Location: Melton Mowbray, UK
Posts: 151
My VIN: #10719 JAN 82, Grey Interior.
Club(s):
Yep, bit of a strange one. Everything is running perfectly, but I noticed the other day that, with the engine NOT running and the key turned to to position one (the point just before cranking the engine, and when the dials come alive) if I pull the stick towards me, flashing the main beams, the fuel pump runs/primes. This is with the light switch in the OFF position.
Is this normal, or just a oddity of my car? Maybe I've discovered a way to get the pump to prime every time.
Location: Sacramento-ish
Posts: 4,408
My VIN: 02100
Club(s): (NCDMC) (DCUK)
I assume you have the original RPM relay. These are not terribly reliable or predictable as to what they will do. The voltage variation caused by flashing the lights in your car must be enough to convince it to prime.Originally Posted by flux3d
Yep, bit of a strange one. Everything is running perfectly, but I noticed the other day that, with the engine NOT running and the key turned to to position one (the point just before cranking the engine, and when the dials come alive) if I pull the stick towards me, flashing the main beams, the fuel pump runs/primes. This is with the light switch in the OFF position.
Is this normal, or just a oddity of my car? Maybe I've discovered a way to get the pump to prime every time.
If you get Dave's solid state one it will prime reliably every time.
Jon
1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
restoration log, March 2011 to present
full and detailed photo restoration log
Location: South Jersey
Posts: 147
My VIN: 4245
Club(s): (DMA)
Sounds like a cool feature to me.
I am still working my way through my service manuals. What in the world would cause this? I can't say I've ever tried it.
Location: South Jersey
Posts: 147
My VIN: 4245
Club(s): (DMA)
There ya go.
Location: Taylors SC
Posts: 5,326
My VIN: (former)05429
Club(s): (DMWC) (DCUK)
Move the large bundle of wires at the back of the engine away from the ignition distributor.
Dave S
DMC Midwest - retired but helping
Greenville SC
Location: Leonardtown, MD
Posts: 9,008
My VIN: 03572
Step on the gas and it will prime also if you don't have that cap on the idle switch. It's just getting a pulse on the ignition wire.
Location: Adelaide
Posts: 943
My VIN: 6679
You've also got to watch out for low level ionic pulses
Chris
Posts: 261
My VIN: 16811
And Photon Torpedos! What a cool feature your car has. Flash the main beams to dump fuel and kick in the afterburner!
Location: Belfast
Posts: 158
My VIN: 4087
Club(s): (DOC-UK)
Mine does this too. I'll have a look at the wiring that Dave mentioned above.
Location: Melton Mowbray, UK
Posts: 151
My VIN: #10719 JAN 82, Grey Interior.
Club(s):
lol, it sure is a cool feature. I think I'll keep it as it is for the moment. Adds to the character a bit, without causing any problems..... I hope.
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Dave M vin 03572