Bogging Question??!! Help needed...
 

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!

Definitely not normal. I would uninstall any mods and see if it still bogs.

^ What he said. Or you can try resetting your ECU and see if the bogging still exist.

Does it still bog after the car warms up to normal operating temperature?

yeah its very odd...I didn't notice any bogging last night (from what I can tell) but this morning it like starts then theres slight hesitation?

Sounds like when I had my AIRAID intake. Got any intake mods?

just drop in filter :(

How come it says uni chip in your mods?

I find when I first start it up and it's cold it likes a little more gas to get going without bogging a bit but with a little more gas it seems happy and fine. Once it's warmed up it feels normal. Even with a bit more gas is it still a problem? Perhaps raising the revs a little higher when letting out the clutch could help too. (Assuming you're not already launching at 3k rpm or something)

I have the unichip but I wouldn't classify that as intake mod :(

I have a auto :(

Sorry, my bad. Wasn't paying attention to see that. Hmmm... I'm not sure. If I think of anything I'll come back and let you know but there are likely much more knowledgeable people than I that can chime in.

Maybe a battery reset... I need to get the right size wrench tho hard to unscrew it. Of course iono what the battery reset would really do?

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 :(.

Are you serious? or are you trolling me?

i'd contact unichip.

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

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

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

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.

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.

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.

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

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.

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.

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! :thumbsup:

Could it be bad gas? did you recently fill up or go to a different gas station?

No, always go to the same place....but you never know.

Either way, even if it's a problem with his stock setup, he's going to have to disconnect the aftermarket tune since the dealer will have to be the next step (assuming the bog comes back).

Whenever I encounter a problem with one of my cars, the first thing I logically do is to identify the last change I made. If it's an aftermarket item and reasonably related to the problem at hand, then that's what I have to rule out first. It's just a process of elimination that I can do before succumbing to going to the dealer.

One other thought - if the bog comes back, and Unichip allows a mechanism for you to datalog the car and send it back to the tuner for review, you should do that as the tuner should be able to identify what the issue is and if it's something that can be tweaked in the tune.

You don't have to tell me...I basically said exactly the same thing on page 1. :iono:

If the car is still cold and you have the front window defrost on (runs the AC compressor) then it could easily be bogging a tiny bit from dead stops. Really cold air is also a lot more dense and it could be running too rich.

If you're not doing anything differently (ie driving the same, heat/defrost on the same, etc) every day then I would put money on the tune running too rich with really cold IAT's.

For the record, I was never blaming the tune I was simply saying you need to rule it out because it COULD very easily cause issues especially under varying conditions. For that matter so could an intake, a bad sensor etc etc.

Process of elimination is your friend when you don't have any trouble codes to start with.

Thank you all for the support so far...I had slight hesitation one time this morning...but that was all. When weather gets better, I will try the chip. I talked to jack a few days ago and the customer service was great. I would imagine that their tunes are built with all weather elements in mind.

Another note, I will be refueling the car soon... when near empty when the time comes...will try another place. Cant hurt.