 Injectors clicking |
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| JPA914 |
 Jun 23 2016, 07:37 PM
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#1
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Member  Group: Members Posts: 81 Joined: 30-June 15 From: Houston, TX Member No.: 18,905 Region Association: Southwest Region  |
My '74 2.0 is running rough and I'm trying to rule out as many causes as I can. The car was running fine, but started idling low and acting like it was running on three cylinders a few minutes after being started. Now it acts this way right at startup. In trying to rule out the fuel system (I'm also looking into the ignition and injection, but that's a different thread), the following has been done:
Confirmed the fuel pressure is good at 29.5 psi The injectors were just tested and cleaned All new SS and rubber fuel lines (no kinks, no leaks) Cleaned fuel tank, brand new sock. If I stick a stethoscope on each injector while the engine's (barely) idling I can hear them all click at a regular rate. All click at the same volume without any dead spots in the sound. Can I rule out my trigger contacts because of this? I would imagine if the trigger contacts were a problem, I wouldn't hear certain injectors click at all, or perhaps there might be erratic clicking. Anybody know if that's the case? |
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| Mueller |
Jun 24 2016, 08:19 PM
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#2
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914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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The injectors fire in pairs, so each trigger event 2 of them should be going off, never on the same side however, diagonal to each other.
The are a solenoid and will make a clicking sound when operating so that is normal. |
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| JPA914 |
Jun 24 2016, 09:09 PM
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#3
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Member Group: Members Posts: 81 Joined: 30-June 15 From: Houston, TX Member No.: 18,905 Region Association: Southwest Region |
QUOTE(Mueller @ Jun 24 2016, 09:19 PM)  The injectors fire in pairs, so each trigger event 2 of them should be going off, never on the same side however, diagonal to each other. The are a solenoid and will make a clicking sound when operating so that is normal. Ok, so the fact that I can hear (with a stethoscope) the solenoid clicking at idle at a regular, constant rate in all the injectors (all sound identical) indicates that the trigger contacts are functioning normally? |
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Posts in this topic
JPA914 Injectors clicking Jun 23 2016, 07:37 PM
JPA914 Nobody knows? Jun 24 2016, 12:12 PM G e o r g e you list what has been done, is this since the pro... Jun 24 2016, 12:49 PM
mgp4591
you list what has been done, is this since the pr... Jun 24 2016, 01:11 PM Mueller How is your battery voltage?
You can also see if ... Jun 24 2016, 12:59 PM JPA914 The car sat for years and I did everything I liste... Jun 24 2016, 07:05 PM 914_teener
The car sat for years and I did everything I list... Jun 24 2016, 07:48 PM 914_teener So....pull an injector at test each output.
Forge... Jun 24 2016, 07:49 PM Mueller
The injectors fire in pairs, so each trigger eve... Jun 24 2016, 09:12 PM JPA914
[quote name='JPA914' post='2363684' date='Jun 24 ... Jun 25 2016, 12:27 AM Mueller To confirm you can use a noid light...pro version ... Jun 24 2016, 09:14 PM |
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