closed loop headache....

[dneilmotorsports]

To Hondata.. I having a prob to tune a closed loop operation for my car..i run a open loop with no prob at all before. But when i tried to switch to closed loop, my car was jerking too bad. I had tried to
setup at the parameter setting but prob still the same problem..Pls show me how ..thank you..

[Spunkster]

Start by using a different input, as the D14 input is only designed to handle 0-1 v it does not have the full voltage range that the ELD or other inputs have. See if that resolves the issue.

[dneilmotorsports]

I had changed the input to EGRL D12..So, should i change the conversion table at the analog 1 to make it the AFR match with MTX-l..

[Spunkster]

yes, it is the same as a voltage offset.

[Jan Niemi]

Interesting. I'm having the same problem. My car runs awesome in open loop and I've gotten as high as 38 mpg on this calibration in open loop. I put in a new O2 a couple of days ago and the car leaned out to the point of stalling and jerked when I tried to drive it. I put it back in open loop for now until I can figure out what's wrong with the tune.

[SilverRD1]

Start by using a different input, as the D14 input is only designed to handle 0-1 v it does not have the full voltage range that the ELD or other inputs have. See if that resolves the issue.

i have mine wired to d14 and it shows it ranging from 0-5v in smanager during datalog. are you sure thats true?

[Luke]

spunksters word are the third information, I got about D14.

there are words saying, the O2 input is capable of reading 0-5V, others say it's 0-3.8V and now it's only 0-1V?

for my part I can say: I'm using an Innvoate LM2 Wideband, connected via the "tuner harness" to the ECU and programmed to a 0-5V range. AFR 14.7 is at 2.54V, so stoich is measurable, whether it's a 3.8V or 5V range.

since everything above 2.54V/14.7 AFR isn't so good for the engine, so that should be ok ^^

is there a documentation and some facts about that??

best regards Lukas

[joeb]

In all honesty i just turn off closed loop . I can never get it to work correctly as it is finicky . All the cars i tune with Hondata i leave in open loop and they all run great with excellent fuel economy . Just tune with a wideband in the car and it will be fine . The a/f ratio will change with drastic temp swings though .

[Jan Niemi]

I initially had a problem with switching to closed loop from a perfectly running open loop calibration. I ended up having to start from scratch using a stock calibration and by changing injector latency settings. You can search my posts to see how I got it to work. My car runs like factory right now in closed loop.