Anyone else with ECUTEK having fuel trim issues.
 

I am having issues with fuel trims.
long term goes full negative and short term goes full positive.

I have been told its a glitch with ecutek causing it to happen to my car. They instructed me to try reloading my tune a few times and to this point I have had no luck in resolving the issues.

anyone else had or seen this issue?

Is it just a logging issue perhaps rather than a ROM problem? What's your cal ID, RaceROM version etc? I've not logged mine recently so can't confirm.

Have you shot ECUtek or your Master Tuner an email?

If it's only done it since an update to ProECU then maybe try rolling back to the last known version. It's in the ECUtek directory on your laptop.

define full positive and full negative

post a log

can't help you without adequate info

damn man, i guess your user name really is fitting. Is this the reason why your car hasn't been running correctly? Saw your posts in the JDL thread, just wondering if its all related or if the BOV spring helped correct issues (or its been this the whole time).

I'm very surprised that this wasn't picked up on a data log that i'm sure you had sent to Bill.

We have seen this issue in a couple cars over the past two years. What we will notice is the long term fuel trims will max out (-35%) and because of that the short term fuel trims will then try to max out in the opposite direction because it is too lean (+25%).

Problem is we have shut off all long term fuel trims and it should not be correcting for long term at all yet the ECU still corrects.

Now we did experience one car with this exact same issue and they had after market HID's (made in China). The aftermarket ballasts were only sealed in plastic, not metal like they should be. Well these ballasts give off a lot of RF signals (plastic does not protect against that) and therefore interrupt the signals to the ECU, especially on the CAN lines.

When this was removed it fixed the problem in that one car. Do you have any electronics aftermarket parts in the vehicle?

Cheers,
William Knose
Delicious Tuning

As we discussed previously I have no aftermarket parts in my car other than suspension, clutch and motor mods. I only have a manual boost gauge. For now.

Necro'd thread post - I'm having a similar issue, but with an edelbrock supercharger on. :(

Here's a quick log:

https://datazap.me/u/bokehmon/log-16...&data=31-34-35

not too bad but it needs a fix to not let fuel trims fight each other

Set closed loop target to 14.7 and ltft will go disabled

I think it might be the maf scaling is not good

when it goes open loop the target AFR is way leaner then measured ( and only scaled to 11 afr max rich. ( and it just maxes out sensor) the target seems way lean for boost as well assuming it petrol. I say they tuned it on tailpipe wideband.

also the manifold pressure is weird maxes at 1.17 bar so only reading to 0.17 bar boost strange, i thought it was relative but looks absolute.

that looks unusual fuel trims high. Target afr vs actual afr way different in open loop and manifold pressure maxing out at 0.17 bar boost .

With throttle / going into boost, it's hitting a high of 1.17 bar - most of the log is pretty much just cruise to get open loop, found a .93 bar~ in the log here:

https://datazap.me/u/bokehmon/log-16...zoom=5525-5850

Is that an abnormal manifold pressure for an edelbrock supercharger with stock everything?

Thanks for the help! I'm pretty new to this stuff, so anything to help me read it correctly is much appreciated!

manifold pressure at idle does seem low


does it read 1 bar with ignition on but motor stopped ?


messaged you