?
>>> The latter isn't going to work.
>>> Running thru an oil pressure switch would work much better.
>>
>>
>>
>> I don't like the oil pressure switch idea simply because there may be
>> situations where you make the educated decision to fry your engine to
>> get out of harm's way. but that's just me.
>>
>> The VW relay works like this; when power is applied to it (i.e. you
>> turn the key on) it will run for 5 seconds and then shut itself off -
>> this pressurizes the fuel rail for initial startup. Then when it
>> starts receiving pulses from the coil, it will latch in until it no
>> longer receives a signal from the coil.
>>
>> nate
>>
> What model and year would this relay be on?
Any Golf, Jetta, Scirocco, or Corrado with fuel injection up until at
least the late 80's.
nate
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