Fuel Injection
Posts about fuel injection systems and related topics.
748 topics in this forum
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The hose from the AFM to the throttle body is cracked so I'm taking things apart and cleaning them up before i put a new hose on. I see the service manual says not to get water in and/or around the AFM. What would be the best way to clean both the outside of the AFM and inside the barrel of it. For example, would it hurt the AFM to get some kind of carb clean and take it outside and spray it down? Or is there a better and safer way to clean it up? Thanks Gary
Last reply by Healeyalt, -
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about a week ago while worming the car i noticed a smell of gas coming from under the hood.my car usually smell like exhaust but this smell was pure gas. i turn off the car and noticed the middle injector was crying gas. the leak seems to come from under the connection. actually like mid way of the injector that's visible. after i found that i stop driving it that day. the next day i was going to show the problem to a friend but it seemed to disapear we ran it for about two miles with no leak. Then yesturday it came back, but today it ran without any leak AGAIN.is this injector bad or can it be fixed.has anyone had a similar problem.by the way in youtube a person had the …
Last reply by siteunseen, -
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So I bought a 77 (made in 76) 280z that was dead and stuck the engine/transmission from a 79 280zx 2+2 into it, the thing is, its always had an issue where it would idle really low at a rest,more so when warm, around 500, when i have the idle set to around 1600 when hot just to combat this problem. Anyway i figure out it was most likely the MAF so i ripped it out, cleaned it up, put it back in, and it was working almost perfect for awhile, but now it seems to have died completely. The point of this post is; it never did really work quite right, and my zx engine is slightly different from that of the 76 i put it in, so which MAF do i buy? Will one for a 79zx work better t…
Last reply by Xenn, -
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Hi guys, Ok, so I'm looking at a project this year. My car is fully restored and I've got triple Mikuni's installed. It's a great system, but, just coughs and sputters a bit too much for me. I have a full EFI system out of a 78 280z including computer and intake with brand new injectors. Does anyone have a tech article on making the swap happen? That said, is it possible to use my existing fuel supply piping and fuel tank (I've got a '71)? Mike
Last reply by Pomorza, -
Anyone that has read my "I think I'm getting somewhere post" and other EFI post's know that I am chasing a fuel pump shut off issue. My question is; is it normal for the fuel pump to run with the EFI relay unplugged? That's both the white and black connectors unplugged. The fuel pump still runs in the "on" position, engine not running. As you can tell I'm drawing at straws right now because I'm running out of things to test using my FSM. I'm always able to find and fix any problem with my cars but this one is baffling. Appreciate any help at this point. Bob
Last reply by FastWoman, -
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What should the resistance be for the air temp sensor inside the AFM? I have read 2500 ohms. In both of my AFM's they only read between 1700 & 1800 ohms. Should I be concerned?
Last reply by rcb280z, -
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Has anyone replaced rotted hard lines from the tank to the engine with braided ss lines? I know folks that hve fuel cells in place of the stock tank use them and I'm considering doing the same just with the stock tank. Would I be able to cut the barbs off the lines from the tank and flare them for -an fittings? Thanks for any replies. BTW, tried the search function w/o success.
Last reply by rocketdog, -
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Hey guys....I'm trying to fix what is basically an extended cranking problem on a 280 that's been warmed over with a cam and some head work. My customer wants it to start a bit quicker on initial start up. I figured it was just an issue of the engine building up some compression first with the larger cam but after digging in a bit it looks like the cold start injector isn't working. I followed the FSM tests...if I jumper the injector off of the batter directly it cycles and squirts a small amount of fuel...which I assume is ok since the fuel pump isn't running when I jump it. However I ran a meter on the thermo switch and it didn't seem to meet the specs outlined by th…
Last reply by RPM Resto & Custom, -
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My car's had the hot start stumbling problem more often recently so I decided to try something. In my case, the problem seems like a lean condition, based on the intake backfires and the lack of gasoline smell or smoke in the exhaust. I also noticed that if the temperature gauge went higher than usual, like up to the middle of the M, that the problem was likely to happen. So I bought a 5 kohm Audio Taper Potentiometer and spliced it in to the water temperature circuit as a rheostat (two wires connected, one left open). Mounted it by the hood release handle in the cabin so that I could tune it when needed. It's basically the part behind the volume knob on an amplifier.…
Last reply by grantf, -
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Purchased a 0-60 psi fuel pressure gauge from Summitt racing about 6 months ago and it is faulty (I think). It periodically reads incorrect. Anyone else have the same issue? If so, which pressure gauge do you use now? Thanks.
Last reply by rcb280z, -
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When the heater blower motor is not running the idle is a little rough......you turn the fan switch on high the idle smooths out. I suspect this is a grounding issue, power draw, or relay issue. I wanted to see if this is a known issue, before I begin troubleshooting. It's comically repeatable, and I would normally expect the opposite behavior. I have good charging regardless if the blower is running or not.
Last reply by xubuntu, -
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My intake holes are a little off from my cylinder head. Is it worth the time grinding it out or just leave it? Maybe try and make the air flow better by rounding off those edges. It's a bare intake so no worries about shavings getting into things. Suggestions please.
Last reply by LeonV,
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