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Old 05-10-2016, 04:27 PM   #11
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Quote:
Originally Posted by Slo86GT View Post
Definitely NOT driver issue. Mine's been doing it since new and still does somewhat with the tune! The car has a Torque Ratio Command algorithm that keeps itself from being beat on by slowly opening the throttle plate when it triggers. Datalogs agree. I've reported this to Tom and he made some headway in a fix, but it's not all gone.

Try turning off traction control and see if it gets better. Also, try a tank of 93 octane. That seems to help keep the car in power better as well, or at least mine. You will still have that big lag where the throttle opens more slowly than usual, and it's infuriating when you want to go, so you grab a gear. It's almost like HUGE turbo lag.

Here's the Datalog capture. The BLUE plateau'ed lines are the Accel Pedal Position, the GREEN curves are what the ECU is telling the Throttle Plate to do, and as the lines are on top of one another, the TB is working exactly as the ECu is telling it to. Yes, that's 2.5 seconds of LAG in throttle position in the second floor'ed plateau. I HAAAAATE it.


You are not alone mine also LAG on random occasion
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Old 05-10-2016, 07:50 PM   #12
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did you check to make sure your intake was not damaged. I've read in the past that people have had issues with the K&N intakes and them causing problems. Might check to make sure your MAF sensor is good and the intake is hooked up right.
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Old 05-10-2016, 11:42 PM   #13
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did you check to make sure your intake was not damaged. I've read in the past that people have had issues with the K&N intakes and them causing problems. Might check to make sure your MAF sensor is good and the intake is hooked up right.
Interesting... I have this issue too sometimes and the previous owner installed a K&N filter in it. It's just a drop-in, so is that different than what you're talking about?
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Old 05-11-2016, 08:27 AM   #14
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Thanks everyone with the information, I will turn off the traction control and see if that helps.
As for the K/N intake, I thought it might be the problem, so I replaced it with a completely stock intake and filter, but all that did is make the car run more quiet.
I have no CEL's and no warnings on the ODB.
Yes, it is like a very bad turbo lag, Hit the gas and it hints at taking off, falls flat on its face, then goes. Gives you a very unsettling feeling when crossing traffic or wanting to merge into moving traffic, Will it go or will it hesitate (Not a confident feeling)
Thanks everyone for your help i was really hoping for a quick fix. but it sounds like it's in the ECM/ECU programing and not just a pull and replace part.
Did a tune help at all??
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Old 05-11-2016, 02:26 PM   #15
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Can confirm, has happened to me 3 times in the past year. Cruising @ 55 ish in 5th gear and for a split second just loses power. Almost feels as if I've lost all traction for that split second. Good times.
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Old 05-11-2016, 02:45 PM   #16
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I am having that same lag on occasion as well as minor surge/ miss occasionally. I ordered a Green filter and was hoping the Snorkel removal and filter would fix it all. My 2013 SE warranty runs out this July. Will it do me any good to take it to the Dealer before it runs out and before doing the intake mods?
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Old 05-11-2016, 03:17 PM   #17
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Quote:
Originally Posted by Lavacon View Post
Can confirm, has happened to me 3 times in the past year. Cruising @ 55 ish in 5th gear and for a split second just loses power. Almost feels as if I've lost all traction for that split second. Good times.
This problem only happen when requesting WOT and car don't follow your command, yours I feel it's different... If your car loose power on a steady pedal input it's entirely another story.
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Old 05-12-2016, 08:28 AM   #18
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I mostly have the problem just pulling out of a light or stop sign, sometimes just trying to ease into the throttle it will dip and then go. I find myself slightly riding the clutch and feathering the gas on start up now preparing for the hesitation.

It doesnt happen every time. I may go quite a few stop and go's before it happens. Then just as im getting comfortable with it, it remindes me.

Mine happens sometimes when at WOT shifting between gears (usually 1st to 2nd and 2nd to 3rd), but I don't run it that hard that often, just passing or merging.

I tried driving it with the TC off and it made no changes and I currently have 87 Shell in the tank and I still have 1/2 a tank so I haven't tried running the higher grade gas yet.

Is this something that might be cured with an SCT tune??

Thank you all for your input I really appreciate the help..
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Old 05-12-2016, 09:27 AM   #19
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Try this

Turn key on. Wait for dash warning lights to go out. depress the gas slowly till it hits bottom, then release it slowly. Turn key off and start the car.


Or


Disconnect battery. Drain capacitors by hitting brake or head lights or touch the + cable to a - ground source. This will clear any learned patterns in the computer. Reconnect battery. And follow this by MPT

Follow these steps to complete an Idle Relearn:
With vehicle at a complete stop, set the parking brake.
Put gearshift in "P" (Park), turn off all accessories.
Run the engine until it reaches normal operating temperature.
Allow engine to idle for at least one minute.
Turn the air conditioning on and allow the engine to idle for at least one minute.
Release the parking break. With your foot on the brake pedal and the A/C still on, put the vehicle in "D" (Drive) and allow the engine to idle for at least one minute.
Drive the vehicle to complete the relearning process. Just make sure you drive easy for the first 30 miles, so the PCM can re-learn and adapt to your driving style.
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Old 05-12-2016, 12:55 PM   #20
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Quote:
Originally Posted by Sledge42hammer View Post
Try this

Turn key on. Wait for dash warning lights to go out. depress the gas slowly till it hits bottom, then release it slowly. Turn key off and start the car.


Or


Disconnect battery. Drain capacitors by hitting brake or head lights or touch the + cable to a - ground source. This will clear any learned patterns in the computer. Reconnect battery. And follow this by MPT

Follow these steps to complete an Idle Relearn:
With vehicle at a complete stop, set the parking brake.
Put gearshift in "P" (Park), turn off all accessories.
Run the engine until it reaches normal operating temperature.
Allow engine to idle for at least one minute.
Turn the air conditioning on and allow the engine to idle for at least one minute.
Release the parking break. With your foot on the brake pedal and the A/C still on, put the vehicle in "D" (Drive) and allow the engine to idle for at least one minute.
Drive the vehicle to complete the relearning process. Just make sure you drive easy for the first 30 miles, so the PCM can re-learn and adapt to your driving style.

Cool! Will these same steps work with a stick and keyless ignition?
Do I still put it in gear and just hold down the clutch and let it Idle for a minute?
I do know the idle does change just by pressing in the clutch.
thank you for the help
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