| | List |
| Subject: | Re: Which Fuel Pump Relay should I use? |
| Poster: | SteveAustinsaustin4@twcny.rr.com |
| Date: | Wed, 21 Mar 2007 19:27:17 -0500 |
| Related Postings: | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
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?
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