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Rennch on YouTube
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Just swapped alternators...now car won't fire.
Hi,
I have a 3 liter motor in my 72T. The alternator went bad, so I got a whole new fan/alternator combo. I marked the wires and took pics, and hooked everything back up to the right spots. Now the car turns over, but won't fire. Any thoughts? Thanksm mto
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Michael O'Neal - 69 RSR Clone(ish) - The build: http://bit.ly/69porschersr 69 911S Blasphemy Build on YouTube Rennch Youtube Channel: http://rennch.com/Youtube Instagram: https://www.instagram.com/_rennch_/ |
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09-24-2003, 03:11 PM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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Check for loose/disconnected wires (including wire from the coil to the center post of the distributor cap) at the coil and distributor. Jim
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09-24-2003, 03:53 PM
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Rennch on YouTube
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I looked...nothing apparent, but still checking.
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Michael O'Neal - 69 RSR Clone(ish) - The build: http://bit.ly/69porschersr 69 911S Blasphemy Build on YouTube Rennch Youtube Channel: http://rennch.com/Youtube Instagram: https://www.instagram.com/_rennch_/ |
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09-24-2003, 05:18 PM
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Join Date: Jul 2001
Location: NJ
Posts: 857
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Did you hook up the ground inside the alternator to fan?
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72 911 82 911 70 GTO  97 GT Ragtop 74/76 Jeep cj's |
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09-24-2003, 06:42 PM
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Rennch on YouTube
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yep...all the wires are hooked up. I hate the feeling that I missed one, but I'm pretty positive that I hooked 'em all up.
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Michael O'Neal - 69 RSR Clone(ish) - The build: http://bit.ly/69porschersr 69 911S Blasphemy Build on YouTube Rennch Youtube Channel: http://rennch.com/Youtube Instagram: https://www.instagram.com/_rennch_/ |
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09-24-2003, 10:39 PM
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Join Date: Aug 1999
Location: Denver, NC
Posts: 1,391
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Are you getting Spark to the plugs ??
Fuel pump on ? Did you disconnect the battery when replacing the Alternator ? Did you ground or short anything while replacing the Alternator you could have blown a fuse or a relay ? Just some things to check
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09-25-2003, 04:43 AM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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The car will run with the alternator disconnected. The problem must lie somewhere else.
Did you crack the coil re-attaching it?
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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09-25-2003, 05:00 AM
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Location: CT, USA
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How about the fuel pump relay. Just a thought.
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92 C2 Turbo Coupe, Gran Prix White Tial 46mm .5bar, k27 7200 11/11 LF Welded in Roll Bar, Sparco Pro2000 seats, RS Carpet Set |
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09-25-2003, 07:03 AM
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Join Date: Mar 2003
Location: Naples,FL
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Sorry to hijack your thread, but where does the ground hook up to the alternator? I pulled mine off without checking.
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09-25-2003, 07:29 AM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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terry..large brown wire that's attached to your case..connects to your alt, on a stud of the alt housing.
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09-25-2003, 07:58 AM
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Join Date: Mar 2003
Location: Naples,FL
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I meant, which bolt do I use on the alternator? I know where all the others connect I just missed this one.
BTW: You encouraged me to get my fan and shroud powder coated. Looks great. I post some pics later. |
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09-25-2003, 08:43 AM
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Rennch on YouTube
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Here's a question for you guys: I painted and clearcoated my fan and housing. Could it be that the coil isn't getting properly grounded, so it's not working? Because it's sitting on paint, instead of metal?
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Michael O'Neal - 69 RSR Clone(ish) - The build: http://bit.ly/69porschersr 69 911S Blasphemy Build on YouTube Rennch Youtube Channel: http://rennch.com/Youtube Instagram: https://www.instagram.com/_rennch_/ |
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09-26-2003, 08:50 AM
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Join Date: Jul 2001
Location: NJ
Posts: 857
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Id say its a good bet behind the plate i would scuff up the area where you ground those wires .
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72 911 82 911 70 GTO 97 GT Ragtop 74/76 Jeep cj's |
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09-26-2003, 09:07 AM
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Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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The coil doesn't depend on the fan housing for ground ... there is a braided ground strap tying the coil, distributor, and CDI-unit together in the engine wiring harness.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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09-26-2003, 09:10 AM
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Rennch on YouTube
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Hey fellahs...I got it! As it turns out, it was the battery all along. I bought an Odyssey 925, relocated it to the passenger side, rewired everything, and she fired right up after coughing for a bit! I guess it was just sitting too long. Sorry to waste the bandwidth, and your time.
Thanks to everyone.
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Michael O'Neal - 69 RSR Clone(ish) - The build: http://bit.ly/69porschersr 69 911S Blasphemy Build on YouTube Rennch Youtube Channel: http://rennch.com/Youtube Instagram: https://www.instagram.com/_rennch_/ |
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09-26-2003, 04:36 PM
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