Bogging Question??!! Help needed...

[ScionFrsFan]

Originally Posted by Apoc

You have a unichip installed and it's attached to your ECU. A battery reset will reset your ECU. I would take off the unichip also and see if the bogging goes away.

Dammit...I really didn't want to take it off lol. I was hoping that someone would tell me its bc of the weather and tires .

[Apoc]

Are you serious? or are you trolling me?

[xjohnx]

i'd contact unichip.

[ScionFrsFan]

Originally Posted by Apoc

Are you serious? or are you trolling me?

lol it was a joke. But, of course I wish it was a easy fine on what was wrong.

[ScionFrsFan]

But heres the thing....like I said how can one day be worst then another. -_-

[naikaidriver]

I have noticed something similar on especially cold mornings but only until the car has warmed up a bit. I only have a K&N drop in filter and no other mods.

If I were to venture an opinion based on what I have seen it seems to have something to do with the car compensating for the extremely low intake temps and denser air charge. Seems pretty normal to me. Anyone who has owned a car with a carburetor and choke knows what I am talking about.

I wouldn't worry about it unless it was doing this under normal operating temps. When my car is cold, I ease into the throttle as opposed to stabbing it. It helps.

Scott

[industrial]

Originally Posted by ScionFrsFan

Hey guys,

When taking off from a stop the car seems to start and then bog...

Now the traction control light isn't kicking on, but I'm wondering if the cold streets and winter tires sometimes don't always mix well?

Some days are worst then others?? That's the part I don't understand or know where it's coming from. First rear wheel drive car and first car with snow tires...

Is This normal

Thanks guys!

My car did this with an intake (airraid). I removed the intake and the car still did it. I took the car in to the dealership and they flashed the ecu and I didn't have a problem with it after that.

It seemed to only happen when I had the AC on, taking off from a slow idle. Here are some basic troubleshooting steps you can take:

1. Try removing the unichip and see if it still happens. If it goes away, try asking about this in the unichip thread or contact Jack.
2. Try removing the intake and see if it still happens. If it goes away, throw that filter away?
3. If it's still happening when your car is stock, take it to the dealer and have them look at it. You might just need the newest dealer flash.

[cruzinbill]

Originally Posted by ScionFrsFan

But heres the thing....like I said how can one day be worst then another. -_-

A shitty tune that isnt optimized for a large range of driving conditions would easily do that. Just get with unichip, its more that likely the problem.

[ScionFrsFan]

Reset the battery not seeing any problems right now...hope it was an odd fluke. I think the unichip is a great product and I don't think it was the cause of any of this.

[Foobar]

Originally Posted by ScionFrsFan

Reset the battery not seeing any problems right now...hope it was an odd fluke. I think the unichip is a great product and I don't think it was the cause of any of this.

Well I can tell you one thing, it's not the weather/tires that are causing that.

Likely culprits include something in the intake, something messing with your MAF, ECU mapping not optimal, or a fuel problem.

If you don't see any problems coming back by this weekend, it was probably just something weird with the ECU. If it comes back, I'd start by putting your stock filter back in place, then bypass the ECU Tune next. If it still bogs completely stock, time for a dealer visit.

As for Unichip, I'm sure it's a fine product, but even fine ECU tuning products can end up causing the scenario you're seeing. Nothing a good tuner can't fix, of course.

[cruzinbill]

Originally Posted by Foobar

Well I can tell you one thing, it's not the weather/tires that are causing that.

Likely culprits include something in the intake, something messing with your MAF, ECU mapping not optimal, or a fuel problem.

If you don't see any problems coming back by this weekend, it was probably just something weird with the ECU. If it comes back, I'd start by putting your stock filter back in place, then bypass the ECU Tune next. If it still bogs completely stock, time for a dealer visit.

As for Unichip, I'm sure it's a fine product, but even fine ECU tuning products can end up causing the scenario you're seeing. Nothing a good tuner can't fix, of course.

Exactly its only as good of a product as the tune supplied.

[mad_sb]

Originally Posted by ScionFrsFan

But heres the thing....like I said how can one day be worst then another. -_-

because tuning...

Considering, maf, baro, iat, ect, rpm o2 feedback etc all come into play when determing fuel, ignition timing, cam timing, throttle opening angle etc.... it is very easy for an "incomplete" tune to perform fine under certain conditions but like poop under others.

Could also be a flaky sensor or vacuum leak etc but I if you don't have any CEL's I would lean towards the tune until you rule it out.

If an ecu reset make it better for a while then you can bet the issue is long term fuel trim drift.

[industrial]

I think you guys might be jumping the gun to blame the aftermarket tune. Lots of people got the exact same problem on a completely stock car.

[ScionFrsFan]

Time will tell. This car has had a lot of hiccups...for most of us. Could of just been a fluke.

Thank you all tho for the support!