Injector pulse help, Two are not firing |
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Injector pulse help, Two are not firing |
72914wrx |
Dec 11 2020, 10:13 PM
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#1
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Member Group: Members Posts: 86 Joined: 5-January 15 From: Fresno Member No.: 18,298 Region Association: None |
Ok folks looking for a little help on my 914 74 914 2.0 car . I have two injectors not firing
2 and 3 . I’ve checked the fuel injection points at the bottom of the dissy they check out . Check with a voltmeter and open and close on both sides . I then checked continuity for wires 21 12 and 22 going to the ecu . I found wires 12 and 22 switch when checking for continuity . The plug and been fixed years ago by looking at the repair. Switching the wires made no difference in injector firing still the same . The efi had just been gone though by a reputable shop that is well know just before I bought the car . The following work was done new intake boots , new injectors , rebuild manifold pressure sensor . Rebuilt ecu , new tigger point for injectors. . I’ve checked all grounds on the rear of the motor. To top this off the fuel pump stopped running but the relays are triggered. I need to check power down at the point . What I’m I missing ? |
72914wrx |
Dec 12 2020, 09:56 AM
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#2
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Member Group: Members Posts: 86 Joined: 5-January 15 From: Fresno Member No.: 18,298 Region Association: None |
When the car is not running key on I move the tps and only have two injectors firing 1 and 4 . Could it still be the trigger points? Or is the tps out of adjustment?
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JamesM |
Dec 12 2020, 10:02 AM
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#3
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Senior Member Group: Members Posts: 1,915 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
When the car is not running key on I move the tps and only have two injectors firing 1 and 4 . Could it still be the trigger points? Or is the tps out of adjustment? Check your grounds at the engine case. One wire of the injector is switched power from the ECU the other side is direct to ground. |
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