 Sudden Cut-out While Driving, ~faulty relay board was the culprit |
|
|
|
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. |
|
|
| poorsche914 |
  Apr 17 2014, 12:09 PM
Post
#1
|
|
T4 Supercharged  Group: Members Posts: 3,090 Joined: 28-May 09 From: Smoky Mountains Member No.: 10,419 Region Association: South East States  |
Driving to work this morning and my 2.0 D-jet suddenly cut out. Tach dropped to ZERO. It fired back up fairly quickly being still in gear and rolling. Did this twice.
Made it to work and when I went out to start it, would not fire. Can hear the fuel pump and have fuel. Ideas where to start looking appreciated. Some more info that may have impact: Optima red battery that has a bad cell or something... drains overnight to around 75%. Other than that, cranks strong. Thanks, steve (IMG:style_emoticons/default/driving.gif) |
   |
 
|
  |
Replies
| Tom |
Apr 18 2014, 02:26 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
I read your post again and that draining of the battery grabbed my attention. Are you sure the battery is going bad? With the key OFF, and disconnecting the negative battery connection, do you get any spark at all?
I mentioned removing the negative battery post because it is safer; if the wrench you are using comes into contact with the body when loosening the bolt, it won't cause a big arc like it would if you disconnect the positive battery connector first. Have you charged the battery fully with it out of the car and then let it set overnight to see how much it goes down? Measure the voltage 1/2 hour after completing the charge, then in the morning and see what the difference is. Your no start events sounds like a ground issue or bad connection somewhere between the battery positive and the starter solenoid. If you need help going thru that process, let me know and I can help you get thru it. Tom |
|
|
|
| poorsche914 |
Apr 18 2014, 02:59 PM
Post
#3
|
|
T4 Supercharged Group: Members Posts: 3,090 Joined: 28-May 09 From: Smoky Mountains Member No.: 10,419 Region Association: South East States |
Battery is a 2+ year old Optima that is going bad (IMG:style_emoticons/default/dry.gif) When disconnected, it drains to around 70-75% overnight.
Pretty sure the issue here is the relay board. I am in the process of stripping all the tar off one and repairing it where needed. After 40 years, loose connections are common on these boards. (IMG:style_emoticons/default/driving.gif) |
|
|
|
Posts in this topic
poorsche914 Sudden Cut-out While Driving Apr 17 2014, 12:09 PM
dlee6204 I'd get a spare spark plug see if any of my cy... Apr 17 2014, 12:26 PM
poorsche914 Swapped out relay boards... fires up but the fuel ... Apr 17 2014, 12:32 PM 76-914 Or a bad connection (in the 14 pin plug or engine ... Apr 17 2014, 05:06 PM poorsche914 Or a bad connection (in the 14 pin plug or engine ... Apr 17 2014, 06:16 PM Tom OK, I am sorry, but did you use any GM parts? :D... Apr 17 2014, 06:14 PM The Cabinetmaker Do a continuity check on the harness for the ecu. ... Apr 17 2014, 06:23 PM The Cabinetmaker Mr Anders has the instructions on his site Apr 17 2014, 06:25 PM poorsche914 Mr Anders has the instructions on his site
Thanks.... Apr 17 2014, 06:29 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th May 2024 - 01:02 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.