Fuel Injection
Posts about fuel injection systems and related topics.
748 topics in this forum
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Since there has always seemed to be a lot of threads with people in need of help with their 280z EFI systems, I have come up with an idea that might get those people in need of help on the right track and give them a little basic knowledge about how the fi's on these cars work! This in return would give us a break on not having to explain everything and how the efi system work so often as they could refer back to the sticky post for those types of questions. Not only this, but they could refer back that post for example and they will know what the parts are called so there wouldn't be anymore of the "black part on the top left", but the actual name and part so we would kn…
Last reply by zspert, -
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Hey, I went to try and fill my 240z to a full tank for the first time and after putting in ~5.5 gallons (from a little under 1/4 tank on the fuel gauge) noticed a decent amount of fuel coming out the bottom of the car. I got underneath the car and noticed it was leaking a lot from the evap hose at the top/rear of the tank. The hose looks a little kinked and it looks like it was pouring out from where it was kinked. It was leaking down from that spot to the front corner of the tank and down from there. I *think* that's the only source of the leak. The car leaked for quite a bit before it finally got below the level of that hose and stopped. The fuel gauge is sitting at jus…
Last reply by hotsho111, -
Tried to take the Z out for dinner last night, and only got a block from the house, no throttle response, engine stalled. Restarted readily, but would only idle. WBO2 indicates that the system goes waaay lean when any demand is placed on the delivery system. Today I looked it over. Again, the car would idle fine - but - sometimes (ugh) the pressure (mechanical gauge after filter, before rail) drops off until the engine stalls. Blipping the throttle would sometimes make the regulated pressure pop back up. YT Vid What is bugging me is what the heck in the system could cause the pressure to drop off & then pop back up? I'm not familiar with the workings o…
Last reply by HusseinHolland, -
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I'm working on a minor project because I'm odd that way. I'm looking for the connector off of the stock ECU. I don't need the computer, just the connector that's on it. Anyone have any junk ECU's or have any ideas where I can find one?
Last reply by LorenB667, -
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Hi guys, I just purchased an air/fuel mixture gauge (https://www.amazon.com/gp/product/B00N3VGPYS/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1) and was wondering where to find the number the car should read when driving/idle. Has anyone done this before? The FSM shows fuel percentages but that isn't readable on these gauges it seems. -chase
Last reply by chaseincats, -
- 3 followers
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Ok, I have a 71 240 that I'm converting EFI. This means using an EFI fuel pump. My usual MO here is to retro-fit an in-tank pump. Quiet, secure, self filtering, blah blah blah. Done it to my old 73 years ago and to a couple of my 510's since. Easy peasy as they say. Well the 510's are easy. Lots of room above the tank. Not so much on Z's. If you want to mount the pump in the top of the tank, there is no or very little room between the floor and tank top, and you have to cut a wee hole in your deck then come up with a way to cover it. Then put up with a lump back there for ever more. Not perfect. Well until Vintage Tanks just announced a new product. ht…
Last reply by zKars, -
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Hi guys, quick question. Rockauto seems to have reman 5-pin AFMs in stock where the Canada spec one is half the price of the federal emissions (guessing that means USA) spec version. Anyone know what is the mechanical difference between these?
Last reply by chaseincats, -
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Hey guys! I am away from the car at the moment and I wonder if anyone knows the throttle body bolt spacing for the N42 intake manifold on the 76 280Z. I am looking at an aftermarket 70mm throttle body with 65mm bolt spacing. I seem to remember the stock throttle body was 60mm...? Can anyone help? @Captain Obvious perhaps? Thanks!
Last reply by wheee!, -
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I made a start on redoing the fuel lines. I used sleeved 10mm nitrile line with quick-connect fittings. The ends are clamped to the hard lines, and are not intended to be removed moving forward. The quick connect fittings allow you to disconnect the rail from the feed & return. Did the return first. Rerouted behind the filter to get it away from the motor. Support bracket previously attached to the filter clamp is now secured it at the inner fender QC fittings for the (Volvo application, Mahle KL 196) filter needed a longer M5 bolt while I was there I added a branch to allow me to add the fuel pressure gauge (M10x1 …
Last reply by darom, -
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Wondering if anyone has done this. I found a thread on HyridZ where the main suggestion was to simply bridge 36/39 w/key on to engage the fuel pump. That appears to be a viable approach, if it comes to that. I need to do this as cold start definitely is impeded by lack of system prime. Hot or warm starts are pretty rapid in terms of cranking time What I was thinking was more along the lines of a timer/delay circuit that would run the pump for 3-5sec when the key is turned, anywhere in ACC or On, so that no additional input is required. I've found a range of timer relay/circuit boards that would possibly do the trick, the issue seems to be making it only run once with…
Last reply by HusseinHolland, -
- 3 followers
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Hi guys, I am looking for your advice before I open my AFM unit and start messing with it. Symptoms: when the car is cold, it runs very lean, bogs down, popping noises, lack of power. When it warms up, more manageable to drive, although it occasionally makes the same popping noises. it also smells lean from the exhaust. What has been done: 1. Remanufactured AFM, sealed up. Adjustments to the air bypass screw don't help richen up the mixture. 2. I went through all the FI Book tests, the air temp sensor in the AFM/water temp sensor in the t-housing, all pass. Cold and warmed up. 3. Throttle positive switch - adjusted, at idle, middle position a…
Last reply by darom, -
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I might as well post this up. I just got back from a long drive, with several stops, and not a sign of the heat soak problem. I've made several changes but I think this would be easy for anyone to do, with an adjustable fuel pressure regulator as backup for any tuning, rich or lean, that needs to be done. Since it's only me for now though, the risk is there that I just got lucky. Hopefully it's real, I don't want to cause anyone to waste time or money. I’ve been running more modern injectors (1989) for five days now, and they seem to be immune to the heat soak problem. Or the overall modified fuel system is. I’m using 14 mm injectors, Bosch 280 150 901, with the inj…
Last reply by Captain Obvious,
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