1.4T check engine woes...
- Thread starter SourKandi
- Start date
Sneakerfix
New member
The early cruzes/sonics have an issue with the wastegate pin and oil coking in the oil feed line
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SourKandi
New member
I had a missing non return valve in the intake. So my turbo hasn't been working properly for some time. Including when I first took it in to the first dealership. There was a service bulletin put out about it at the same time my car was having issues. It exhibited most of the symptoms. The dealership just fixed what the issue resulted in and not what caused it in the first place. Which is what I told them all along. They didn't think of going "why did a less than 2 yo cat fail?" This resulted in 5 trips to the mechanic since February, and a total of 4 weeks without my vehicle at all.
I didn't end up with a new turbo, I ended up with a fixed intake. And a car that works. And a terrible experience with "certified" Chevy mechanics.
I still think that my car doesn't feel quite right. There's still something that has changed. Maybe just the damage that was done has changed the vehicle for good. Who knows.
I'll let yall know if anything else happens. :/
I didn't end up with a new turbo, I ended up with a fixed intake. And a car that works. And a terrible experience with "certified" Chevy mechanics.
I still think that my car doesn't feel quite right. There's still something that has changed. Maybe just the damage that was done has changed the vehicle for good. Who knows.
I'll let yall know if anything else happens. :/
SourKandi
New member
Also, the high pitched squealing tone is still there, only now it's constant instead of every once in awhile. Kinda like a vac leak would sound. Am I just wrong? Does anyone else's car do this?https://vimeo.com/125866418
carlos craveira
New member
Spark plugs
SourKandi
New member
What exactly are you referring to? Like do you think they are bad? Or they just make that sound? I was wondering about replacing mine but was told they are good for about 100K
carlos craveira
New member
Are loosened. In my this happened. Just screw. Tighten.
SourKandi
New member
So, I've been noticing the last couple weeks something has been "weird" about my engine again. I haven't been able to place it yet. And then the last few fill-ups, I've had a dramatic drop in fuel efficiency. I installed an ultra-gauge on Monday. I haven't been able to set up all the pages yet, but watching some of the basics. Last night my car threw a pending P0299 again, according to the gauge. So, not enough to trip CEL, but confirms my suspicions that something wasn't quite right. Of course this happens on holiday weekend and I can't schedule a trip to the dealer.
I need some advice on what to look for. I don't know how to read the boost gauge, to know if it's boosting/reading correctly. Anyone else with an Ultra-Gauge that can give me some tips on a good page set up?
The check-valve in the turbo was replaced on the last repair which *supposedly* fixed all the issues I was having.
The scenario last night when the alarm sounded:
Rainy, full passengers, merging onto hwy ramp, accelerating and maintaining hwy speed, but not WOT, by any means going about 50-53mph.
It felt lately like it has a "hiccup" when accelerating. It's hard to describe I guess. Also when I take foot off the pedal it seems to decelerate faster than normal. Almost as if applying the brakes. (My husband notices this more than I do-it's like the car hates to coast. I believe that that is just an auto-trans thing.)
Idk. I want to look at things myself but am not confident about it without a repair manual available to me. This is my FIRST ever turbo in my 22 years owning/driving a car. It feels so different than anything I have ever driven, and I have to say I'm a bit intimidated.
Looking for support again guys. Any advice would be awesome.
I need some advice on what to look for. I don't know how to read the boost gauge, to know if it's boosting/reading correctly. Anyone else with an Ultra-Gauge that can give me some tips on a good page set up?
The check-valve in the turbo was replaced on the last repair which *supposedly* fixed all the issues I was having.
The scenario last night when the alarm sounded:
Rainy, full passengers, merging onto hwy ramp, accelerating and maintaining hwy speed, but not WOT, by any means going about 50-53mph.
It felt lately like it has a "hiccup" when accelerating. It's hard to describe I guess. Also when I take foot off the pedal it seems to decelerate faster than normal. Almost as if applying the brakes. (My husband notices this more than I do-it's like the car hates to coast. I believe that that is just an auto-trans thing.)
Idk. I want to look at things myself but am not confident about it without a repair manual available to me. This is my FIRST ever turbo in my 22 years owning/driving a car. It feels so different than anything I have ever driven, and I have to say I'm a bit intimidated.
Looking for support again guys. Any advice would be awesome.
Maddmatts
Member
P0299 is a code for an Underboost condition, literally meaning that the computer is seeing less boost than what it was programmed to expect.
