ECMlink 2G fresh start after rebuild and tries but fails. is this log helpful?

[Stapl3]

Coolant temp sensor and IAT have mad spikes in the second log and seem to be dance partners causing timing spikes along with it. I see the MAP spikes as well. Also, I know it's just along for the ride but the WB seems to be doing nothing. All this stuff should share a common ground at the ECU so I would check that.

 

[steve]

Hey Steve, MAP is logged as I can see it is and i made sure it was re selected and now does move thankfully but since its NOT an omni i may need to adjust to user defined or try a smaller version

the battery is a small pc680 so is fine but can get a tad weaker on starting but gives many good attempts at it.

as for the injectors do I need to adjust for this? I must admit this section is an unknown to me. I don't know how to read that part, I did adjust the coolant temp fuel adjust table but is there an ideal on this as if its over fueling then its going to cause a hard start i assume?

I saw the temp spikes and not sure on those as to the meaning. so that signal faulty sensors? i mean if they really went then damn even the OEM was brand spanking new! i find it hard to believe those two died sitting doing nothing. the ecu sensor was in the house in a bag where as the GM was in the bay in the pipe still. I would need to check an older log to see if they spikes back then but generally spiking on those two means what from your understanding?

I missed the 4B MAP in the list but I see it now. Look at the data from it. 43.3 psi @ 0 RPM, not likely. the only time it's in vacuum is the same time the other are also glitching. These also match up to the spikes in battery voltage.

I wouldn't worry about the injectors, that's a side effect of the airflow being so far out of whack from the MAP sensor but something you should be watching in a log and get a basic feeling as to what's normal.

To me it seems like you have a some sort of electrical issue, perhaps when you wired the MAP or the Fuel Pressure Sender but it looks like something is effecting some of the analog inputs.

 

[FIBA M - EC17PSE]

Coolant temp sensor and IAT have mad spikes in the second log and seem to be dance partners causing timing spikes along with it. I see the MAP spikes as well. Also, I know it's just along for the ride but the WB seems to be doing nothing. All this stuff should share a common ground at the ECU so I would check that.

The sensors im not sure on as to why its doing that. They were all really new. As for the ground the ecu is not bolted in currently but i read thats ok but prior to the engine rebuld it was all ok, no new wiring has been done since. So grounds should all be as they once were. I will re check engine bay grounds incase but i looked on the weekend to check i added the transmission one when i mounted it back to the block and the intake manifold one and those are there.

edit, the WB is not recalibrated currently so i do need to re do this. i shall make sure to try do this on the weekend

 

[Stapl3]

Are your aftermarket sensors grounded to the chassis or the ECU?

 

[FIBA M - EC17PSE]

I missed the 4B MAP in the list but I see it now. Look at the data from it. 43.3 psi @ 0 RPM, not likely. the only time it's in vacuum is the same time the other are also glitching. These also match up to the spikes in battery voltage.

I wouldn't worry about the injectors, that's a side effect of the airflow being so far out of whack from the MAP sensor but something you should be watching in a log and get a basic feeling as to what's normal.

To me it seems like you have a some sort of electrical issue, perhaps when you wired the MAP or the Fuel Pressure Sender but it looks like something is effecting some of the analog inputs.

On logging the injectors i have flow logged but whats the other one i need to log as i looked and only saw injon? Is this the one?

So wiring is has not changed from what i ran the car on the old engine. I did zero to that side of it. I will disconnect the maf/mal sensor harness and re seat it incase its corroded in the terminals possibly giving a bad reading but the fuel pressure was already wired up back before the engine spun. Nothing back then was a miss.

I also think its electrical/sensor like. It sounds like it is but i will do the mechanical checks also to rule them out. I know fuel, spark is there, pressure to as i see it and return is fine. So i will do the other checks to just rule them out along the way.

Are your aftermarket sensors grounded to the chassis or the ECU?

They are grounded to the factory wiring so should be to the ecu. My mdp is now my fuel pressure sensor, this is how i read this on here also to wire it in.

The rest is like so.

Baro is ecmtuning harness for the map
Intake temp is iat gm.

Those two are as ecmtuning specify to do and had been since installed.

As i mentioned to steve above im trying an unknown map sensor so i may need to select a user defined as its not an omni map and likely not a 4 bar either. Finding this is tricky but if its an issue in mal being off it might explain the non starts and trying to but never commiting

 

[FIBA M - EC17PSE]

Well today was a good day! 2 new sensors from the US of A and both now work!

The fuel pressure sensor works now thankfully and on the same wiring and settings so clearly was a bad sensor! So that's not loggable and shows 43psi so pretty spot on thankfully.

The MAP sensor is a Motorsport SS version and I opted for a 5 bar map this time to allow room to grow. HOWEVER, I have some math brain issues and while I DID get it to start using the AEM 5 bar map settings I am wondering if it needs tweeking?

I would love to work it out correctly to be spot on from my data sheet but I'm not great at the math and calculation of it but I did try for over an hour! I tried many sites and I got close and ended up with something that looks right but I then did not get to that again and no idea why or how hahahahaha.

Anyone care to explain this or show how to do it so my brain can work it out please. I will attach a pic of my data sheet with my MAP sensor to see the graph and settings.

I am just thankful it was the sensor as from the start it seemed electrical vs mechanical issue. I will upload a video also for you to hear it now shortly.

So good progression today and if someone wishes and does not mind the scaling of the map sensor I would be grateful for that assistance

Please see the first log I did with the engine running. While the WB is not recalibrated yet its purely just to see it start and idle and rev a bit without falling flat and dying so it holds it well.

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[FIBA M - EC17PSE]

Following on from the last post I now have the engine running and I idled the car to temp so i could clean the engine out and remove the oil and filter for fresh stuff.

I have to go through this log now myself to do small tweaks but i do see some items like idle adjust i need to work on since the new cams, small head work and compression is different things will alter slightly.

BEST THING NOW is the car starts real fast vs on the older stock engine so starting fuel is much better now! oil pressure is a good 60 psi on cold start and once the engines upto temp (coolant the pressure is about 18-20 psi with oil temps about half way on the gauge. (innovate mtxl gauge)so pressure seems good and even if it drops a little more its save enough as i dont wish to drop any less then 10-12 psi on hot idle if i can help it.

Thanks to you all for chipping in and for spotting my MAP sensor issue! truly saved me and getting this started finally.

if you spot anything in this long idle log I may miss let me know and i can check it out. I plan to reset the idle items to get those values all back in check and I plan to figure out how to slice into the oil pressure sensor to get this logging into link also and then its always visable so thats another thing im going to look into