kamikazez Posted October 5, 2008 Share Posted October 5, 2008 hi all, drove my car on thursday with no issues at all. on friday morning when i went out to start it i could hear the fuel pump running (the key was not in the car just so we are clear on that one). I turned the key on then off and the fuel pump shut off, and when i tried to start it it wouldnt, and the battery died shortly thereafter. i charged up the battery and tried to start it again, and after that the feul pump stays on full time. i pulled the plug from the back of the ignition switch to make sure and that didnt work, so i pulled the small silver relay box from under the dash and the pump has now stopped. upon feeling the feul rail with the pump running it felt like gas was continually running through the pipe. a. what is the little relay box under the dash called? it has two seperate plugs on it? its all corroded so i assume its part of the problem. b. could the fuel regulator be possibly faulty. its a 1975 280z btw. Thanks in advance to any replies. Quote Link to comment Share on other sites More sharing options...
kamikazez Posted October 6, 2008 Author Share Posted October 6, 2008 ok so i figured out that the relay is the efi relay set, which powers up the feul pump/efi unit. pulled the cover off and it is toast. my next question is would the lack of power to the efi unit keep the ignition coil from firing? Quote Link to comment Share on other sites More sharing options...
jamunm90 Posted October 13, 2008 Share Posted October 13, 2008 You've got an electrical problem somewhere, likely a short or grounding issue. No, the spark signal comes from the distributor. The fuel pump shouldn't run without the key in the "on" position. Until you find this out and fix it, there is no telling what the issue is. Shorts and grounds can cause back-circuits and all kinds of wierd things begin to happen. This likely caused your EFI relay issue. Replacing it with a new one will likely result in a new burned up relay. Time to pull out your voltameter and trace the battery drain to the source Quote Link to comment Share on other sites More sharing options...
kamikazez Posted October 14, 2008 Author Share Posted October 14, 2008 just figured it all out last night. i replaced the little double relay box as it was corroded beyhond repair. It still wouldnt start but the fuel pump didnt run constantly. pulled the connector to the cold start injector and turned it over. it started right up. Shut it down and reconnected the injector and everything seems to be working now. Thanks for your reply . im just glad to have my z back. Quote Link to comment Share on other sites More sharing options...
woldson Posted October 16, 2008 Share Posted October 16, 2008 I will say this, very nice work! You solve your issue very quickly without conplaint. Well done. Quote Link to comment Share on other sites More sharing options...
Oddmanout84 Posted November 6, 2008 Share Posted November 6, 2008 threads like these give me hope that I'm getting close to my problem's solution Quote Link to comment Share on other sites More sharing options...
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