Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Shutting off the engine, Engine won't shut off
erwindv
post Dec 6 2018, 03:48 AM
Post #1


Newbie
*

Group: Members
Posts: 46
Joined: 17-June 16
From: Belgium
Member No.: 20,119
Region Association: Europe
Arriving home with the car, turning the ignition key to shut off the engine but it keeps on running!!
What could be wrong?
Some electrical issue with the ignition switch?
Meanwhile, before fixing it, what is the safest way to turn it off?

Thx
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Tbrown4x4
post Dec 6 2018, 04:03 AM
Post #2


Senior Member
***

Group: Members
Posts: 699
Joined: 13-May 14
From: Port Orchard, WA
Member No.: 17,338
Region Association: None
Can you pull the fuel pump relay, or is it carbed?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Tdskip
post Dec 6 2018, 08:14 AM
Post #3


Advanced Member
****

Group: Members
Posts: 3,678
Joined: 1-December 17
From: soCal
Member No.: 21,666
Region Association: None
Keeps running for 15 second, 30, 60 seconds or will sit there and run until you get out of the cockpit and do something?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
erwindv
post Dec 6 2018, 08:33 AM
Post #4


Newbie
*

Group: Members
Posts: 46
Joined: 17-June 16
From: Belgium
Member No.: 20,119
Region Association: Europe
QUOTE(Tdskip @ Dec 6 2018, 03:14 PM) *

Keeps running for 15 second, 30, 60 seconds or will sit there and run until you get out of the cockpit and do something?


Won't stop at all
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bretth
post Dec 6 2018, 08:42 AM
Post #5


Senior Member
***

Group: Members
Posts: 899
Joined: 23-June 15
From: Central TX
Member No.: 18,882
Region Association: Southwest Region
I seem to remember something about using the wrong tail light bulb causing this problem? Unless I am confusing this with another issue, couldn't find any info on a quick search though. Something about using a single filament bulb instead of a double filament keeps the ignition circuit alive when the key is off.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Dec 6 2018, 08:47 AM
Post #6


Advanced Member
****

Group: Members
Posts: 4,693
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
I bet it's the ignition switch. Pull the hot wire off the coil to shut it down.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rhodyguy
post Dec 6 2018, 08:52 AM
Post #7


Chimp Sanctuary NW. Check it out.
***************

Group: Members
Posts: 22,054
Joined: 2-March 03
From: Orion's Bell. The BELL!
Member No.: 378
Region Association: Galt's Gulch
As asked, FI or carbs?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
erwindv
post Dec 6 2018, 08:58 AM
Post #8


Newbie
*

Group: Members
Posts: 46
Joined: 17-June 16
From: Belgium
Member No.: 20,119
Region Association: Europe
QUOTE(rhodyguy @ Dec 6 2018, 03:52 PM) *

As asked, FI or carbs?

It 's af FI
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JFG
post Dec 6 2018, 09:05 AM
Post #9


Senior Member
***

Group: Members
Posts: 686
Joined: 7-April 16
From: Wales
Member No.: 19,869
Region Association: None
emergency engine shut off, put in 5th and stall it then go pull wires off the coil.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Dec 7 2018, 04:54 PM
Post #10


914 Idiot
**********

Group: Members
Posts: 14,980
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
QUOTE(bretth @ Dec 6 2018, 06:42 AM) *

I seem to remember something about using the wrong tail light bulb causing this problem? Unless I am confusing this with another issue, couldn't find any info on a quick search though. Something about using a single filament bulb instead of a double filament keeps the ignition circuit alive when the key is off.


That was me.

If you have the wrong bulb in one of the taillight sockets, and you leave the turn signal switch up or down (depending on where the wrong bulb is) the power from the "parking light" feature will feed back through the ignition switch to the ignition and fuel injection systems...

Mixing up power and ground will make for very very weird symptoms!

Has any electrical work been done on the car since the time it wasn't having this problem? If so, that's the first place to look.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
dr914@autoatlanta.com
post Dec 7 2018, 04:57 PM
Post #11


914 Guru
*****

Group: Members
Posts: 7,806
Joined: 3-January 07
From: atlanta georgia
Member No.: 7,418
Region Association: None
pull the voltage regulator and see if it shuts off, if so the alternator is shorted, if not probably the ignition switch
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JamesM
post Dec 8 2018, 12:03 AM
Post #12


Senior Member
***

Group: Members
Posts: 1,888
Joined: 6-April 06
From: Kearns, UT
Member No.: 5,834
Region Association: Intermountain Region
what fuel system are you running?

What happens when you step on the brake after the key has been shutoff?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
euro911
post Dec 8 2018, 04:13 AM
Post #13


Retired & living the dream. God help me if I wake up!
*****

Group: Members
Posts: 8,845
Joined: 2-December 06
From: So.Cal. & No.AZ (USA)
Member No.: 7,300
Region Association: Southern California
QUOTE(Dave_Darling @ Dec 7 2018, 02:54 PM) *
QUOTE(bretth @ Dec 6 2018, 06:42 AM) *
I seem to remember something about using the wrong tail light bulb causing this problem? Unless I am confusing this with another issue, couldn't find any info on a quick search though. Something about using a single filament bulb instead of a double filament keeps the ignition circuit alive when the key is off.
That was me.

If you have the wrong bulb in one of the taillight sockets, and you leave the turn signal switch up or down (depending on where the wrong bulb is) the power from the "parking light" feature will feed back through the ignition switch to the ignition and fuel injection systems...

Mixing up power and ground will make for very very weird symptoms!

Has any electrical work been done on the car since the time it wasn't having this problem? If so, that's the first place to look.

--DD
It can happen on carb'd cars as well. Not sure about the 914s, but it has happened on an early 911. Ask me how I know (IMG:style_emoticons/default/dry.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 18th April 2024 - 04:33 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
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 ...