 EFI Fuel Pump Question, Fuel pump doesn't run |
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| chris914 |
 Jul 1 2014, 10:34 PM
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Member  Group: Members Posts: 489 Joined: 24-July 04 From: San Diego, CA Member No.: 2,393 Region Association: Southern California  |
When I turn the ignition on the pump doesn't run. It's a stock 74 2.0L.
Are the two wires connected to the pump +/- 12 volts? I used a multimeter and there doesn't seem to be any voltage going to the pump. Is there a relay that supplies voltage or does it come from the ignition switch. I did check the fuses and made sure they were seated. Thanks! |
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| sixnotfour |
Jul 2 2014, 06:26 PM
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914 Wizard Group: Members Posts: 10,440 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains 
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The pumps usually either work or they don't. The pump runs whenever the ignition switch is in the on or start position and the engine is turning. The AFM has a microswitch which is activated as soon as the AFM's door moves. This microswitch allows the fuel pump to run. This is a feature designed to prevent flooding and for safety. The idea here is that if the engine is not running then the AFM door will be closed and the fuel pump will not run regardless of ignition switch position.
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Posts in this topic
chris914 EFI Fuel Pump Question Jul 1 2014, 10:34 PM
Mike Bellis The stock 914 FI does not have a priming cycle lik... Jul 1 2014, 10:37 PM
chris914
The stock 914 FI does not have a priming cycle li... Jul 1 2014, 10:48 PM
Cap'n Krusty
The stock 914 FI does not have a priming cycle li... Jul 2 2014, 08:47 AM Tom The fuel pump gets it's power thru the fuel pu... Jul 2 2014, 12:20 AM ClayPerrine On a D-Jet car, the fuel pump will run for 2 secon... Jul 2 2014, 03:50 AM JawjaPorsche
On a D-Jet car, the fuel pump will run for 2 seco... Jul 2 2014, 04:15 AM MikeM What a great response from Clay Perrine.... Jul 2 2014, 07:31 AM Dave_Darling Not quite every way... The trigger points do prov... Jul 2 2014, 11:51 AM Tom sixnotfour.
That is only true for L-Jet.
... Jul 2 2014, 08:24 PM |
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