 My FI Frustrations Continue, Still have engine cutting out |
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| 914_teener |
 Jun 19 2019, 07:06 PM
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#21
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914 Guru  Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California  |
So dumb question......
Where is your fuel pump located? Post a pic |
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| Dave_Darling |
Jun 20 2019, 04:55 PM
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#22
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914 Idiot Group: Members Posts: 14,982 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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QUOTE(dralf @ Jun 19 2019, 04:06 PM)  I now am trying to study what activates [the fuel pump] relay. A couple of things. First, the FI Power Supply relay provides power to it; that is triggered by the ignition switch being in the "run" or "start" positions. Second, the FI ECU provides the ground that switches on the pump relay. It does that based on several criteria, notably "is the starter cranking" and "are the trigger points closing periodically". The power that the relay switches is provided by one of the two fuses on the relay board; I forget which one. The fuel pump circuit also powers the Aux Air Valve. It might be worth unplugging that and isolating the wire just to take it out of the equation. --DD |
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| Geezer914 |
Jun 21 2019, 06:43 AM
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#23
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Geezer914 Group: Members Posts: 1,393 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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If the engine cuts out, it's an electrical issue. Pull the FI harness and check the wires for continuity while moving the wires. I had to replace a few wires that were cracked and brittle.
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