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Thread: 1975 280Z EFI Problems HELP

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    Default 1975 280Z EFI Problems HELP

    Hi I'm new to this page and the car only owning it for 2 months. Being 17 and being used to dealing with carburetors. So to the issue it is running rich I have replaced the coolant temp sensor and the 7th injector plug, have adjusted the air/fuel screw also but still getting too much fuel, please help.

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    If you read a few more threads on "running rich" you'll see it recommended often, to measure resistance of the coolant sensor circuit at the ECU. There are several connections along the way that can add resistance. What the ECU sees is what matters.

    Download the Electronic Fuel Injection Guide from the first link below. Get a meter, even a simple one will do. Try to find a way to measure fuel pressure. Read the Engine Fuel chapter, especially the first few page, if you want to understand how all of the parts work together. You'll waste a lot of money if you just guess and replace parts.

    XenonS130 - S130 Reference

    Amazon.com: multimeter

    XenonS30

    Index of /FSM/280z
    1976 280Z, with some minor modifications

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    You've asked a lot with a few words. Here's more reading for you, Z Tech Tips EFI & Fuel (AtlanticZ.ca) || | | | | | | |
    1972 240Z #918 New Sight Orange
    1977 280Z #305 Light Blue Metallic
    1972 240Z #110 Persimmons Red

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