brifriinc

well.... When I'm drivin, i'm accelerating, and usually in 3 gear but lately in 2nd gear, the car would just like, hiccup. Just jerk, but then keep accelerating. I'm guessing its the spark plugs.... but that doesn't make any sense. Brand new car, shouldn't they be gaped right? and If I were to regap them, what would I gap'em at? The last 2 days its done it 3 times... but I guarantee that when I take it to the dealer, its not ganna do anything with them in the car....just makes me mad. Does anybody else have this? and any suggestions?

GeoChevyCobalt

Were is the gas gage at when you try this. I have had this happen once to me when low fuel. I was also doing some hard cornering.

urbanmonkeygod04

In the Redline, I'll have it take a little dump on me at 5500 rpms in 2nd gear, just a little burp, and then keep going like nothing happened . . . rarely does it, just once in a blue moon . . . but it kinda wierds me out . . .

MarcS

Happened to me once a few weeks ago, has not happened since.

RedCobaltSS06

Any of you guys consider taking it to a dealership? if mine "hiccups" its going to the shop... its a free fix under warranty.

brifriinc

well the gas gauge was at half tank... so its not the gas.... but yea I want to take it in but, right now don't have time.... not until like friday... but i just figured i'd get your guys imput.... it started like it only did it once then... a couple thousand miles later did it again. and I just don't want it to get worse... i mean 3 times in two days... kinda makes me mad... i have almost 5k miles on it...

Ljavy17

Hey man It just happaned to mines. I have half a tank also. It hiccuped at like 4000rpm i believe.

bigjoe25

mine has done it several times i have taken it in twice(different dealers) for it know and both times thay said i was because i hit the rev limiter i tried to tell them that i dident but they know best so i guess i will just fix it my self

spooler

see, stuff like that freaks me out, I havent been graced with the hiccup of death, but I just dont want it to happen, i'd end up at the dealership with them not believeing me or something.

turboeco

iTrader: (1)

I thought it might have been because I have the Psi-Fi kit, but I guess not.

WOT in third gear, every once in awhile I'll get the hiccup at 5k rpm.

Glad to hear its not just me.

brifriinc

glad to see its not just me either... but i just wish it didn't do it.... oh well. at least its not an everytime thing.

Wolfman

I dont know, if you shift alittle wrong, it might just kinda jerk afterward, but that hardley ever happens.

SilverSS/SC

My car used to have this problem exactly . Evenly light throttle accelerating in 2nd usually , I got what seems to be miss for a second , then it kept on going like normal . I have no clue what it was because I didnt do anything to fix and my car doesnt do it anymore and hasnt for a month or so . It did it up to about 5K or so miles I have 8900 miles now and its running better than ever hiccup free .

brifriinc

no its while accelerating. ill accelerate from 2nd gear 2500 rpms.... and hit about 4500 and just hiccup... dunno its just weird...

duronsti2k5

goddamn these cars are soooo gay.

OneLunG

warranty repair = t3h suck, let it blow warranty unit = t3h win...

Zonomar

This happens to me when engine cold - first thing in the morning.

Only does it once - and doesn't if I accelerate slowly.

CobaltHarv

I was reading the book on the 2.0 SC Ecotec and it suggests that premium octane fuel is suggested, but it is not required.
The occasional 'hiccup' as you guys are calling it was happening to me too, i was wondering if it was water in my exhaust pipe so i made sure i warmed it up really well and still was having the hiccup at about 3500-4000.
Anyways it wasn't water in the exhaust because the other day i bit the bullet and put the good stuff in (but i got a gas card with my purchase and so save 20 cents per litre, the 91 octane worked out to 1.07 per litre).
With this premium fuel I not only have lost the hiccup but my highway fuel economy has gone up a few hundred mils per 100kms. it just runs better on this better fuel.

Cheers

flobeelicious

mine always had a hiccup in second and third gear, it'd chug for a second or two under light throttle between about 2500-3500. i always guessed it was something with the bypass valve, as my gauge was right around 0 when it would hesitate. get to take mine in tuesday because the tach no longer works, so if they figure out what the hiccup is, i'll spread the word.

CobaltHarv

Would you call this 'hiccup' a hesitation?

These engines are double-balanced because of the physics behind the inline-4. The old quad-4 was not and had longetivity issues. There was a flat spot in those supposedly as well. Similar to a motorbike or other 2 stroke that has a flat spot, or that just doesn't get going really fast until higher RPM, I think this engine has a spot in it that it's moving from balancing itself and relying on one or both of the balancers to keep it moving perfectly. It's a feature, if undocumented, and likely nothing else.

As I said above it's definately less noticeable when it has been warmed up and you're not using premium fuel (as opposed to gas syphoned from duronsti2k5's 1984 toyota rustbucket)