There's a service bulletin for this code to inspect the wastegate linkage for excessive wear. But there are other things that can cause this code.
Check hoses to make sure they're connected at both ends including the vacuum lines under the intake manifold.
Check air filter for clogs.
Typically when the check engine light is finally triggered for this code, the PCM deactivates the turbo as a precaution but is still generally safe to drive. Although highways can be a little scary with limited power.
Ultragauge's boost meter measures air pressure with ambient pressure as zero. Negative readings are measuring vacuum which is normal at idle and low throttle. Positive readings are boost and should be seen during moderate to hard accelerating or cruising at ~60mph or more.
There's a service bulletin for this code to inspect the wastegate linkage for excessive wear. But there are other things that can cause this code.
Check hoses to make sure they're connected at both ends including the vacuum lines under the intake manifold.
Check air filter for clogs.
Typically when the check engine light is finally triggered for this code, the PCM deactivates the turbo as a precaution but is still generally safe to drive. Although highways can be a little scary with limited power.
Ultragauge's boost meter measures air pressure with ambient pressure as zero. Negative readings are measuring vacuum which is normal at idle and low throttle. Positive readings are boost and should be seen during moderate to hard accelerating or cruising at ~60mph or more.
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ChrisJ
Active member
The turbo was just replaced on my Sonic last week due to P0299.
However, the paper I got back said they found oil in the waste gate solenoid and the solenoid would not move with vacuum applied so they replaced the entire turbo under the powertrain warranty @ 63,000 miles +-.
I'm dying to know how oil would get into the solenoid and whether or not the actual problem was fixed.
However, the paper I got back said they found oil in the waste gate solenoid and the solenoid would not move with vacuum applied so they replaced the entire turbo under the powertrain warranty @ 63,000 miles +-.
I'm dying to know how oil would get into the solenoid and whether or not the actual problem was fixed.
ChrisJ
Active member
SourKandi
New member
In and out of the dealer a few more times. Here's the latest news:
When the check valve was replaced, the turbo was not reassembled properly and I haven't had an honest boost in forever. The dealer is finally replacing the turbo since it's now destroyed... All of the P0299 codes my UG was showing me we're all bc it was actually under boost almost all the time.
It was crazy bc the CEL came on Saturday, I called and made an appointment right away for Monday, but the CEL went off Sunday night and the ECM had no record of the code. I picked it back up yesterday afternoon and after driving a couple hours the cel came back on. I called and set up bringing it back this morning, but last night the cel went back off. I called this morning to see if I should still bring it anyway and he was hoping it might have left a trace so on my way in the cel did come back on. Whew.
So- now I'm finally getting the new turbo. In the nick of time.
When the check valve was replaced, the turbo was not reassembled properly and I haven't had an honest boost in forever. The dealer is finally replacing the turbo since it's now destroyed... All of the P0299 codes my UG was showing me we're all bc it was actually under boost almost all the time.
It was crazy bc the CEL came on Saturday, I called and made an appointment right away for Monday, but the CEL went off Sunday night and the ECM had no record of the code. I picked it back up yesterday afternoon and after driving a couple hours the cel came back on. I called and set up bringing it back this morning, but last night the cel went back off. I called this morning to see if I should still bring it anyway and he was hoping it might have left a trace so on my way in the cel did come back on. Whew.
So- now I'm finally getting the new turbo. In the nick of time.
Fantom Blu
New member
I'm having my own problems with a whistling noise that seems to be coming from the same location of the engine bay as that video that sourkandi posted, the dealership has replaced the crank seal under a tsb, and they just replaced the intake manifold, vacuum hose, and hose clamp yesterday (manifold was missing non return valve), my whistle is still there.
The car hasn't thrown a single code at me, its a 2014 with just over 6000 miles.
The car hasn't thrown a single code at me, its a 2014 with just over 6000 miles.
SourKandi
New member
All was seeming better, although I still feel a "slipping" kinda feel accelerating sometimes- but my fuel economy has yet again taken a nose dive. After the new turbo, it shot up to 33mpg, and 34- best ever since I've owned the car. Didn't last long, I'm getting a whopping 19-22mpg now. My 2003 explorer is getting better gas mileage ...
AdorableKaren
Asian Elite
Unlucky sonic day. Threw P0299 today for the first time. Not sure if it is wastegate or turbo failure. Hope to get the car in soon.
