 75 1.8 garage find won't start |
|
|
|
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. |
|
|
| jhelgesen |
 Dec 12 2009, 08:42 PM
Post
#1
|
|
Newbie  Group: Members Posts: 42 Joined: 14-July 08 From: Charlotte Member No.: 9,299 Region Association: None  |
(IMG:http://i184.photobucket.com/albums/x311/jhelgesen/75%20914/DSCN5132.jpg)
I'm trying to resurrect a 75 1.8 thats been sitting for 15 years. (she was hiding in a basement next to the furnace for all that time). Pretty darn rust free as far as 914's go. She got parked for FI issues. (IMG:http://i184.photobucket.com/albums/x311/jhelgesen/75%20914/DSCN5141.jpg) I'm trying to get her running again. I've got the tank clean. The fuel pump was cleaned and runs. The fuel injectors have been cleaned and checked, click well. Dual relay clicks when attempting to start. She turns over, but I'm not getting power to the fuel injectors. What to I try next? Thanks, |
   |
 
|
  |
Replies
| davesprinkle |
Dec 13 2009, 10:50 AM
Post
#2
|
|
Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None 
|
Another thing to consider -- the Ljet brain requires a signal from the switched side of the coil. If this wire is disconnected, the injectors won't fire.
|
|
|
|
| jhelgesen |
Dec 13 2009, 11:16 AM
Post
#3
|
|
Newbie Group: Members Posts: 42 Joined: 14-July 08 From: Charlotte Member No.: 9,299 Region Association: None |
I have continuity to the resisters and they show about 5.9 ohms on the bench to each one. Wires look good. Voltage to ground showed .2 volts when turned on. Didn't move when trying to start.
Checked the contacts of the relay by a little careful surgery. Nothing melted or missing. Both coils move. Continuity looked good. Tried to trace their paths best I could. I'll see if I can get a new relay on order, will take a few days. Everything looks to be hooked up. Fuel pump runs when attempting to start, got voltage at the pump and can hear it running. No fire when I sprayed starting fluid in the system and tried to crank. (IMG:style_emoticons/default/welder.gif) Hi Mike!!! Happy to be here. |
|
|
|
Posts in this topic
jhelgesen 75 1.8 garage find won't start Dec 12 2009, 08:42 PM
Mark Henry Your story is very much like my '74, with mine... Dec 13 2009, 04:50 AM type47 There is a tool called a "noid" that wil... Dec 13 2009, 06:56 AM
7275914911
There is a tool called a "noid" that wi... Dec 13 2009, 07:15 AM jim912928 another key to the L-jet fuel injection is the Mas... Dec 13 2009, 09:12 AM ClayPerrine
another key to the L-jet fuel injection is the Ma... Dec 13 2009, 10:21 AM stepuptotheMike :wavebye: Dec 13 2009, 10:46 AM jim912928 Clay...info I got was from a Porsche mechanic who ... Dec 13 2009, 12:24 PM jhelgesen Next step I'll check the coil and plugs.
When... Dec 13 2009, 12:52 PM type47 It should be easy enough to put an inductive timin... Dec 13 2009, 01:14 PM messix point gap/dwell? Dec 13 2009, 01:24 PM davesprinkle
point gap/dwell?
I agree. Sounds to me like yo... Dec 13 2009, 03:18 PM jd74914 I too am thinking you don't have a functioning... Dec 13 2009, 03:24 PM jhelgesen Timing light shows no spark....lets see what I can... Dec 13 2009, 03:32 PM jhelgesen Can't get power to the ignition. Jumpered a w... Dec 13 2009, 05:16 PM jhelgesen Put in new points tonight. I now have power at th... Dec 14 2009, 08:32 PM r_towle Back up. Pardon me if I am brief...
We need to ext... Dec 14 2009, 08:44 PM jhelgesen Good plan Rich, thanks, I'll start again. Dec 14 2009, 09:02 PM ahdoman Also check the 2 fuses on the relay panel. I belie... Dec 14 2009, 09:10 PM ClayPerrine
Clay...info I got was from a Porsche mechanic who... Dec 14 2009, 09:43 PM computers4kids
Clay...info I got was from a Porsche mechanic wh... Dec 14 2009, 10:26 PM ClayPerrine
[quote name='ClayPerrine' post='1250674' date='De... Dec 15 2009, 07:30 AM jhelgesen Does someone have this picture for a 75 1.8 car? ... Dec 15 2009, 06:38 AM type47 The factory workshop manual shows 3 relay boards, ... Dec 15 2009, 07:19 AM computers4kids My 74 Ljet has only has two relays and one does ru... Dec 15 2009, 08:42 AM ClayPerrine
My 74 Ljet has only has two relays and one does r... Dec 15 2009, 08:52 AM zonedoubt :agree:
To understand how the double relay works,... Dec 15 2009, 10:27 AM davesprinkle
You shouldn't need the fuse either. All of t... Dec 15 2009, 11:15 AM ClayPerrine
You shouldn't need the fuse either. All of ... Dec 15 2009, 02:42 PM Dave_Darling
My 74 Ljet has only has two relays and one does r... Dec 16 2009, 11:15 PM jhelgesen Super!
Thanks, Dec 15 2009, 10:51 AM jhelgesen Didn't make it past step one. No pump running... Dec 15 2009, 07:37 PM ClayPerrine
Didn't make it past step one. No pump runnin... Dec 15 2009, 09:54 PM r_towle you stated that the fuel pump runs when you run it... Dec 15 2009, 08:15 PM jhelgesen Tested power at the pump this morning. I got powe... Dec 16 2009, 06:39 AM jhelgesen Still trying to start the motor without success.
... Dec 18 2009, 07:23 AM 7275914911
Still trying to start the motor without success.
... Dec 18 2009, 01:06 PM jhelgesen This morning, I broke down and sucked the smidgen ... Dec 19 2009, 11:06 AM ClayPerrine
This morning, I broke down and sucked the smidgen... Dec 19 2009, 04:45 PM jhelgesen Okay, I'm getting close. One the phone last n... Dec 20 2009, 10:46 AM jhelgesen Ah the web is a wonderful thing....
http://i184.p... Dec 20 2009, 10:56 AM RRietman John; With ign on, you should have 12v to the inje... Dec 20 2009, 11:36 AM jhelgesen :Qarl: :cheer: :headbanger:
Picked up a handfu... Dec 20 2009, 04:13 PM wrightee
Here is the offending resistor.
and my temporar... Dec 20 2009, 05:03 PM stepuptotheMike Sweetness John! Good to hear you got it runni... Dec 20 2009, 04:54 PM jhelgesen The resistor is in the fuel pump relay, circuit fr... Dec 20 2009, 05:14 PM type47 Wow... fixing a resistor in a relay, :worship: Dec 20 2009, 06:27 PM ClayPerrine You need to buy a replacement double relay, if onl... Dec 20 2009, 09:10 PM davesprinkle Good job tracking down and fixing that problem. E... Dec 20 2009, 10:03 PM computers4kids and, believe it or not, the seal under the oil fil... Dec 20 2009, 10:55 PM ClayPerrine
So your problem was the same as mine, a bad relay... Dec 21 2009, 07:47 AM computers4kids
So your problem was the same as mine, a bad rela... Dec 21 2009, 09:19 AM jhelgesen I have a new relay on order, along with a handfull... Dec 21 2009, 03:20 AM jhelgesen This afternoon, we opened the garage door, started... Dec 24 2009, 07:20 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 12:08 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.