 Calling FI Experts, I’m a carb guy trying to help a friend |
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| jdamiano |
 May 18 2019, 06:57 PM
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#1
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Member  Group: Members Posts: 336 Joined: 18-March 18 From: Jacksonville Member No.: 21,981 Region Association: South East States  |
Working on my friends Creamsicle today because it had intermittent cranking and cranking with no start issues. We traced the no crank issues to the ignition switch and finished breaking the no start issues. It just cranks and sounds like it’s gonna go for a second then nothing. Fuel pressure is 28psi while cranking. Fires right up with a squirt of starting fluid and runs off it for a couple seconds then dies. Seems the injectors aren’t firing. Is power for the FI through the ignition switch? Since it’s wonky with cranking I’m thinking maybe it’s bad for other functions.
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| 76-914 |
May 18 2019, 07:01 PM
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#2
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,700 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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QUOTE(jdamiano @ May 18 2019, 05:57 PM)  Working on my friends Creamsicle today because it had intermittent cranking and cranking with no start issues. We traced the no crank issues to the ignition switch and finished breaking the no start issues. It just cranks and sounds like it’s gonna go for a second then nothing. Fuel pressure is 28psi while cranking. Fires right up with a squirt of starting fluid and runs off it for a couple seconds then dies. Seems the injectors aren’t firing. Is power for the FI through the ignition switch? Since it’s wonky with cranking I’m thinking maybe it’s bad for other functions. |
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| BeatNavy |
May 18 2019, 07:12 PM
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#3
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Certified Professional Scapegoat Group: Members Posts: 2,951 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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The trigger point connectors at the back of the dizzy ground the injectors in pairs causing them to "fire." If that connector is disconnected you won't get any fuel, so it won't even attempt to start. I agree, that is the first thing I would check.
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| cary |
May 18 2019, 11:05 PM
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#4
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest
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Plus check the harness grounds. That was my issue once.
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| JeffBowlsby |
May 19 2019, 07:59 AM
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#5
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 8,907 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(BeatNavy @ May 18 2019, 06:12 PM) The trigger point connectors at the back of the dizzy Fixed it for you. The D-Jet FI system is always grounded through the three pairs of wires in the harness, at the top rear of the engine case. Its not a switched ground system. The trigger points provide initiation of the fuel injection pulse. The pulse length is determined by the ECU from inputs of the sensors. |
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