Idle Issues
#1
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Idle Issues
So car runs pretty decent now. Idle hunts when the iac is plugged in. I dont understand it. It idles like a rock with the iac unplugged and the timing locked @ 10 degrees. I basically completely turned off any idle controls by zeroing out the tables and setting p to zero in the idle control logic, plug the iac back in and unlock the timing and it huts. IT SHOULDN'T DO THAT, if all idle controls are completely zeroed out. And for some reason, even with idle P at zero it still generates an idle learning value, which it also shouldn't do.
I do also think I may have a wiring issue, all of my sensors seem to have an odd 0.08ish volt noise to them, so I had to do things like soften the accel engagement to keep that from turning on. I'm using the factory NB sensor ground, however my knock sensor is also grounded there with a stacked ring terminal, yes I know thats bad and thats going to be the number 1 thing I check once I'm back to the car next weekend.
I do also think I may have a wiring issue, all of my sensors seem to have an odd 0.08ish volt noise to them, so I had to do things like soften the accel engagement to keep that from turning on. I'm using the factory NB sensor ground, however my knock sensor is also grounded there with a stacked ring terminal, yes I know thats bad and thats going to be the number 1 thing I check once I'm back to the car next weekend.
#2
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Well I've found two issues so far. The P value in AEM works backwards, zero is the max p value for control. AND apparently the iac speed should be around 2500um not 20.5, that could be causing some issues, maybe even my electrical noise.
#3
Hey Leafy, quick newb question :/
How did you wire up your iac was it through a gpio? and how did you come about on the setup Finally got my car up and running only to find out my car was idling at 3k rpm because my iac was not wired in and setup. Any help would be much appreciated once again. My tuner is asking me to finish this last little hickup before taking it in, I need to know the frequency in hz in order to get the idle motor tuned in. But must configure it in the software as the iac pin and then adjust the pulse width if im not mistaking?
How did you wire up your iac was it through a gpio? and how did you come about on the setup Finally got my car up and running only to find out my car was idling at 3k rpm because my iac was not wired in and setup. Any help would be much appreciated once again. My tuner is asking me to finish this last little hickup before taking it in, I need to know the frequency in hz in order to get the idle motor tuned in. But must configure it in the software as the iac pin and then adjust the pulse width if im not mistaking?
#4
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I got mine for trackspeed with their special boomslang made harness. Though I've had to manually track through pretty much every wire in order to have it do things that I wanted it to (like VICS and clutch switch), but I cant remember if its on a GPIO, the massive 700 page PDF for the ems4 should have that info somewhere in the very beginning.
I'll get my laptop out tomorrow night and check the setting I came up with for iac frequency (technically its iac period, ******* stupid AEM). I only have an NB iac number, and I know for a fact the NA is different.
I'll get my laptop out tomorrow night and check the setting I came up with for iac frequency (technically its iac period, ******* stupid AEM). I only have an NB iac number, and I know for a fact the NA is different.
#5
Hey Leafy, quick newb question :/
How did you wire up your iac was it through a gpio? and how did you come about on the setup Finally got my car up and running only to find out my car was idling at 3k rpm because my iac was not wired in and setup. Any help would be much appreciated once again. My tuner is asking me to finish this last little hickup before taking it in, I need to know the frequency in hz in order to get the idle motor tuned in. But must configure it in the software as the iac pin and then adjust the pulse width if im not mistaking?
How did you wire up your iac was it through a gpio? and how did you come about on the setup Finally got my car up and running only to find out my car was idling at 3k rpm because my iac was not wired in and setup. Any help would be much appreciated once again. My tuner is asking me to finish this last little hickup before taking it in, I need to know the frequency in hz in order to get the idle motor tuned in. But must configure it in the software as the iac pin and then adjust the pulse width if im not mistaking?
#8
I do also think I may have a wiring issue, all of my sensors seem to have an odd 0.08ish volt noise to them, so I had to do things like soften the accel engagement to keep that from turning on. I'm using the factory NB sensor ground, however my knock sensor is also grounded there with a stacked ring terminal, yes I know thats bad and thats going to be the number 1 thing I check once I'm back to the car next weekend.
EB Turbo
#9
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Its been sorted out for a while now. Once I figured out that the p-term was backwards, and it got better when I added the passenger side intake manifold ground strap.
My only idle issue now is that the engine instantly dies when the fans first turn on at idle. And that idle on hot start is lean for the first minute.
My only idle issue now is that the engine instantly dies when the fans first turn on at idle. And that idle on hot start is lean for the first minute.
#10
EB Turbo
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