ECMlink Link is showing 18v

[99dsmer4g63]

After 2 years I finally got around to finishing and starting my car. Started rough as I expected. Air fuel was off and it didn’t want to restart very well.

Figured my injectors needed to be cleaned which I still plan to do however after doing some basic checks I noticed link showed 18.3 volts. I immediately shut it down and grabbed my meter.

The battery is in the trunk and shows 14.2. The turbo timer shows 14.4. So it seems the car is running voltages as it should be but link is saying otherwise.

What I find really weird is the laptop still shows high 17’s low 18’s while just the key is in the on position and capturing with the engine off.

Figured I should mention I have the generator g terminal clipped at the 4 wire alt plug to leave the ecu floating forcing the alternator into “high” voltage mode. Or something extremely close to what I said it’s been awhile since I did it.

I found this thread

2G - Low voltage in ECMLink but perfect at alt and batt???

So I'm struggling to figure out this issue and can't quite find a thread that describes exactly whats going on with mine. I got my new motor built and dropped in. Now on first startup it was running weird and rough(very rich 10.4) so I checked on ECMLink. In link it was showing 6.4v for the...

www.dsmtuners.com

where @steve mentions about checking pin 38. The meter shows battery voltage when the key is off and with key on it drops zero when the mpi relay turns on.

I can post a picture of the ecu board if wanted. Any thread I’ve found all pointed to the ecu being the culprit. Ecm tuning installed the chip about 4 years ago and “checked” the ecu at that time.

Thinking early next week I’ll be sending it out to them. Even if they tell me it’s completely fine at least I know my problem is elsewhere I suppose.


Thanks

-Daniel

 

[99dsmer4g63]

Here is a picture of the board. You can see where I believe ecm replaced C203. The board seems to have like a dried up silicone flaking here and there.

I checked voltage at the ecu and it shows battery voltage. I have yet to actually find any voltage or ground issue within the wiring.

Everything I’ve come across is pointing at the ecu.

Looking for some confirmation before I ship it out Monday.

Thanks, Daniel

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[jed344]

I would say ecu. Hard to always tell in pics and i have not looked at the board on one in few months but i think i see some caps leaking.

 

[99dsmer4g63]

@jed344 Figured I would follow this up. I sent the ecu out to Ecm tuning I procrastinated because I didn’t want to ship it near Christmas.

Got an email shortly after they received it saying that there was an issue on the board and that they should have reinforced that connection when they had the board 3 years prior when they previously fixed the caps, injector driver and installing the chip.

So after sending the ecu out I now have received it back in 3 days with the issue fixed and a full refund from ecm tuning minus the $15 to ship it to them.

I think this shows that ecm tuning is solid place to do business with. They could have easily kept my money and not said a word and I wouldn’t have known the difference.

-Daniel

 

[1cleangsx]

I remember years ago not long after buying my 90 gsx I was getting a lot of crazy phantom knock counts in ecmlink, sent the ecu off to ecmtuning and they said the issue was from a bad solder from when they had serviced it previously, possibly when the prior owner sent it in for the eprom conversion, but either way they fixed it for free, they really are great people to do business with and I’m greatfull for what they created for these old ecu’s

 

[jed344]

@jed344 Figured I would follow this up. I sent the ecu out to Ecm tuning I procrastinated because I didn’t want to ship it near Christmas.

Got an email shortly after they received it saying that there was an issue on the board and that they should have reinforced that connection when they had the board 3 years prior when they previously fixed the caps, injector driver and installing the chip.

So after sending the ecu out I now have received it back in 3 days with the issue fixed and a full refund from ecm tuning minus the $15 to ship it to them.

I think this shows that ecm tuning is solid place to do business with. They could have easily kept my money and not said a word and I wouldn’t have known the difference.

-Daniel

I have been doing businesses with ecm link sense mid 2000's and they have always treated me great. Glad to hear its now fixed. Last year i had a issue come up with a local car i tune that did something very strange. I sent the log to other good tuners and no one had a answer. We then sent the log to tom and he was able to explain why and how and it was essentially a fluke. He 100% did not need to even go that far with it to try to help but did. This issuse was crazy, essentially ecu turned on and off for a split second mid pull. This is seen in the logged data. He said hes only ever seen this a few times and it can happen when ob2 plug is bit loose. The car acted like it hit a fuel cut for split second. He was right nothing changed and it never did it again.