 Fuel injection issues....car down going on three months...help!, I have tested, broken, repaired many things but still nuthin'... |
|
|
|
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. |
|
|
| second wind |
 May 28 2022, 02:02 PM
Post
#1
|
|
Senior Member  Group: Members Posts: 862 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California 
 |
Hello teener world....my fuel pump was having intermittent on/off issues and after messing up a few wires and swapping a few relays it seems to be consistently working now...new Optima battery didn't hurt things...still doesn't run and after a good three hour attack yesterday with seasoned 914'er figured out there is no gas coming out of the injectors.....plenty of pressure in the fuel rails but no spray out of the injectors. Got a pop or two after jiggling a few ground wires but all the ground wires seem to be nailed down down. The consensus is that it is either the wiring harness is messed up or the ECU may be bad. The wires have cracks in the plastic covering of course and everyone says that the ECU going bad is very rare....but possible. I would really appreciate your opinion on the subject and my car is a 1973 2.0 in case someone has a spare ECU on hand. Thank you very much and I need to get back on the road bad....I am only as happy as my car is running...I'm funny that way.
All the best, Greg |
   |
 
|
  |
Replies
| second wind |
May 28 2022, 05:29 PM
Post
#2
|
|
Senior Member Group: Members Posts: 862 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California
|
I did forget to mention prior to my current issue that when starting first thing in the morning the fuel pump will run for way more than two seconds....in fact I begin to start the car while the fuel pump is still going and the car will start just fine....then once warm when I turn the key to start the fuel pump with shut off in 2-3 seconds like it is supposed to and then I turn key to start and it starts just fine. I will keep thinking of additional clues. The wiring harness may have cracked insulation but the wire inside is still in there and functioning....correct? And a short will burn up something or blow a fuse....correct? The old harness can still function...right? I am all ears on any other thoughts....thank you again.
Greg |
|
|
|
| JeffBowlsby |
May 28 2022, 08:45 PM
Post
#3
|
|
914 Wiring Harnesses & Beekeeper Group: Members Posts: 8,907 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
|
QUOTE(second wind @ May 28 2022, 04:29 PM)  I did forget to mention prior to my current issue that when starting first thing in the morning the fuel pump will run for way more than two seconds....in fact I begin to start the car while the fuel pump is still going and the car will start just fine....then once warm when I turn the key to start the fuel pump with shut off in 2-3 seconds like it is supposed to and then I turn key to start and it starts just fine. I will keep thinking of additional clues. The wiring harness may have cracked insulation but the wire inside is still in there and functioning....correct? And a short will burn up something or blow a fuse....correct? The old harness can still function...right? I am all ears on any other thoughts....thank you again. Greg You are making a number of significant assumptions, any one of which could be critical and cause the symptoms and faulty behaviors you are noting. It is clear that your harness is toast. In addition you may be having issues with other FI components. Each ones function can and should be fully verified. |
|
|
|
Posts in this topic
second wind Fuel injection issues....car down going on three months...help! May 28 2022, 02:02 PM
Geezer914 If you are jiggling wires and getting a hit now an... May 28 2022, 02:29 PM mgphoto Rarely is not never, fuel pump never shuts off, bi... May 28 2022, 03:38 PM rjames nothing in your description points to the ECU yet.... May 28 2022, 05:08 PM mgphoto Here is another little clue, a noid light hooked u... May 28 2022, 05:23 PM
mgphoto
I did forget to mention prior to my current issue... May 28 2022, 05:32 PM Lockwodo Make sure the trigger points are functional and pl... May 28 2022, 06:52 PM jim_hoyland New harness; when I replaced mine, we found a brok... May 28 2022, 09:11 PM second wind Thank you all...will continue tomorrow....how much... May 28 2022, 09:56 PM
JeffBowlsby
Thank you all...will continue tomorrow....how muc... May 29 2022, 06:50 AM emerygt350 How do you feel about your trigger points? That w... May 29 2022, 03:50 AM Lockwodo
How do you feel about your trigger points? That ... May 29 2022, 05:22 AM Tjmrfe
Hello teener world....my fuel pump was having int... May 29 2022, 07:10 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 03:05 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.