 Starter relay or no starter relay, Been reading up for an hour and still don't know!! |
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| David Stowers |
 Feb 22 2014, 05:06 AM
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Member  Group: Members Posts: 99 Joined: 28-June 12 From: UK Member No.: 14,613 Region Association: None  |
On two occasions recently on pulling onto my driveway after a long journey my car won't restart after turning off to unlock the garage door. Luckily I can then just push the car in but with a European tour booked in the summer I'd like to sort the problem.
When I get back in after opening the garage the lights on the dash dim when I turn the key to start but there is no click. 20 minutes later it will start right up. Is this the problem that will be solved by a hot start relay kit or just a good old fashioned sticky solenoid? I'd rather do just the relay or just replace the solenoid so which is it? Thanks guys |
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| stugray |
Feb 24 2014, 08:21 AM
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#2
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
QUOTE Technically speaking, electrical current travels on the surface of a wire, not so much through a wire. . That is not really true. AC current moves across the surface of a conductor. DC current moves through the entire bulk of the conductor. (Google "skin effect") QUOTE See the black mark? That is what happens to the contacts in your ignition switch every time you start your car! And another thing that makes the arcs worse is the reverse EMF voltage spike from the magnetic field in the solenoid collapsing when you open the switch. That makes the arcs even bigger. Certain relays have a "reverse EMF diode" in them to dissipate this spark. They are also called "snubber diodes". They reduce the effect of the reverse spike. (IMG:http://www.914world.com/bbs2/uploads_offsite/www.bcae1.com-10819-1393251715.1.jpg) Good site about relays: relays |
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Posts in this topic
David Stowers Starter relay or no starter relay Feb 22 2014, 05:06 AM
Mblizzard Sometimes it is hard for me to get my head around ... Feb 22 2014, 05:48 AM SLITS Put the relay in and forget it.
Current Bosch reb... Feb 22 2014, 08:22 AM Luke M Here's a quick wiring guide.
You should be abl... Feb 22 2014, 08:27 AM r_towle Might try cleaning your tranny ground strap.
I end... Feb 22 2014, 08:35 AM Mike Bellis Bottom line... The relay is a high current switchi... Feb 22 2014, 08:40 AM 76-914 Relay, relay, relay. Clean everything till your he... Feb 22 2014, 09:10 AM SLITS One other thing is that the current crop of switch... Feb 22 2014, 09:23 AM bandjoey The first year I drove my 914 I had the problem. ... Feb 22 2014, 01:02 PM bandjoey In the drawing above....The big fat wire from the ... Feb 22 2014, 01:07 PM
Luke M
In the drawing above....The big fat wire from the... Feb 22 2014, 01:49 PM David Stowers
In the drawing above....The big fat wire from th... Feb 22 2014, 02:11 PM type47 Any suggestions for novel/unique/cool ways to moun... Feb 22 2014, 03:52 PM SLITS
Any suggestions for novel/unique/cool ways to mou... Feb 22 2014, 05:25 PM ClayPerrine I tried all the different hot start fixes over the... Feb 23 2014, 10:00 AM toolguy Technically speaking, electrical current travels o... Feb 23 2014, 11:17 AM David Stowers
Technically speaking, electrical current travels ... Feb 23 2014, 03:28 PM r_towle
Technically speaking, electrical current travels ... Feb 23 2014, 08:54 PM toolguy In your first post, you said the lights go dim whe... Feb 23 2014, 03:43 PM David Stowers
You can take the solenoid apart and clean up the ... Feb 23 2014, 04:35 PM Spoke
the dash dim when I turn the key to start but the... Feb 23 2014, 08:44 PM Tom A relay is not necessary, however, if one is not ... Feb 24 2014, 02:59 AM Mark Henry Installing ford relays since the eighties. I'v... Feb 24 2014, 05:53 AM Tom The inductive spike is what makes the arc and carb... Feb 24 2014, 01:13 PM timothy_nd28 Solid state relays is the way to go. :popcorn: Feb 24 2014, 01:21 PM stugray Tom,
That is a pretty good explanation. The techn... Feb 24 2014, 02:28 PM Tom stugray,
You are correct, I was trying not to g... Feb 24 2014, 06:22 PM ClayPerrine I believe it and understand it. That's the sa... Feb 25 2014, 06:59 AM Mark Henry
I believe it and understand it. That's the s... Feb 25 2014, 07:53 AM Tom Clay,
A capacitor would not do the trick for th... Feb 25 2014, 07:58 AM ClayPerrine
Clay,
A capacitor would not do the trick for t... Feb 25 2014, 10:28 AM r_towle
Clay,
A capacitor would not do the trick for ... Feb 25 2014, 07:00 PM McMark Very interesting! Thanks for posting. :notwo... Feb 25 2014, 10:22 AM David Stowers Wow! This is what I love and hate about this s... Feb 25 2014, 04:03 PM Mark Henry What :huh:
Your not going to solder in the capa... Feb 25 2014, 05:58 PM Tom Well, I looked thru my limited left over parts and... Feb 25 2014, 06:27 PM bandjoey With full light effects and adjustable power setti... Feb 25 2014, 07:01 PM Mark Henry
With full light effects and adjustable power sett... Feb 25 2014, 07:11 PM SLITS Nanu Nanu .................. Feb 25 2014, 08:24 PM stugray You have to admit... installing the "helper... Feb 25 2014, 10:23 PM Mark Henry
You have to admit... installing the "helper... Feb 26 2014, 07:06 AM Tom Actually the normal state of the relay is open, an... Feb 26 2014, 09:03 AM eyesright VW/Porsche built up a lot of good karma by bringin... Feb 26 2014, 09:58 AM |
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