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 )

> Starter, No click at starter with ignition or remote start
rgare
post Mar 22 2024, 01:20 PM
Post #1


Newbie
*

Group: Members
Posts: 13
Joined: 7-January 17
From: Lancaster CA
Member No.: 20,734
Region Association: None



No click

- Resistance between negative battery to starter case: 0.3
- Voltage at the the battery: 12.73
- Voltage at the starter: 12.73
- Voltage at the ignition spade while cranking: 12.53

If I connect a remote between the battery lead on the starter and the ignition spade on the starter and a multimeter to the battery lead, voltage drops from 12.7 to 2, when I press the remote. The starter doesn't click or engage. (I don't know what to think of that)

I just got the starter back from a local rebuilder with a good reputation. Before I take it back and have him check it, does anyone have any ideas?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
Superhawk996
post Mar 22 2024, 02:40 PM
Post #2


914 Guru
*****

Group: Members
Posts: 6,502
Joined: 25-August 18
From: Woods of N. Idaho
Member No.: 22,428
Region Association: Galt's Gulch



Resistance between chassis and starter case is way too high at .3 ohms. Needs to be zero.

Starter solenoid wants to draw 25A. The voltage drop across .3 ohms at 25A draw is 7.5v (lost). Given you are measuring 2v with solenoid trying to pull current, I’d say it’s all pretty close and that you are losing more than 7.5v in the ground strap vs theoretical.

Start by cleaning the ground stud (under trunk) and replacing your ground strap between chassis and transmission (most common problem). It is also possible the resistance is in the negative cable between the battery and the chassis. Or a little of each. I’ve seen plenty of cars with both problems.

You can test more directly by putting negative from battery right to starter case and positive from battery right to the solenoid + with jumper cables if you want to test it more directly.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rgare
post Mar 22 2024, 04:12 PM
Post #3


Newbie
*

Group: Members
Posts: 13
Joined: 7-January 17
From: Lancaster CA
Member No.: 20,734
Region Association: None



QUOTE(Superhawk996 @ Mar 22 2024, 12:40 PM) *

Resistance between chassis and starter case is way too high at .3 ohms. Needs to be zero.

Starter solenoid wants to draw 25A. The voltage drop across .3 ohms at 25A draw is 7.5v (lost). Given you are measuring 2v with solenoid trying to pull current, I’d say it’s all pretty close and that you are losing more than 7.5v in the ground strap vs theoretical.

Start by cleaning the ground stud (under trunk) and replacing your ground strap between chassis and transmission (most common problem). It is also possible the resistance is in the negative cable between the battery and the chassis. Or a little of each. I’ve seen plenty of cars with both problems.

You can test more directly by putting negative from battery right to starter case and positive from battery right to the solenoid + with jumper cables if you want to test it more directly.



Good info thank you
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 31st October 2024 - 07:32 PM