 fuel injection issue, trigger points? |
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| luskesq |
 Oct 24 2010, 06:40 PM
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#1
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Member  Group: Members Posts: 276 Joined: 24-October 10 From: Fresno, CA Member No.: 12,303 Region Association: Central California  |
Have a '70 1.7 that I picked up that hasn't been run in years. Gone through ignition, points, plugs, timing and it runs . . . badly. Discovered when running that I can pull the ignition wires to 1 & 2 and it runs the same. No injector clicking with key on and opening the throttle switch on 1 or 2. 3 & 4 click. Could the problem be the trigger points and do all stock 1070 1.7's have trigger points?
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| brp986s |
Oct 24 2010, 07:39 PM
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#2
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Member Group: Members Posts: 434 Joined: 27-September 07 From: los angeles Member No.: 8,167 |
All stock 1.7 have the trigger points in the distributor. The way to test them is have someone turn over the engine while you measure continuity between the center and either of the the outer pins of the distributor. The circuit should open and close once per rev of the distributor rotor. One side of the trigger will fire injectors 1 & 4, the other 2 & 3. As the triggers wear, the slider blocks wear out - the circuit fails to open, and the ecu doesn't receive the signal to fire the injectors.The function of the trigger points is unrelated to the tps. good luck.
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| luskesq |
Oct 24 2010, 08:53 PM
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#3
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Member Group: Members Posts: 276 Joined: 24-October 10 From: Fresno, CA Member No.: 12,303 Region Association: Central California |
QUOTE(brp986s @ Oct 24 2010, 06:39 PM)  All stock 1.7 have the trigger points in the distributor. The way to test them is have someone turn over the engine while you measure continuity between the center and either of the the outer pins of the distributor. The circuit should open and close once per rev of the distributor rotor. One side of the trigger will fire injectors 1 & 4, the other 2 & 3. As the triggers wear, the slider blocks wear out - the circuit fails to open, and the ecu doesn't receive the signal to fire the injectors.The function of the trigger points is unrelated to the tps. good luck. Thank you all for the input. The ground connections are in place but I'll double check the quality of the connections. STUPID QUESTION??? Are the trigger points under the regular points, meaning I pull the reg. points & plate and the trigger is underneath and inside the distributor? I wasn't certain if I even had trigger points (this is only my 3rd 914 but the last one I had was over 30 years ago. Thanks again all. |
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Posts in this topic
luskesq fuel injection issue Oct 24 2010, 06:40 PM
swl I think that 1&2 failing is indeed half of the... Oct 24 2010, 07:39 PM
Cap'n Krusty
I think that 1&2 failing is indeed half of th... Oct 24 2010, 08:29 PM luskesq
All stock 1.7 have the trigger points in the dist... Oct 24 2010, 09:25 PM ejm Sounds more like a problem with the injector groun... Oct 24 2010, 07:45 PM Jeff Bowlsby :agree: Oct 24 2010, 08:20 PM brp986s 2 phillips screws mount the triggers into the side... Oct 24 2010, 09:08 PM ejm You need to pull the distributor to remove the tri... Oct 25 2010, 04:32 AM luskesq Thank you for confirming what I suspected. I inte... Oct 25 2010, 10:17 AM Tom An easy test is to hook up a meter to the injector... Oct 26 2010, 10:04 AM realred914
An easy test is to hook up a meter to the injecto... Oct 26 2010, 11:00 AM rick 918-S I made a simple test light from a couple small wir... Oct 26 2010, 10:58 AM |
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