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brapattack

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About brapattack

  • Rank
    Member
  • Birthday 04/08/1987

Profile Information

  • Gender
    Male
  • Location
    Austin TX
  • Cars
    1977 280z w/ L28ET swap
  • Interests
    Motorcycles, bicycles, metal fabrication and board games
  • Occupation
    bicycle/motorcycle fabricator and SPFX
  1. brapattack

    [new title] 77 280z w/ l28et regeneration

    I've been moving real slow on the 280z. Moved to Atlanta from Texas and had to get a different daily driver to use while I tinker on the 280z. Currently living in an apartment means no garage space. I did the 300zx ecu conversion but am still trouble shooting it. The car had already had the 280zxt bits all moved around so even following Afshin's guide I couldn't do the fuel pressure relay mod in a smooth way. Right now it seems to run good at the start and then get worse as it warms up and gets to be running too rich. The 300zx ecu is supposed to control the fuel pump rather than it always being on. I thought that that could be causing the rich situation....but with the fuel pressure being regulated at my fuel rail it seems like the pump being on/off/intermittent wouldn't force the extra fuel through. I'm going to try lowering fuel pressure. I tried turning the idle mixture screw on the MAF but it didn't do much. I also need to learn the LED green and red blink language of this ECU so that I can see if there are other faults making it run in some kind of safe mode.
  2. brapattack

    [new title] 77 280z w/ l28et regeneration

    This car is still set up with the single wire, narrow band O2 sensor, as far as I know, the wide band ones didnt kick in until the later 80s 300zx ECU setups. My sensor is an NTK specified for use with 79-83 280zx cars, which is the motor and ECU i have. The air/fuel ratio gauge is an equus 8366 Im gathering parts to do the 300zx z31 computer, MAF and crank angle sensor. The car is not actually running lean (as far as I can tell) and it survived that long roadtrip fine so I'l probably just wait till I do this swap to try again getting an accurate air/fuel ratio gauge working right.
  3. brapattack

    [new title] 77 280z w/ l28et regeneration

    Hey all, I recently added an air fuel ration gauge to try and see if I'm running in the right range and it does nothing but say full lean no mater how I adjust the AFM or fuel pressure. I tried going way with no change to the gauge reading so I am guessing/hoping its just somthing up with the gauge or how I wired it. Anyone else have problems like this or a fix to try? Its just +/- wires and a wire to the o2 sensor. I think I should run a new section of the shielded wire because mine is in bad shape but not sure if thats what could be causing this.
  4. brapattack

    Pic's of your Z

  5. brapattack

    [new title] 77 280z w/ l28et regeneration

    Okay, been doing lots of driving. Currently about 4500 miles on the trip so far and going pretty smooth. I replaced my fan clutch in southern california cause it had seized but hadn't thrown the fan to pieces yet. Only other thing is I have to keep topping off the disc brake master cylinder, going to put in a couple new hardlines while I am here in CO. After fixing my timing and adjusting the AFM/fuel pressure a bit my MPG seems to hover around 20-22.
  6. brapattack

    [new title] 77 280z w/ l28et regeneration

    I'm a couple days into the road trip in the 280z and I've found that my mileage when I cruise around ~75 is 18.5 but if I cruise above 80 it drops way down to the 14s. I think I must still be running rich or something cause it should be better. Slowly dialing down the Afm and fuel pressure to see if that helps. Car is running plenty cool and oil pressure has been good. I am losing brake fluid from the front brakes system. There are no leaks at the wheels and the master cylinder is also new and showing no leaks. Trying to find where in the hardline must be seeping. Oh I should take a picture of my heater hack and will upload some photos when I have computer/wifi.
  7. brapattack

    Pic's of your Z

    I dig it. What oil cooler do you have hanging off the front there?
  8. brapattack

    [new title] 77 280z w/ l28et regeneration

    Yeah I should probably do the smoke trick. Currently trying to get the stock pop off valve off so I can block that hole. Its hard to get my boost up and to stay up. Got a 240z front bumper mounted. My heater core valves were leaking and getting "new" ones or rebuilt ones is expensive so I am putting in a 3 way ball valve with some hoses to basically have an open to shut to the heater core system. Trying to figure out with of the little vaccuum hoses in there go where so I can actually select which vents vs defrost might be tricky as the three i found weren't attached to anything.
  9. brapattack

    [new title] 77 280z w/ l28et regeneration

    hey its been a while, I have been away from home on a job for the last couple months. Here is my 280z as it wis with its new wheels and louvers. I also put in new lower rear control arms because I found that the driver side had soem crazy toe-in and the stock arms had no adjustment. It looks like I am going to be off of work for about a month so I am going to go on a roadtrip in this thing. Its definitely got some weakpoints but I will just see how far I get and what I can fix myself along the way.
  10. brapattack

    Pic's of your Z

    New wheels, tires and louvers mounted.
  11. brapattack

    New member with a new 240.

    Where in TX are you? I'm just getting fresh tires for my new Konig's now but who knows, may want the solids in the future.
  12. brapattack

    New member with a new 240.

    Cool solid face wheels! I was trying to find those in the 4 lug pattern for a while but they don't seem to be on the market anymore.
  13. brapattack

    [new title] 77 280z w/ l28et regeneration

    Okay, got the new TPS in and it really helped with the idle. Now the car doesn't turn off when rolling to a stop! The throttle response is still weird if you just stomp on the pedal. Just bogs to nothing until you let off and let it slowly rev up. Not sure if this is an AFM adjustment or what but at least its drivable. I ordered some of the Konig rewind wheels. I was trying to decide between 15 or 16" for a while but since i'm not going for a real performance oriented setup, I decided to go with 15" and will use a little taller tire to nicely fill the wheel well and provide a little more comfort. I figure these old suspensions weren't designed for the real short sidewalls that are popular on modern cars.
  14. brapattack

    [new title] 77 280z w/ l28et regeneration

    Hey Cgraves, thanks, I think they are the same unit but the turbo only uses two wires rather than 3. If i hadn't already bought the ebay one id throw you some $$ for yours! Slowpoke, I still have the BOV, was going to remove it but wasn't sure what to plug it with yet. Looks like a big hole, any idea what the threads are?
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