Re: electrical problems relating to fuel pump

[joelpash@xxxx]

The workshop manual calls the Fuel pump relay the RPM relay and it 
calls the lambda relay the main fuel relay sometimes. So when I said 
main fuel relay, I am referring to the Lambda relay. I replaced both 
of those relays, and it still does not work. 

You are correct. When I jump the wires I get 12 volts. I get 4 when 
the purple/white is not jumped. 

I was fairly certain that the problem was not related to the fuel 
pump, but on of the circuits that feeds the rpm or the lambda relay. 
I have spent several hours checking all wires though and I can't find 
anything. And to make matters more complicated, it has started a few 
times in between all of my testing. I am not sure where to look next.

Joel

--- In dmcnews@xxxxxxxxxxx, "DMC Joe" <dmcjoe@xxxx> wrote:
> If you jumped the RPM relay, as you said you did, and you can hear 
the fuel pump running, that indicates that all is well with the fuel 
pump. The fuel pump needs at least 9 volts to operate therefore it is 
unlikely that you have only 4 VDC at the pump. You keep mentioning 
the main fuel relay; the RPM relay is the main fuel or fuel pump 
relay.
> 
> Once again; repeat the brown to white/purple jump test. The brown 
wire is 12 volts hot to the battery, therefore you should also see 12 
VDC at the white/purple wire.
> 
> If the fuel pump runs when the RPM relay is jumped and the car will 
not start you have a problem other than the fuel pump.
> 
> "We're here to help you"
> 
> DMC Help / De Lorean Services / <dmchelp@xxxx>
> Web Site: <www.deloreanservices.com>
> 
> 
> 
> [Non-text portions of this message have been removed]