|
|

|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| malcolm2 |
Jun 28 2013, 10:45 PM
Post
#1
|
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,749 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
Post
#2
|
|
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
Post
#3
|
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,749 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 |
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 Yah, don't tear into your fresh harness. Do y... Jun 29 2013, 04:46 PM
malcolm2
Yah, don't tear into your fresh harness. Do ... Jun 29 2013, 06:04 PM
malcolm2
Yah, don't tear into your fresh harness. Do... Jun 29 2013, 06:27 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 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![]() ![]() |
|
Lo-Fi Version | Time is now: 2nd December 2025 - 12:55 AM |
| All rights reserved 914World.com © since 2002 |
|
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |