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Registered
Join Date: Jul 2002
Location: Atlanta
Posts: 7,125
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weird charging problem on transplant car
My 73.5 T had a 78 SC motor. I just swapped in a healthier 79 SC ROW motor. It runs great except for two problems. The Tach does not work and the car is running off the battery but the idiot light is not on?? It took me several weeks to realize that the battery was not being charged. I have not driven it that much. Is it posssible the new motor came with an old externally regulated alternator - the chassis has no regulator because the old motor had an internally regulated alternator. Would the car even run like that? I am not to swift with electrical stuff.
Oh I did check and the volt meter reads the same at the battery wheather the car is running or not - +/- 12v. I dont even no what to check? Any ideas, does some body have an old regulator I can plug in and see if that fixes it? I know the alternator worked in the old car - I dont have access to see if it had a regulator on it. TIA
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erik.lombard@gmail.com 1994 Lotus Esprit S4 - interesting! 84 lime green back date (LWB 911R) SOLD  RSR look hot rod, based on 75' SOLD 73 911t 3.0SC Hot rod Gulf Blue - Sold. |
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07-24-2004, 08:10 PM
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Registered
Join Date: Jun 2002
Location: Richmond, VA
Posts: 1,418
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The '79 motor would have the externally regulated alternator. You'll need to either install an internally regulated alternator or backdate the car to the external regulator.
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David Dryden '86 911 Coupe '05 BMW X5 4.4i |
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07-25-2004, 05:14 AM
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