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> Help! battery installed backwards!
Petros
post Jan 11 2013, 01:50 AM
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Hi all,

New to this forum, but not new to fixing old cars. I was told you might be able to help, I am helping a young friend who has a 1976 Porsche 912E with the FI system that I think is the same as the 914. It has not been running for some 5 years except for the rare occasional start and short run.

Somehow the battery was installed backwards during one time when it was removed for recharging (IMG:style_emoticons/default/sad.gif) . I came over to help get the car started after it had not been running for about 8 months, the owner installed a new battery (swore he put in it in the same way it came out (IMG:style_emoticons/default/confused24.gif) ) and he was cranking and cranking it when I arrived. I found no spark and no fuel, and noticed the dash lights did not come on with the key in the "run" position. I inspected the battery and discovered the leads were connected to the wrong terminals. We corrected that and now the dash lights came on, but of course the car still would not start. Appears to have no spark since it would not even sputter when I sprayed starter fluid into the air cleaner (as a test).

So my question is, what most likely has to be replaced? I was surprised to find that this model still had the points and condenser distributor (rather than electronic ignition) even though it has the bosh electronic fuel injection system. It seems the ignition system should have not been harmed but it appears I am getting no spark. Also, how much damage would have been done to the fuel injection system? Anything else we should check or be concerned with?

Thanks
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Posts in this topic
Petros   Help! battery installed backwards!   Jan 11 2013, 01:50 AM
Rand   It cranked with the battery backwards? Sorry, I kn...   Jan 11 2013, 01:57 AM
Petros   It cranked with the battery backwards? Sorry, I k...   Jan 11 2013, 03:21 AM
budk   It cranked with the battery backwards? Sorry, I ...   Jan 11 2013, 05:49 AM
Spoke   ..the proper way to test for spark is to ground t...   Jan 11 2013, 06:09 AM
billh1963   I suspect it was cranking backwards, but yes it...   Jan 11 2013, 06:57 AM
euro911   IIRC, this looks exactly like an old thread from s...   Jan 11 2013, 02:31 AM
Rand   IIRC, this looks exactly like an old thread from ...   Jan 11 2013, 02:42 AM
Petros   IIRC, this looks exactly like an old thread from ...   Jan 11 2013, 03:13 AM
euro911   He'll do it again too ... when he gets older :...   Jan 11 2013, 02:58 AM
Tom   A battery installed backwards can do damage to th...   Jan 11 2013, 03:11 AM
bulitt   I'm willing to bet the electronic fuel injecti...   Jan 11 2013, 07:08 AM
jdlmodelt   I'm willing to bet the electronic fuel inject...   Jan 11 2013, 07:32 AM
budk   I'm willing to bet the electronic fuel injec...   Jan 11 2013, 08:02 AM
Bartlett 914   Condenser could have shorted. Electrolytic caps do...   Jan 11 2013, 08:57 AM
Dave_Darling   Use an extra spark plug to check for spark. I lik...   Jan 11 2013, 09:54 AM
stugray   If you reverse the voltage on a DC brushed commuta...   Jan 11 2013, 09:54 AM
rick 918-S   One thing at a time. First get a test light or vol...   Jan 11 2013, 11:13 AM
carr914   IIRC, this looks exactly like an old thread from...   Jan 11 2013, 11:16 AM
Petros   thanks for all the suggestions. I have all the to...   Jan 11 2013, 05:28 PM
The Cabinetmaker   When power was applied to ground, the condensor an...   Jan 11 2013, 06:04 PM
Dave_Darling   Fuel in the intake is a hopeful sign--it is likely...   Jan 11 2013, 07:50 PM


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