The problem started about 2 months ago when I would be under full throttle climbing threw the RPMs, as the RPMs reached roughly 5200-5500 my car would lose steam noticeably hard and begin to back fire and pop and bang all the way to redline. I put the stock DP in and disconnected my battery to get rid of the engine light which it did, went for a drive same thing happens everytime in the exact same place. Changed spark plugs, did a compression test, brought it to a buddy to check codes (none). So now it was GMs time since I was due for my power steering n charge piping recall anyways.

GM phoned me back and said they test drove it n went over everything and nothing came up as far as codes on their diagnostics. They then stated that it is a pre-mature rev limiter to protect the motor. I said oh ok, is their anyway to remove it...they said no (of course) they aren't aloud too. The car has 21,454kms on it I've had it for a year and 2months (baby her like crazy) and this is what I get...a super invassive rev limiter 1,000-1,500RPMs from the actual rev limiter which only occurred 2 months ago, when I initially got the car it pulled super hard all the way.

Does anyone else have this problem, is GM serious? The car is not as enjoyable to drive now...

 

Total and complete bull.

Sounds like its a fueling issue to me. If they got the car to act up when it was there, they should be driving it with the Tech 2 and watching things like fuel pressure and fuel trims.

 

Gimme a break, that's some clever bullshit they're feeding you. Tell them to fix the problem because other cars don't have this issue, do they have any other cobalts on their lot that you can test drive?

 

I am not to happy, clearly we all know as cobalt owners theirs no pre mature rev limiter. That's a great idea when I go in on Monday I will ask someone to go with me to check fuel trims if they will do it. Didn't see any other turbalts I just quickly dropped it off cause I already spoke to the service tech on the phone in advance to explain my issue. I'd love for them to drive another Balt n feel the proper power banD

 

Is their another dealer near you?
Did they put on the work order that the premature rev limiter is kicking in ?
Ask them if they have extense for your fuel tank ?

 

A pre rev-limiter rev-limiter....I smell ****. The closest thing to this the car has is limp mode, and you'd know if you were in that. This sounds like someone (GM or otherwise) is feeding you a severe amount of bullshit to swallow. Who actually investigated this, dealer OR did GM come on-site with technicians?

 

Not sure yet. I am picking it up on Monday. Lol needs all the help it can get

 

Try another dealer and if it's not fixed and they give you the same line of bull **** try contacting the customer service department at GM

 

It's gotta be a bad coil pack.

 

please have them write that on the work order when you pick the car up. take it to another dealer since these idiots just like feeding you BS

 

Yep, I had one go bad. Mine went from occasional to dead within 36 hours though.

 

Ya tell him the rev limiter kicks in when the little needle thingy on the tac goes into the little red area thingy.. Not before.

 

It was that individual dealer, not GM.

GM knows better. It sounds like the techs at that particular dealer didn't want to deal with actually fixing the problem...

 

what about a bad knock sensor? could be over sensitive

 

I think less likely but yeah, that could happen. I think more likely than the sensor being bad is the knock sensors prefer to be a 90* angle. There's two under the intake mani. I saw it in a thread and a tuner discovered this. They didn't have any trouble with that so to speak. Just something they noticed while trying to tweak the tune.

I think coil pack or MAF. I've had loads of issues with my MAF due the wiring harness being absolute crap. I also had a coil pack go out once too though.

 

I'm no professional. It could be a lot things, including the front 02. I'm just going for what I consider the most likely issue. It seems like it happens under extreme load, so I think it's fire or fuel related. I'd go with fire first because the fueling doesn't usually have issues.

 

Classic sign of a bad coil pack. Ask anyone with a 4.6 Liter Ford engine with coil on plug and they will tell you when a coil pack goes THAT is how it happens.

 

I am going into the dealer tomorrow. I'll keep u all updated

 

sub'd for similar problems...

 

Tell them you'll consider the idea if they can produce documentation about it.

 

correct me if im wrong but is it not under extreme load when the knock sensors would be most active. Im not saying that the knock sensor is causing the problem but it is a possibilty.

 

You make a good point.

 

I am not trying to personally talk down to any idiot on this forum, but for **** SAKES!!!! If you take the car down the road before it is completly warmed up and beat the **** out of it by no lift shifting the car will ******* backfire and set a random ******* miss ******* code......*******. how about letting the car warm up first....just saying

 

Buddy calm down you don think I know that, I don't drive it like I stole It, I respect the car since it's my dd, but when u want to use the power it gets super annoying and invasive.

 

Take it to dueck on marine ive dealt with them before for a few things and ive never had any issues with them.