 75 LJet will not fire, finishing restoration |
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| malcolm2 |
 Jun 28 2013, 10:45 PM
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#1
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Advanced Member  Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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Ok I think I am good on the seat belt relay. YLW and YLW/red are spliced. And I have checked for continuity all the way from the starter to the key on that wire.
I have spark, points checked too. I have fuel pressure, about 40 psi, checked between p-side fuel rail and cold start valve. Starter works fine oil pressure builds, light goes out on the dash Engine timing is still at rebuild setting...0 TDC. Re-built FI & Ignition & Alt harnesses I did have trouble with the key switch, so the steering wheel is out, levers are not connected and I turn a screw driver on the end of the key connector to fire the starter, should not be an issue, correct? I got the L-jet trouble shooting "no start" pages to try tomorrow. Any other ideas? I am baffled. (IMG:style_emoticons/default/confused24.gif) |
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| timothy_nd28 |
Jun 29 2013, 04:46 PM
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#2
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest
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Yah, don't tear into your fresh harness. Do you have the 3 wires coming from the harness to the engine tin ground connection? If so, consider running a temp jumper from that to the negative battery terminal, then recheck to see if your voltages came back on the ECU connector
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| malcolm2 |
Jun 29 2013, 06:04 PM
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#3
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(timothy_nd28 @ Jun 29 2013, 05:46 PM)  Yah, don't tear into your fresh harness. Do you have the 3 wires coming from the harness to the engine tin ground connection? If so, consider running a temp jumper from that to the negative battery terminal, then recheck to see if your voltages came back on the ECU connector Yes the ground wires are present and connected to the top of the engine. I'll try some jumping. Clark |
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| malcolm2 |
Jun 29 2013, 06:27 PM
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#4
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(malcolm2 @ Jun 29 2013, 07:04 PM) QUOTE(timothy_nd28 @ Jun 29 2013, 05:46 PM) Yah, don't tear into your fresh harness. Do you have the 3 wires coming from the harness to the engine tin ground connection? If so, consider running a temp jumper from that to the negative battery terminal, then recheck to see if your voltages came back on the ECU connector Yes the ground wires are present and connected to the top of the engine. I'll try some jumping. Clark TAKE THAT BACK. One had popped off. The new female connector on the FI harness was a bit too wide to stay on the blade. I closed the gap and installed. Then checked the voltages again and now I have 12 volts between 10 and 5, 10 and 16 and 10 and 17. The car still did not start. |
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Posts in this topic
malcolm2 75 LJet will not fire Jun 28 2013, 10:45 PM
timothy_nd28 Can you post a few pics, so we can rule out anythi... Jun 28 2013, 11:58 PM
malcolm2
Can you post a few pics, so we can rule out anyth... Jun 29 2013, 07:05 AM jim_hoyland My favorite no-start issues have been:
1. Yellow w... Jun 29 2013, 07:21 AM Rockaria
My favorite no-start issues have been:
...
