Spider S4 (93) Braided Grounds - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 11 (permalink) Old 05-09-2015, 11:30 AM Thread Starter
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Spider S4 (93) Braided Grounds

Where is the 2nd (large) braided ground on an S4? I found and cleaned the small one running off the transmission. Can someone provide a pic too?

M
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post #2 of 11 (permalink) Old 05-09-2015, 11:39 AM
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I wonder if its the same as the S3.
Check this out.

http://www.alfabb.com/bb/forums/1076166-post4.html

Mike

'87 Quadrifoglio
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post #3 of 11 (permalink) Old 05-09-2015, 01:50 PM
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I dont have that ground strap on my intake plenum on my 91.

i can only think of that one from the transmission you have already found.

What makes you think there is a second braided ground strap?

Vin

1991 Spider Veloce - Red on Tan - Rosa Bionda
1987 Spider Quadrifoglio - Red on Grey - Rosa - Sold
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post #4 of 11 (permalink) Old 05-09-2015, 02:08 PM
But Mad North-Northwest
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Yeah, I don't recall seeing one to the plenum on my '91 either.

Tom

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post #5 of 11 (permalink) Old 05-09-2015, 02:17 PM
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Like Vin says, I too can't think of another braided ground on the S4.
Just thinking out loud why the S3 has one on the plenum...I can only think because the S3 has a cold start valve there and the S4 hasn't??

ECU main grounds, yes..........on the side of the head (inlet side), but they're not braided (nevertheless, important they certainly are!)....last photo in Vin's post here:
http://www.alfabb.com/bb/forums/5237633-post7.html

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.

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post #6 of 11 (permalink) Old 05-09-2015, 02:18 PM Thread Starter
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I read some posts where they reference 2 braided ground straps. I can't find any reference to them in the book. Maybe there is just one.

Thanks Guys!!

Just getting frustrated as "Sophia" should be on the road right now...especially with the weather we are getting.

Cleaned the braided ground connection....the only thing left to check/do is replace the starter. Ordered from Rock Auto on Thursday...should be here next Friday.

As per my other post, not sure I can do it myself or have a mechanic do it. If I can get it out from below, without taking the plenum and associated connections off, I will try it.

M
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post #7 of 11 (permalink) Old 05-09-2015, 02:26 PM Thread Starter
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Quote:
Originally Posted by spiderserie4 View Post
Like Vin says, I too can't think of another braided ground on the S4.
Just thinking out loud why the S3 has one on the plenum...I can only think because the S3 has a cold start valve there and the S4 hasn't??

ECU main grounds, yes..........on the side of the head (inlet side), but they're not braided (nevertheless, important they certainly are!)....last photo in Vin's post here:
http://www.alfabb.com/bb/forums/5237633-post7.html
I cleaned the top side ECU grounds.....but that wouldn't be the cause of the "sporadic no-start click...click" issue, would it? If possible, where are they grounded to?
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post #8 of 11 (permalink) Old 05-09-2015, 03:23 PM
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Quote:
Originally Posted by MarioPan View Post
I cleaned the top side ECU grounds.....but that wouldn't be the cause of the "sporadic no-start click...click" issue, would it? If possible, where are they grounded to?
I read from your other "no start" thread, that you installed the starter relay last year.

Speaking of grounds, I had some starting issue when I installed my relay to find out that the relay ground to the body was not good.

Its an easy thing to check.

Good luck,

Vin

1991 Spider Veloce - Red on Tan - Rosa Bionda
1987 Spider Quadrifoglio - Red on Grey - Rosa - Sold
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post #9 of 11 (permalink) Old 05-09-2015, 05:52 PM
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Maybe you should ensure the ground lead from the battery to the body is electrically sound, i.e. make sure the bolt/nut where the wire attaches to the body in the trunk is tight and the there is not corrosion or paint at that point.
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post #10 of 11 (permalink) Old 05-10-2015, 07:57 AM
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So, there isn't a second ground strap, but it's highly recommended. It really helps the motronic sensors. Probably the ones you have seen were put there by a smart mechanic. I suggest putting one from the top of your engine, off the rear of the valve cover, and attached to one of the bolts for the hood latch. It makes a huge difference


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If your wife has ever had to say, "hey move this thermostatic actuator so i can make dinner"...you might be an alfisti.
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post #11 of 11 (permalink) Old 05-10-2015, 10:41 AM
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Well, Mario's talking about the S3 plenum ground and you're talking about a ground to the valve cover/head, I think, Sicilian. I could see how the plenum could wind up electrically isolated if it didn't have a ground strap. Not sure how the head could: it should be well grounded through the head studs.

Still, adding grounds can never hurt anything. Did you actually see an improvement in something by adding the extra cable?

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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