1976 280Z Restoration Project

[wheee!]

Who wants to bet a Timmies that I have an injector wiring issue? Remember my colour coding issue? I thought I had it right but then again, I had to rewire all the injectors when I swapped them out sooooo......

[wheee!]

Guess I owe everyone a Timmies.... no issue with the wiring. Running a bit better but still having problems.

[wheee!]

Spent an hour on the phone with Haltech support remoted in, running better but still off.

[gwri8]

14 minutes ago, wheee! said:

Guess I owe everyone a Timmies.... no issue with the wiring. Running a bit better but still having problems.

I don't know what a Timmies is...but I'll be watching my mailbox for one ?.

Glad to see you're back on your car.  Maybe you'll get a test drive in before the first snow?

 

[SteveJ]

13 minutes ago, gwri8 said:

I don't know what a Timmies is...but I'll be watching my mailbox for one ?.

Glad to see you're back on your car.  Maybe you'll get a test drive in before the first snow?

 

https://www.timhortons.com/

[Captain Obvious]

Isn't Haltech all hashed out? Are you doing something strange that they've never run into before?

[wheee!]

I’m thinking I might have a flaky injector or two. Getting signal but no fuel. I will check them all independently next. If it’s a bad cop, it’s harder to diagnose. Need spares.

[wheee!]

The engine runs but too rough to idle or start off zero throttle. I rebuilt the harness for both spark and fuel today so they are known good and are Delivering proper signal. Timing is locked at 10 degrees BTDC.

[wheee!]

I don’t think it’s as much a Haltech issue as a mechanical one. CAS seems to be working fine now.

[wheee!]

Well after another remote tuning sesion, I am not much further ahead. The CAS seemed to be syncing but was still not providing a consistent signal for the Haltech. We tried a few different settings including batch fire injection and wasted spark. That's where things got interesting... the COPs melted in seconds of loading the tune, even before starting the engine. ☹️ Basically as soon as we rebooted the ECU (as you have to after every ECU software change).

I don't think it was the tune as much as a glitch in the Haltech that caused the COPs to latch power. Only three melted. I believe it was cylinders 2, 4 & 6, but I might be wrong. I should have written that down before pulling them.

I am waiting for the arrival of some new COP's to reset the software and try again. I also moved the Home signal from one reluctor to the other (B pin to C pin) on the OneSix CAS to see if that helps signal fidelity. Tim (from OneSix) apparently recommends that we use Signal Ground from the Haltech versus Home and Trigger ground in the wiring, so that was done as well.

I opened the valve cover and inspected the cam to see if any of the keepers/lash pads had slid off, causing valve issues but alas, they were fine. So no easy "aha!" moment to be found there. I ordered a NOID light test kit as well, so I will confirm the injectors are firing as they are supposed to. I confirmed all the injectors a re working properly with a 9v battery test. Clicking away happily. The Individual spark was confirmed prior to the meltdown.

Hoping to have some good results soon with the new COPs. If not, I think I will have to consider trashing this CAS and rebuilding the engine setup to run a crank trigger. Not what I wanted to do....

[Zed Head]

Don't you have data acquisition files that show you everything that happened?  Injector opening, spark, trigger, throttle blade, etc.?

Usually you can pull up a segment of time from a run and see all of the inputs and outputs on one or two screens.  It's geeky computer nerd electronics stuff but there's information there.  

The L28 will run on three cylinders just fine.

https://www.haltech.com/downloads/software/

[wheee!]

The engine never ran during that meltdown. It all happened the instant the tune was rebooted in the ecu and the ignition was quickly shut off (Key ON position, turned to OFF). I have a copy of the tune on the laptop that I emailed to the tuner for his perusal. I expect that there was a glitch that happened suring the reboot and fried the COPs. I will reload a clean tune (that was cranking the engine without issue) before I plug COPs back in.