Fuel Injection
Posts about fuel injection systems and related topics.
748 topics in this forum
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Hi guys! What is the size of the hose from the fuel tank to the fuel pump on a 1977 280z? The fuel line got a small tear and I decided to replace it. I read on the forum that this line is a 12mm line rather than the normal 5/16, but the 12mm line doesn’t fit. The hose is somewhat snug on the fuel pump, but is very loose on the gas tank outlet and I can’t fit the hose through the cutout in the bulkhead. Thoughts?
Last reply by EuroDat, -
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I recently had the fuel tank refurbished on my 1975 280Z (fuel injection). I’m also going to put on a new OEM fuel pump. It has had both of them off for about six months, so I’m wondering when I put the gas tank and fuel pump on do I need to bleed any lines or just let the fuel pump do its work. I have no experience with fuel injection. Thanks E
Last reply by S30Driver, -
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A couple of the fuel injectors on my "78 280Z (originals) are beginning to foul up so I've decided to change all six once I pull the fuel rail. Searching I've found very different offers form ZCar Depot ($79 each + $0.60 per O ring), MSA ($63 each, all included) and Zcar Source ($149 each). They all state "NEW, not refurbished. The MSA injectors have a black body, maybe plastic? The Zcar Depot and Zcar Source injectors seem to have a silver metal body (but I'm just judging by the pictures).I can't find any posts with straight recommendations as to which fuel injector set to buy and why so I need help, please. Thanks in advance.
Last reply by 280zdude, -
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I'm n the process of converting my 260z (stock motor) from dual carbs to EFI ITB. Started to collect the various parts and doing my homework. I have a good understanding on the conversion but still not clear on how the vacuum lines should be set up. The ITB intake manifold I have has a single vacuum nipple which is used for the brake booster. When I convert this to EFI: Can I leverage the same vacuum line and add a T? Or is it better to tap into all the intakes and hook this up to a vacuum manifold? I will have to drill holes and tap into this if I take this route. I thinking I will need the vacuum to connect to the following: Brake b…
Last reply by YZFMax, -
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Hey guys! So I bought a 1977 280z that has been sitting for some 30 years. Earlier this year I redid the engine and all of its components, and a new fuel system front to back . Upon start up it ran, but wouldn't rev past 1200rpm without holding the throttle down. Checked the AFM and noticed the flap was bobbling and barely moving. When I manually held it open The car ran beautifully and could rev quick and easy. So it got me thinking why the flap wasn't opening. Of course vacuum, and I remembered I am an idiot and never plugged the ports I left open after deleting the EGR/BPT valves (I got long tube headers). Anyways, I have searched everywhere, but no one seem…
Last reply by Captain Obvious, -
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Greeting forum members recommend fuel for our car is 87 octane as fuel today is much more advanced than it was designed years back. User manual stated otherwise that at least 91 octane. what do you guy use on stock engine? much appreciated
Last reply by 75msuar, -
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New to me ‘75 280z. It has less than 60k miles. It was driven infrequently for the last 15-20 years. Drained the full tank and the gas at the bottom was very old and dark. Car starts fine when it’s cold. Runs well. Idle is the tiniest bit rough but holds. The issue is hot start. It will stutter on cranking and take longer to start. Then it barely runs and sounds like it’s running on less than 6 cylinders. I have to hold down the gas pedal and it will miss and buck for a few seconds. Then it clears up and runs ok. I can drive it normally and it will idle. It has new air and fuel filters, plugs, wires, points and distributor cap. I’m going to throw in a can of…
Last reply by maj75, -
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Hi all, decided to share my recent install of Datsun Spirit ITB's. Got tired of fiddling with the SU's and I always liked the look of 6 velocity stacks on these engines. A friend at work loves my car, but he is a young guy who likes modern stuff! He tried to get me to swap in an RB26, we compromised on ITB's. He provided his garage and his labour for the privilege of working on the car! The motor is bored out 85mm, 280Z crank, 268 comp cam with a street port and polish, it was always very finicky with the SU's, for some reason the weather seemed to affect the way it ran and idled, and it always ran rich even with nozzles turned down to only a 1/2 turn from closed. Anyway…
Last reply by northernz, -
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Hi Guys, I desperately need some help. The car is 77 280z Auto. The car cranks up and starts as well. It was sitting for 7-8 years. Néw oil in engine / trans. Now after it cranks up there is no throttle response. You can floor the paddle and it does not rev up. where to start with? Should I clean the fuel system since the car has been sitting? We put new fuel filter, injectors are new standard from rock auto. I am not sure about AFM or any other air intake stuff. please guide where to begin with on this throttle response issue. regards.
Last reply by zKars, -
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Hey guys I have a 77 280z and I was wondering what is the highest compression ratio that can be run with the stock efi system? looked online there is a lot of information but nothing specific to the stock efi that I’ve seen.
Last reply by siteunseen, -
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Hi guys, Having a really strange cold start valve issue here. My cold start valve is not firing when connected to the harness even though it is getting the ECU signal to do so. I connected the thermotime switch's bullet connectors together to simulate an "on" signal from the ECU which got power to both sides of the CSV's injector plug during cranking (with those connectors unplugged, the csv's plug only receives power on one side according to my test-light). However, the csv is not firing when connected to the harness (I pulled the csv out of the intake manifold and put its end into a cup to collect the gas and got nothing). I left the nozzle in the cup …
Last reply by TomoHawk, -
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This is all around the master cylinder. Was just lying there when i got the car so not sure its necessary...thanks for any help
Last reply by siteunseen,
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