3. The... Jun 29 2013, 09:53 AM timothy_nd28 Okay, so the car turns over and you already verifi... Jun 29 2013, 09:33 AM malcolm2
Okay, so the car turns over and you already verif... Jun 29 2013, 02:04 PM jim_hoyland Another thing I would ask: Does the engine start f... Jun 29 2013, 10:13 AM malcolm2 Morning tests lead me to the Injectors. I pulled ... Jun 29 2013, 11:59 AM timothy_nd28 Did you have 12vdc on pin 10 on the ECU connector? Jun 29 2013, 12:01 PM timothy_nd28 If you don't have 12v at pin 10 you won't ... Jun 29 2013, 12:10 PM malcolm2
BTW, You won't have much luck reading voltag... Jun 29 2013, 02:10 PM malcolm2
If you don't have 12v at pin 10 you won't... Jun 29 2013, 02:16 PM timothy_nd28
If you don't have 12v at pin 10 you won... Jun 29 2013, 02:19 PM jim_hoyland I assume the resister pack is plugged in; you may ... Jun 29 2013, 01:26 PM Sleepin Every time mine hasn't started (each time in t... Jun 29 2013, 01:37 PM timothy_nd28 Good, now with the ECU connector off, measure pins... Jun 29 2013, 02:16 PM malcolm2
Good, now with the ECU connector off, measure pin... Jun 29 2013, 02:20 PM timothy_nd28 I'm not home, give me a hour to reply Jun 29 2013, 02:52 PM malcolm2
I'm not home, give me a hour to reply
ANY ... Jun 29 2013, 02:55 PM timothy_nd28 Okay, with one meter lead on pin 10 (ECU connector... Jun 29 2013, 03:36 PM malcolm2
Okay, with one meter lead on pin 10 (ECU connecto... Jun 29 2013, 04:21 PM timothy_nd28 Pin 5, 16 and 17 should all be grounds. This coul... Jun 29 2013, 04:26 PM malcolm2
Pin 5, 16 and 17 should all be grounds. This cou... Jun 29 2013, 04:32 PM timothy_nd28 You should of had 12 volts from pin 10 to 5,,pin 1... Jun 29 2013, 04:36 PM malcolm2
You should of had 12 volts from pin 10 to 5, pin ... Jun 29 2013, 04:43 PM timothy_nd28
Is it possible to remove the black plastic ECU ... Jun 29 2013, 05:35 PM timothy_nd28 Good, but we are running out of things to check. ... Jun 29 2013, 06:35 PM malcolm2
Good, but we are running out of things to check. ... Jun 29 2013, 06:55 PM pilothyer
I have heard about starting cars with starting f... Jun 30 2013, 08:44 AM Black22
I have heard about starting cars with starting ... Jun 30 2013, 10:06 AM malcolm2
[quote name='pilothyer' post='1887430' date='Jun ... Jun 30 2013, 11:02 AM timothy_nd28 The car will run off ether, pull off the AFM and s... Jun 29 2013, 07:12 PM malcolm2
The car will run off ether, pull off the AFM and ... Jun 29 2013, 07:31 PM timothy_nd28 I have little faith with parts laying in some box.... Jun 29 2013, 07:50 PM malcolm2
I have little faith with parts laying in some box... Jun 29 2013, 09:11 PM timothy_nd28 How fancy is your meter, does it check dc amps? Y... Jun 29 2013, 09:15 PM malcolm2
How fancy is your meter, does it check dc amps? ... Jun 29 2013, 09:21 PM timothy_nd28 Yah, you should hear a slight click, but I think t... Jun 29 2013, 09:27 PM malcolm2
Yah, you should hear a slight click, but I think ... Jun 29 2013, 09:38 PM timothy_nd28 Pull the injectors and send them to Witch Hunters.... Jun 29 2013, 10:11 PM malcolm2
Pull the injectors and send them to Witch Hunters... Jun 30 2013, 07:56 AM Jeff Bowlsby Hey Clark, Tim, I have only loosely followed this... Jun 29 2013, 11:10 PM timothy_nd28 Never mind the amp meter. I'm fairly certain ... Jun 30 2013, 09:46 AM malcolm2 Soaking the injectors and using a 9v battery did n... Jul 1 2013, 12:00 PM jim_hoyland Is there a method for storing injectors that are g... Jul 1 2013, 01:03 PM malcolm2
Is there a method for storing injectors that are ... Jul 1 2013, 02:55 PM timothy_nd28
Is there a method for storing injectors that are... Jul 1 2013, 03:01 PM Jeff Bowlsby
I was secretly hoping failure and you would give ... Jul 1 2013, 07:01 PM timothy_nd28
I was secretly hoping failure and you would give... Jul 1 2013, 10:27 PM r_towle I have had very good success using Tektron FI clea... Jul 1 2013, 03:02 PM Black22 I run straight Marvel Mystery Oil through them bef... Jul 1 2013, 06:28 PM malcolm2 Small celebration tonight. A forum friend here in... Jul 2 2013, 08:54 PM timothy_nd28 :Qarl: Jul 2 2013, 08:57 PM Jeff Bowlsby Oh yea... ;) Jul 2 2013, 09:42 PM |
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