 1973 Porsche 1.7 D-Jet, No power to two injectors |
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| crodog |
 Apr 30 2017, 08:38 AM
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#1
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Newbie  Group: Members Posts: 4 Joined: 19-March 17 From: Wisconsin Member No.: 20,942 Region Association: None  |
I have power to #3 and #4 injectors but not #1 and #2. The car will run but it is missing on 1 & 2. I have spark but when I pull the wires off the injectors nothing happens. After testing more I found I have no power to both of them. Where does the power come from? Do I need to look at the releasing contacts at the base of the distributor?
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| Dave_Darling |
May 1 2017, 09:06 AM
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#2
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914 Idiot Group: Members Posts: 15,000 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Yes, the injectors are opened in two batches. I had the cylinder numbers wrong, but the idea correct--the pairs are diagonally across the engine from each other. If the injectors on one side of the engine aren't opening, then the major suspect is the ground part of the circuit, not the power side. (Or, on the 1/2 side, suspect debris in the fuel clogging up the injectors--those tend to clog up first as they are closer to the pump.)
Verify that the injectors are getting power when the starter is cranking. A test light probably will work for that. Check all four injectors so you can compare the injectors that aren't working to those that are. --DD |
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Posts in this topic
crodog 1973 Porsche 1.7 D-Jet Apr 30 2017, 08:38 AM
larss No1 and 2 have a common spade connector fort earth... Apr 30 2017, 10:57 AM crodog Thx for the info. I will hunt down the grounds. Ma... Apr 30 2017, 11:03 AM
larss
Thx for the info. I will hunt down the grounds. M... Apr 30 2017, 11:14 AM CatDaddy60 I agree that most likely it is a ground issue as t... Apr 30 2017, 12:11 PM Dave_Darling Power to the injectors comes from the ECU. The tr... Apr 30 2017, 12:44 PM crodog
Power to the injectors comes from the ECU. The t... Apr 30 2017, 01:55 PM bdstone914
Power to the injectors comes from the ECU. The ... Apr 30 2017, 02:00 PM larss
Power to the injectors comes from the ECU. The t... Apr 30 2017, 10:56 PM Jeff Bowlsby Actually the injector groups as the ECU see them a... Apr 30 2017, 11:07 PM larss
Actually the injector groups as the ECU see them ... May 1 2017, 12:41 AM Jeff Bowlsby I could be wrong, its been years since I read thes... May 1 2017, 08:07 AM larss Below from the Robert Bosch 914 D-jet manual.
The ... May 1 2017, 08:21 AM larss Agree Dave, I just used a cheap test lamp with LED... May 1 2017, 09:53 AM |
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