No power to injectors again!, Got spark, gas, at a total loss |
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No power to injectors again!, Got spark, gas, at a total loss |
surfdogskier |
Oct 7 2019, 06:22 PM
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#1
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Member Group: Members Posts: 164 Joined: 20-May 16 From: East TN Member No.: 20,019 Region Association: None |
Oh my gosh!!!! She is back to doing this same thing all over again. I finally got her running . She ran fine one evening, parked her. Next day she would not start. No power to the injectors. I got spark. I got gas in the lines. Fuel pump works like it should. I took the distributor out and cleaned the trigger points to see if that would help. All wires are connected. MPS connected. All vacuum lines connected. I bought a noid light set up and they are definitely not getting power.
What else could it be? Something on the relay board? Bad relay? This car is driving me insane. I am about to go duel carbs and drop this piece of **** fuel injection if I can't get this thing running. |
JeffBowlsby |
Oct 8 2019, 07:12 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,485 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Then you have power to the ECU. Somewhere between the harness plug and the 2 wire injector connectors is the discontinuity. The trigger points initiate the voltage pulse to the injectors. The ECU processes the several engine sensors to determine the pulse width. No power to the injectors at idle could be worn out trigger points, a bad ECU, disconnected injector grounds, bad harness wiring. Maybe more. I would check the trigger points as has been mentioned, use an ohmmeter. Pull the dizzy, or check it in the car while cranking. You are looking for alternating continuity between the center pole and each of the two outer poles as the diz is rotated. No continuity, no pulse, no voltage, noid light no worky.
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surfdogskier |
Oct 9 2019, 07:09 PM
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#3
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Member Group: Members Posts: 164 Joined: 20-May 16 From: East TN Member No.: 20,019 Region Association: None |
Then you have power to the ECU. Somewhere between the harness plug and the 2 wire injector connectors is the discontinuity. The trigger points initiate the voltage pulse to the injectors. The ECU processes the several engine sensors to determine the pulse width. No power to the injectors at idle could be worn out trigger points, a bad ECU, disconnected injector grounds, bad harness wiring. Maybe more. I would check the trigger points as has been mentioned, use an ohmmeter. Pull the dizzy, or check it in the car while cranking. You are looking for alternating continuity between the center pole and each of the two outer poles as the diz is rotated. No continuity, no pulse, no voltage, noid light no worky. Trigger points have continuity. Tested with a ohm meter. That eliminates that. And they are very clean when I pulled them them the first time. |
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