L28et Y U No run good!?

[Skib]

So I just picked up a super clean 82 ZXt from the original owner.
It ran great all the way home on the freeway (~2 hours), but started to intermittently sputter, stall, puff black smoke, and wanted to die at anything under 2300RPM
 

At first it would just do it a bit and then go away, but then it did it and died and took a while to restart.

Gave the ECU a smack to see if there might be some bad/loose solder connection and it fired up again, ran perfect.

 

Then drove it from my buddies back to my house and it ran great all the way home until the very end up started acting up a little but went away.
 

Drive it this morning, make it about 8 miles and it dies at a stop and wont re start and have to have it towed back.

 

 

 

When the car is having its fit and not wanting to re start there's spark at the plug wire and from the coil wire, and if you crank enough you can start to smell fuel.
But when your cranking it just cranking no coughing or anything and then it will just start when it finally does.
So I really don't know whats causing it to run terribly intermittently and making it not want to re start.

 

When its not acting up it runs fantastic and boosts strong. Green light comes on for the ECU and the fuel pump comes on fine.

Nothings unplugged, it passed CA smog a few weeks ago even.

 

 

[Dolomite]

I don't know if translates to l series but my 2.3 tbird turbo motor did that shit, we tried many things before taking it to an electrical specialist. He fixed it right quick, there was grounding issues in the ignition and ecu wiring. It had spark but would run shitty and stall. Hopes it's something simple like that.

[Skib]

Yeah its deff an electrical issue. when its not bugging out randomly its runs flawlessly and boosts hard.

[bananahamuck]

Ours did something like this and kicking the ECU seemed to work (sometimes)  but come to find out (after replacing ecu)  it was the kicking of the ECU that was shaking that fuel pump control modulator up behind it,, as that big resistor inside it had come un-soldered . Still does weird shit sometimes but i think that is because we don't garage it enough ,, so it's damp all the time

 

I don't know though .

[Skib]

so far seems the aging battery was screwing with the ECU voltage.

 

tossed in a new one and so far no issue.

[Ranman72]

so far seems the aging battery was screwing with the ECU voltage.

 

tossed in a new one and so far no issue.

sometimes its the simple things 

hope it fixes it 

[Skib]

yeah havent had that issue, had a bit of a no restart issue after that was due to fuel soaked plugs 

and that was due to a CHTS fault, threw in a new one and no issue so far.

 

 

theres a little bit of cobwebs to dust off

[83turbo280zx]

The EFI connectors are notorious for getting moisture in them and having corrosion. Make sure all of your EFI connectors and your ECU connectors are clean, Use contact cleaner in a spray can and a little di-electric grease upon reassembly to prevent it from happening again. You can also download a FREE copy of the FSM from xenons130.com and component test the CHTS which is another common failure point, and will cause issues that you are having. You might have a friend unplug the CHTS while you've got it running and are inside the car holding the throttle to keep it idling, if it starts running better as in doing a hard pull in a parking lot, you may be onto something as far as a fuel starvation issue.

[Skib]

This was sorted about 2 months ago, the battery and temp sender sorted things.
been boosting nice and hard since.