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
> ground strap, could this be why it's not starting?
vmills
post Jun 7 2005, 10:55 PM
Post #1


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
I was wondering if there's a ground strap on the transmission or engine. I get spark when I pull a plug wire and put a plug on and ground it, and I'm 95% there's fuel and compression, so I'm wondering if it's not sparking when I put the plug wire back on the plug that's in the engine.

Pictures, help, anything is appreciated

thanks
vic
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bleyseng
post Jun 7 2005, 10:58 PM
Post #2


Aircooled Baby!
**********

Group: Members
Posts: 13,034
Joined: 27-December 02
From: Seattle, Washington (for now)
Member No.: 24
Region Association: Pacific Northwest
The ground strap goes from the nose cone bolts to the bottom of the trunk. All contacts should be clean
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
vmills
post Jun 7 2005, 11:00 PM
Post #3


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
nose cone bolts? Where are those?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bruce Allert
post Jun 7 2005, 11:13 PM
Post #4


Hellions asleep
****

Group: Members
Posts: 3,289
Joined: 19-March 03
From: Eagle Creek, Orygun
Member No.: 441
Region Association: Pacific Northwest
Go under the car from the rear and look up on the drivers side of the tranny where it connects to the engine. There will be a braided copper strap bolted to the top/ side and runs to the bottom of the trunk.

This strap IS EVERYTHING!

good luck...........b
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
vmills
post Jun 7 2005, 11:14 PM
Post #5


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
Thanks, greatly appreciated.
I'll look at it tomorrow and see if that fixes everything.

It's been a mystery as to why this thing hasnt been working.

fingers crossed

thanks
vic
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Jun 7 2005, 11:14 PM
Post #6


Resident German
*************************

Group: Admin
Posts: 41,651
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE (vmills @ Jun 7 2005, 09:55 PM)
I was wondering if there's a ground strap on the transmission

yes sir, there is. and without it, you'll have all sorts of electrical gremlins ...

it is located at the top rear of the transmission and connects to a stud on the underside of the rear trunk.
make sure the strap is in good condition and both ends are clean and have good contact ...

(IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Andy


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JoeSharp
post Jun 7 2005, 11:15 PM
Post #7


In Irvine, Ca. May 15-18
****

Group: Members
Posts: 3,947
Joined: 9-July 03
From: DeLand, Florida
Member No.: 898
Region Association: South East States
The bolts that hold the part of the tranny that have the ears that mount the tranny to the body. Any one of the top bolts are a good location to put the ground strap. The body should have a stud welded to the bottom of the trunk floor to accept it.
:PERMAGRIN: Joe
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) Yep. what Andy said
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ThinAir
post Jun 7 2005, 11:28 PM
Post #8


Best friends
****

Group: Members
Posts: 2,542
Joined: 4-February 03
From: Flagstaff, AZ
Member No.: 231
Region Association: Southwest Region
Here is a picture of the ground strap. There is a lug welded to the bottom of the trunk where one end is attached. The nose cone bolts can be seen in the upper right picture here. They are the 3 bolts at the top of that photo. Even though it's a Wevo trans, it will give you an idea of what to look for.

You definitely need this. I forgot to attach mine after reinstalling my engine. It would barely turn over and I couldn't start it. After I attached the strap all was good!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Andyrew
post Jun 7 2005, 11:56 PM
Post #9


Spooling.... Please wait
**********

Group: Members
Posts: 13,376
Joined: 20-January 03
From: Riverbank, Ca
Member No.: 172
Region Association: Northern California
If for some reason you dont have a ground strap. I suggest running a ground wire from the starter bolt to the body, easiest is where the battery grounds. bout a 7ft cable... makes a big difference..
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ThinAir
post Jun 8 2005, 12:05 AM
Post #10


Best friends
****

Group: Members
Posts: 2,542
Joined: 4-February 03
From: Flagstaff, AZ
Member No.: 231
Region Association: Southwest Region
QUOTE (Andyrew @ Jun 7 2005, 10:56 PM)
If for some reason you dont have a ground strap. I suggest running a ground wire from the starter bolt to the body, easiest is where the battery grounds. bout a 7ft cable... makes a big difference..

