75 LJet will not fire, finishing restoration |
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75 LJet will not fire, finishing restoration |
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 |
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) |
timothy_nd28 |
Jun 29 2013, 07:12 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 |
The car will run off ether, pull off the AFM and squirt it directly in the rubber boot. You should also verify that the injectors are not firing, by pulling one and placing it into a glass jar. It is exceedingly rare, but the ECU could be at fault here.
You have spark, and fuel pressure. You also have power going to the ECU on pin 10, and all the grounds pins 5, 16,17 fixed. We checked the continuity of all injectors and resistor pack by verifying voltage on pins 14,15,32 and 33. The CHT is present and within spec as well as the continuity of pin 1 to the ignition coil. I'm speculating that you have a bad brain unit. But before you order a new one, pull a injector and make sure it's not spraying fuel. |
malcolm2 |
Jun 29 2013, 07:31 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 |
The car will run off ether, pull off the AFM and squirt it directly in the rubber boot. You should also verify that the injectors are not firing, by pulling one and placing it into a glass jar. It is exceedingly rare, but the ECU could be at fault here. You have spark, and fuel pressure. You also have power going to the ECU on pin 10, and all the grounds pins 5, 16,17 fixed. We checked the continuity of all injectors and resistor pack by verifying voltage on pins 14,15,32 and 33. The CHT is present and within spec as well as the continuity of pin 1 to the ignition coil. I'm speculating that you have a bad brain unit. But before you order a new one, pull a injector and make sure it's not spraying fuel. Done, pulled an injector and NO FUEL in the cup. I'll give the spray thing a try too. I bought a grab bag of FI stuff some time back. I needed 1 piece but the guy wanted to get rid of everything. So I have a 2nd Brain, no idea of the condition, but it is covered with TAR. I have put that in and still no start. I understand it is rare to have a bad ECU, but I figured it was even less probable to have 2 bad ones. Anyway, same result. Guess I'll start searching for one. You never made mention of the timing. I have not really set the timing to anything past build setting of 0TDC. I figured I could at least get something out of it. And with no fuel, I guess that is not an issue yet, thoughts? Thanks so much for all your suggestions. If you get a wild idea, let me know, I'm open. Clark |
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