 73 2.0 Has Issues, Ran GREAT and then it didn't |
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| Minerva's 914 |
 Sep 21 2018, 08:57 PM
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Member  Group: Members Posts: 378 Joined: 24-December 15 From: Chapel Hill, NC Member No.: 19,489 Region Association: South East States 
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1973 914 2.0 restored and motor rebuilt by Fat Performance and installed by Black Forest Racing. We've driven her off and on for about 750 over the past year with no problems, in fact she ran fantastic .... until she didn't. Driving around the neighborhood last week the engine bucked a few times with the tach dropping to zero before bouncing back to normal, downshifted and it seemed better only to return again while cruising along at 2800 RPM, down shifted again and since we were only a block away from home made it with no drama. Was thinking maybe an electrical issue shorting out the ignition.
I started the car yesterday evening and backed out of the garage and it stopped dead in her tracks. Turned the key to 0 then back on again and no fuel pump buzz. Proceeded to engage the starter and after several seconds of cranking I returned the switch off, then back on again. No fuel pump buzz. Checked the relay in the circuit board, switching out the relays, no change. Checked the fuses and connections seem clean so I jumped directly from the battery to pin 12 on the circuit board, turn the key to 1 and got the fuel pump buzz, turned off and back on again got the fuel pump to work. What do you guys think should be my next step? I planning to get on it early tomorrow and start chasing the wiring but hope someone here might help me narrow down the possibilities. Plan to remove the circuit board, turn it over and check the connections and double check the grounds and then check continuity from the brain, then work my way to the inside fuse panel and wherever else the electrons are circulated before reaching the fuel pump. As always THANK you guys for all you do to help the 914 live on!!! Brady |
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| Dave_Darling |
Sep 22 2018, 10:48 PM
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914 Idiot Group: Members Posts: 15,051 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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If the tach drops to 0 even though the engine is still spinning over (even though it isn't firing) then your ignition system has a problem. Could be the power to it, could be the switching part, but something in there has a problem.
If your "tach goes to 0" didn't mean what I said, above, then it's much less of a clue. Still, not a bad idea to verify that your'e getting spark when the engine won't run. --DD |
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Posts in this topic
Minerva's 914 73 2.0 Has Issues Sep 21 2018, 08:57 PM
iamchappy The temp sensor mounted in the head goiing bad can... Sep 21 2018, 09:03 PM
Minerva's 914
The temp sensor mounted in the head goiing bad ca... Sep 21 2018, 09:07 PM Minerva's 914
The temp sensor mounted in the head goiing bad c... Sep 22 2018, 09:37 AM JeffBowlsby Maybe you tried two bad relays? Or the circuit bo... Sep 22 2018, 10:54 AM Minerva's 914
Maybe you tried two bad relays? Or the circuit b... Sep 22 2018, 11:45 AM Minerva's 914
Maybe you tried two bad relays? Or the circuit ... Sep 22 2018, 11:48 AM Rob-O Ignition switch. Sep 22 2018, 02:03 PM IronHillRestorations Trigger points? Sep 22 2018, 05:19 PM Minerva's 914 Okay, here's were we are;
Pulled the circuit ... Sep 22 2018, 08:47 PM JeffBowlsby The ECU would be the last thing to suspect, they a... Sep 22 2018, 08:58 PM Minerva's 914
The ECU would be the last thing to suspect, they ... Sep 22 2018, 09:46 PM Minerva's 914
If the tach drops to 0 even though the engine is ... Sep 23 2018, 05:59 AM JamesM
If the tach drops to 0 even though the engine is ... Sep 23 2018, 11:47 AM ottox914 Had a similar problem with my car.
Ignition swi... Sep 23 2018, 08:23 AM Minerva's 914
Had a similar problem with my car.
Ignition sw... Sep 23 2018, 09:05 AM mepstein Due to aftermarket shift knobs, many people miss 1... Sep 23 2018, 08:57 AM Minerva's 914
Due to aftermarket shift knobs, many people miss ... Sep 23 2018, 09:07 AM Minerva's 914 Okay, so after a long delay involving travel, phot... Feb 4 2019, 10:24 AM Cairo94507 I really enjoy seeing these issues get worked and ... Feb 4 2019, 11:11 AM second wind Great post....thank you very much. How much was t... Feb 4 2019, 03:46 PM Minerva's 914
Great post....thank you very much. How much was ... Feb 4 2019, 10:16 PM second wind Well never say never....I have a 73' L96M 2.0 ... Feb 4 2019, 11:48 PM |
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