I've seen this recommended as a way to cure charging system problems because you eliminate the body as the ground return. I did this on my son's 75 bus and have a cable for my 914, but haven't installed it yet.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rand
post Jun 8 2005, 01:12 AM
Post #11


Cross Member
*****

Group: Members
Posts: 7,409
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None
If it cranks strong, I wouldn't think the ground strap is the problem. Usually if a ground strap connection is bad enough to cause a problem with the car running, the symptom would be it doesn't crank (or cranks slow, or hesitates before cranking). But I digress. For certain, it's important to make sure the ground strap is clean and tight.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
xsboost90
post Jun 8 2005, 05:56 AM
Post #12


Senior Member
***

Group: Members
Posts: 1,393
Joined: 2-August 04
From: cincinnati
Member No.: 2,432
yeah mine wouldnt crank right, i ran a ground from the battery to the starter bolt and she cranked great! Try pulling a plug, putting it on the plug wire and set it on something it can ground itself on and crank it to see if its sparking.

edit- oh you did that. PUt a ground on it!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
vmills
post Jun 8 2005, 10:23 AM
Post #13


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
Hmmm...
Our engine cranks fine, and we used one of those light circuit testers on the engine (near the spark plug) to test for connectivity, and it worked which would mean that the block is grounded. Sooo I guess we'll keep checking other things.

Thanks for all the help, you guys are awesome.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
vmills
post Jun 8 2005, 10:35 AM
Post #14


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
I have another question quick which might help me fix my problem...

sort of one of those 'doh!' questions but: how do the plug wires go on the distributor? I know you just put them on, but how are they oriented? I've been looking around for photos or diagrams but I can't find ay that show it.

Thanks for any help.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bruce Allert
post Jun 8 2005, 11:12 AM
Post #15


Hellions asleep
****

Group: Members
Posts: 3,289
Joined: 19-March 03
From: Eagle Creek, Orygun
Member No.: 441
Region Association: Pacific Northwest
Are you asking in what sequence?

Looking at the dizzy from the rear of the car the #1 plug wire goes into the top left then its clock wise (to the right) with #4 then #3 then #2. 1-4-3-2 is the firing order.

.....b
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jun 8 2005, 11:15 AM
Post #16


914 Freak!
***************

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE (vmills @ Jun 8 2005, 09:35 AM)
I have another question quick which might help me fix my problem...

sort of one of those 'doh!' questions but: how do the plug wires go on the distributor? I know you just put them on, but how are they oriented? I've been looking around for photos or diagrams but I can't find ay that show it.

Thanks for any help.

your Haynes manual that you "should" have shows a picture (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

firing order is 1,4,3,2

normally, when the motor is on #1 TDC, the rotor should be facing the hole on top of the fan housing............
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
vmills
post Jun 8 2005, 11:48 AM
Post #17


Newbie
*

Group: Members
Posts: 39
Joined: 5-May 05
From: Andover, MA\Watertown, WI
Member No.: 4,033
I actually looked in haynes - couldn't find it, but i swore that I've seen it there - just couldn't find it.

Thanks for the help again though, once again you guys are great.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MarkG
post Jun 8 2005, 12:48 PM
Post #18


Member
**

Group: Members
Posts: 314
Joined: 24-May 04
From: Colorado Springs
Member No.: 2,102
A popular modification with the 'other Axis' car folks is a grounding kit such as this:

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...7978278740&rd=1

These kits tie every grounding point you want directly to the battery ground. I have one of these kits but so far I have only tied the 3 grounding FI wires under the hood to the battery ground
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: 21st May 2024 - 12:53 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 ...