ECMlink 11 sec car just dies randomly(log attached) Please help

[Jonnynitrous]

Please help!!!! This car ran flawless , its never let me down till this.

A quick story about the car.....I changed the cas,coils and ignitor trying to solve this issue. i'm thinking my last option is the ecu itself unless you guys see something else.

The car runs good and then it will just shut off, sometimes it happens right away and sometimes it will go a day. Every time it dies it will start back up and get me home which is weird....

 

[Macgyver'sDSM]

I would at least pull the ECU and check for any noticable issues. I can't view your log on my phone right now but fuel and voltage are the other two things that I would check. I had a fuel pump going bad and the car would just randomly die. I could always get it to start again tho. And check and clean your grounds. Do your lights flicker at all when it dies? If voltage is good grounding can still be a problem.

 

[Jonnynitrous]

The voltage looks good in the log but....it couldn't hurt to clean the grounds I also watched the fuel pressure when it was acting up and it seemed good. I didn't notice the lights flickering when it was dying but I can watch for that next time it does it.
Thanks for the response!!

 

[wrencher]

Your wideband is sure going ape shit too.
It seems to act up around the same time it dies ?
Also look at that log from 19 to 22 and 33 seconds on.....
Lock it in open loop and see if your symptoms go away.

Otherwise a possible wiring issue affecting the engine and wideband?

 

[AWD-Tony]

Could it be fuel pump. Check 36-39 seconds in the log. You're full throttle and injector duty dips to zero. I'd use link to activate pump and stream injdty. Don't know if that's the correct way.

 

[AWD-Tony]

I don’t think that’ll work since the injector won’t be opening with the car off.

 

[AWD-Tony]

If it’s rewired, check the relay.

 

[Jonnynitrous]

When the wideband is getting all crazy its missing and dying so it kinda makes sense but why is the afrest spiking like that? thats not normal. I'll lock it in open loop to give it a shot.

I watched the fuel pressure gauge when it acted up before, it stays at a consistent 50psi so i feel like that is good.....i have it rewired, i'll change the relay anyways to rule it out.

 

[AWD-Tony]

The injduty drops for a fraction of a second so it may not change the fuel pressure reading on the gauge. When it's happening, listen to the pump to see if you can hear it cut in and out. Another thing to check would be injector ballast.

https://www.dsmtuners.com/threads/injector-resistor-pack-test.382964/

 

[Jonnynitrous]

I found the problem! The ecu fried.