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ECMlink (RESOLVED) No start after LC1 WB install (DSMlink)

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Kdouglas89

Proven Member
436
11
Jul 8, 2013
Davenport, Iowa
95 TSI AWD - Car started and idled for about 30s before just dying. NOTE: I noticed my tachometer was not working and idle was pretty high, but I assumed it was due to the weather (Was about 20f out). Car would not start afterwards. I noticed this morning that I installed the WB incorrectly and accidently attached pin 76 to the harness wire as well, instead of tying it off. I untied harness from pin 76 splice but still a nogo. Gauge is calibrated, and LC1 cycled from .20 to .80 in link a few times when I was trying to turn it over. White wire is grounded to pin 92 correctly.

ECU had been inspected by ecmlink prior to install, and I just inspected it again. Nothing looks much different. Any help would be great.
 
Solution
***UPDATE*** In case anyone running into the same issues. I, for some reason, thought I bought a 97 ECU and had DSMLink socketed in it. It is a 95 ECU!

I had the wires in the wrong order "3214". When I switched to "4123" it fired right up. I'm an idiot :banghead:
Post a log of activity.
Here is the log. I have not had much time to set what I want logged, so unsure how much this will help. The throttle up and down is me trying to get it going as it's cranking. I appreciate any leads you may have.

Edit: I had to add almost everything to the displayed values just now. Unsure if you will have to or not.
 

Attachments

  • log.2021.11.18-01.elg
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Did you change any other settings besides the wideband pin assignment? Was it running fine prior? Did you change any other parts on the car? Doesn't appear to have a blown sensor ground and ECU shows rpm. However I only see injector duty for a couple very brief periods during start attempt. Is the fuel pump running for sure? Is it sparking? Are the injectors firing at any point? Have you tried to start with brake cleaner or carb cleaner? Running SD you can just take the coupler off at the TB and give it a squirt and see if it runs. Also since its the last thing you did, double check wiring is correct according to the ecmlink wiki.
 
The only thing else I did was put on a bigger turbo and delete the coolant lines. (16g). Turbo is in good shape, so not concerned with that. I installed some 1200s and dsmlink at the same time last month, but I was able to leave it idling and do a base tune. Could I have blown any kind of fuse or sensor by having pin 76 harness tied in with the WB? It idled for about 30s before instantly dying. Have been reading about ECU sensor grounds getting blown. I examined it, and it appears fine.

Side note : When I was wiring at pin 76, I noticed the wire was already spliced and nothing connected to the harness "Like someone previous had a WB connected and just snipped the wire without re-attaching it." Car ran and drove, just very rough. Assumed it was a bad boost leak.
 
I think your wideband is working fine at least it's reading full lean and full rich (0v and 5v). But did you connect an IAT sensor for SD? If not, you have to set to ignore the IAT signal input and maybe that's the issue.
 
I think your wideband is working fine at least it's reading full lean and full rich (0v and 5v). But did you connect an IAT sensor for SD? If not, you have to set to ignore the IAT signal input and maybe that's the issue.
Yes, I bought the SD kit / cable from ecmlink. Had the bung welded to my IC piping by my throttle body at 45deg angle.

I had SD working before I did the WB install / turbo swap, so I am pretty confident that shouldn’t be an issue. Ecu numbers arnt reading crazy numbers, so I think Ecu should be fine. Just an annoying issue to deal with.
 
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Looking at the logs, and comparing it to other peoples healthy logs, my fuel activity is pretty similar at keyon and startup. I am running brand new ngk plugs and brand new accell plug wires, so I wouldn't think that would be an issue.

Is there something common on 2gs that would be affecting spark besides plugs and wires that I can look into? Gonna be testing my coil packs asap.

Thanks!
 

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  • log.2021.11.18-01.elg
    14.7 KB · Views: 24
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Yes, I bought the SD kit / cable from ecmlink. Had the bung welded to my IC piping by my throttle body at 45deg angle.

I had SD working before I did the WB install / turbo swap, so I am pretty confident that shouldn’t be an issue. Ecu numbers arnt reading crazy numbers, so I think Ecu should be fine. Just an annoying issue to deal with.
OK but you have to assign the IAT sensor in ECMLink to make ECU to recognize the IAT sensor signal.
 
OK but you have to assign the IAT sensor in ECMLink to make ECU to recognize the IAT sensor signal

OK but you have to assign the IAT sensor in ECMLink to make ECU to recognize the IAT sensor signal.
From what I understood, assigning the IAT is just for logging purposes correct? I'm not seeing a pin assignment for IAT ECU side, unless I'm blind.
 
Can you verify that it’s pinned to 76?
Ye it is, just went out and looked and triple checked. If it's cycling from min to max volts in dsmlink, would that verify it's atleast working? After I calibrated, i held a lighter to the sensor and it went from 22, to 9-10 until I pulled lighter away, then it went back to 22
 
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Would this make a difference in my car starting or not? From what I've read, this is just for logging purposes (PC Side) and (ECU Side). I should be logging IAT's, but I'm not worried it at the moment as my car doesn't start LOL
 
Would this make a difference in my car starting or not? From what I've read, this is just for logging purposes (PC Side) and (ECU Side). I should be logging IAT's, but I'm not worried it at the moment as my car doesn't start LOL

No it would not. I just checked the log and i don't see the map sensor listed under display items.I bad map sensor would cause i no start though.
 
Setup your IAT as previously mentioned. Capture your map and iat. Fix your tps so that it's showing 0.63v at rest. Simulate idle switch operation from TPS. Give new log.
 
Setup your IAT as previously mentioned. Capture your map and iat. Fix your tps so that it's showing 0.63v at rest. Simulate idle switch operation from TPS. Give new log.
Thanks a ton for the help, log is posted. It feels and sounds like it wants to start, but it's just not getting there :confused:
 

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  • log.2021.11.19-02.elg
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Would this make a difference in my car starting or not? From what I've read, this is just for logging purposes (PC Side) and (ECU Side). I should be logging IAT's, but I'm not worried it at the moment as my car doesn't start LOL
How would the ECU and you be able to know what sensor/which signal you are having without assigning?
 
You need to log omni 4 bar. I'm only seeing MDP
I'm sorry, I thought it was the same thing. Log posted. Cranking log didn't save and am unable to go back out to do it until tomorrow. From what I saw the MAP went from -0.1 to around 0.5 or so, not much movement.
 

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  • log.2021.11.19-03.elg
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