Fuel Injection
Posts about fuel injection systems and related topics.
751 topics in this forum
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Been trying to tune the car. Idles really well. Seemed gutless on the road though. Pulled injector connectors one by one and each one made it stumble, sans #6 cylinder. Switched the #5 and # 6 connectors and still with #6 injector disconnected did not make engine stumble. Interestingly, with the #6 connector on #5 injector, it idled fine until disconnected, then stumbled. I figured it was the #6 injector (a new to me rebuilt one). Bench tested fine with 9 volt battery, sprayed carb cleaner really well. So, now I think it's cleaned out, reinstall. In my mind the #6 injector connector is good because it fires the #5 injector and the #6 injector obviously sprays when vo…
Last reply by Roblaw, -
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Just beginning to resurrect the rear portion of the fuel system. Working with the great info from this site on the fuel damper. Hopefully we will track one down. Is the OEM pump the way to go for a stock EFI engine or will an aftermarket unit do the job? Huge price differences. O'Reilly offers their IMPORT DIRECT brand that appears similar in size and design with correct size inlet and outlet sizes and 2 terminals. Most of the other aftermarket units seem to be "CAN MAKE IT FIT" varieties with several fittings, rubber cushions, etc. Would it be wise to install a fuel filter between the tank and pump? Any suggestions on an inline filter with 1/2" barbs? What is th…
Last reply by One Way, -
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I am looking for a rebuild kit for my 1972 Z car mechanical fuel pump. The original equipment model is a Kyosandenki. i am trying to keep the original unit and do not want to go to an electric pump. There are a number of replacement options but i want to rebuild this one. Have checked all the sources i can think of without success so far. Wondering if i'm on a fools errand. Any leads would be greatly appreciated.
Last reply by swflaz, -
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looks like I may have to find one of these for messing with on my next trip to the JY, old Benz. For my trip on the Alaska highway... see #4 I don't know if my ECU is wired up for a connection to pin 12 wirign diagram.pdf
Last reply by SoCalJim, -
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One of my off season projects for this year was to replace my sketchy looking intake duct tube between the AFM and the throttle body. I couldn't see any cracks all the way through, but it's just a matter of time. I know there are aftermarket repros available, but I've always kept my eyes open for other cars that had air intake tract hoses that looked similar to the 280Z. With that in mind, and my never ending quest to find cheap ubiquitous replacements for OEM parts, I nabbed this on off a 2002 Ford Taurus: Here it is compared to the stock connector. The angle is almost perfect, but there are some issues. First, it's a little too long and second, the big end (AF…
Last reply by 240260280, -
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Back again...as stated in my other posts, got the z running again...haven't had much time to evaluate further but need advice on some obvious issues: 1) Correct FPR...have read much on site and it seem that the 78 should have an FPR with one outlet and not two as mine has... Currently blocked of is the side toward the radiator. Should I replace this? are correct ones available? is the "blocked off" option dangerous? 2) Fusible links...mine are broken and covered with duct tape (PO). Are these available...need bracket too? 3) High idle...Steps to check 1,2,3 etc
Last reply by zeenubee, -
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Still trying to get this 78 running...old mechanic working on it for me ( I know very little)...have drained tank, PO seems to have cleaned it; new fuel pump (walpro); gaslines blown out; fuel pressure tested at filter(new) at about 45#; he says he checked and cleaned(?) all electrical connections; new fuel injectors (ebay) and seals; AFM cleaned. Now he says he checked the TPS, cleaned contacts and it runs "better" but not like it should...aftermarket TPS seems to be only available now thru the zcar place in Ariz at $125.+ Any suggestions before I throw more parts at this thing?
Last reply by Zed Head, -
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My tank was super rusty, with rusty fuel pouring out of my under hood filter when I pulled the hose off. So, Pulled the tank. Local radiator shop (the only one that would hot tank fuel tanks wanted $485 to clean and seal with over a month turn around time). So, I set out to clean it myself. Tried a few methods and here are my results: shook out 10 pounds of dirt consistency rusty crap and rust flakes out of it. Used electrolysis for 2 days, changing out the sacrificial steel and soda solution several times. Some, but not great results. Next, swished about a gallon of 1:4 muriatic acid:water a few times, then let it sit over night full at same ratio. It was looking pretty …
Last reply by dhp123166, -
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Chock another FI problem to corroded wires. 1975 280z new to me. Got it running after new injectors and rehabbed fuel tank. It ran well until it warmed up then would sputter and eventually fail to start. Would start when cooled off but eventually it wouldn't do that either. Plugs were drenched in fuel. If I pulled the PCV hose off air intake hose it would run but not well. I blocked fuel line to cold start valve but no change. Next pulled connector to coolant temp sensor and snapped it back on, no change. Then traced wires back to the 2 bullet connectors, pulled apart, shorted them to each other and voila, it started, albeit it popped and stumbled until warmed up. I figur…
Last reply by Roblaw, -
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Hi guys, My '78 has the weber "big throat" throttlebody on it but with the (I believe) stock AFM. Would upgrading to a larger AFM noticeably improve throttle response considering the larger throttlebody or is that just a lot of fiddling for marginal gain? (yes I saw the atlanticZ page) If there really is noticeable gain to be had with going to a larger AFM with my larger throttlebody, do you folks recommend the 280zx turbo or cressida AFM? I've been doing a lot of reading on them but couldn't find a stern verdict. Any ideas? -chase
Last reply by chaseincats, -
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Progress continues slowly on this resurrection project. Acquired the car a few years back. Had not been registered since 1996 and the storage years were not very friendly to this amazingly 100% complete and original car. Being over 40 years old and badly sitting for some 20 years, the fuel system needs a total restoration. I am cleaning up the fuel rail-bit of surface rust in areas- and will be painting it with hi temp engine spray, primer and top coat. I am assuming the fuel pressure regulator is bad, and know all the injectors are bad. Am I better off to just replace the pressure regulator with the OEM factory style, or upgrade to an adjustable unit with a gauge? …
Last reply by Yarb, -
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My 73 Z won't start. Turns over and starts with a few squirts of starter fluid then dies unless I keep squirting it in. Assumption is that it's not getting gas. I changed out the fuel filter and no difference. Plenty of gas in the tank. The engine was rebuilt a few years ago and the carbs all redone by Z therapy. Ran beautiful for the last few years (only about 500 miles put on it.) It would start right up. Since the rest is all original components I assume I have just the mechanical fuel pump in the front passenger side of the engine which I believe a new one was put on after the engine rebuild. How can I test it to see if that's the problem? If I take the line o…
Last reply by colinc,
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