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Hey, I’m new to these forums, figuring out how this all works lol,
I do have an issue with my cobalt though, I got random misfire between cylinders 2 3 4, but only happens on cold starts, otherwise it drives perfect no issues,
these are the freeze frame data
I have the k and n intake and Injen charge pipe and only have 49,000km I’ve done the CRC valve intake cleaner through the brake booster vac line, changing the spark plugs today hoping it’s going to fix my issue but when I took them out and swapped them around they looked normal I also switched around the coils, P0300 P0302 P0303, and pending P0300 P0302 P0303 P0304, this is the first time I’m using my cobalt in the cold
What Kolt said- Crc May work, but it's only going to if you let it set on the valves for a period and then you have to use files, brushes, pics, etc to actually remove the gunk.
What Kolt said- Crc May work, but it's only going to if you let it set on the valves for a period and then you have to use files, brushes, pics, etc to actually remove the gunk.
even though this only happens in the cold during the warm up
We have a entire bulletin specific to carbon build up causing cold start issues and misfires. The issue with the buildup is first noticed cold and will continually get worse until eventually you'll notice it while driving. Cold Start Misfire Bulletin.pdf
We have a entire bulletin specific to carbon build up causing cold start issues and misfires. The issue with the buildup is first noticed cold and will continually get worse until eventually you'll notice it while driving. Attachment 62169
how would I be able to prevent the carbon build up ? I know with it being direct injection it’s prone to it but is there any preventative steps ? I either go to esso 93 octane or petro 94 octane, I also have a catch can I baby my car, this is the first time it’s seeing the winter and that’s only because I got a 2018 Camaro 1LE
Good top tier gas, frequent oil changes with full syn, driving easy, and not taking short trips will keep it from happening as quickly but it wont stop it. The only way to really "stop" it is to go with the powell separator. Think v3 is the one you want now. A regular catch can wont do much on these cars.
Yep which Esso and Petro were on that list, I do drive it nice not rough and I’ll look into that V3, and I use Mobil 1 full synthetic and always do oil change when monitor is at 50 percent
I personally don't watch the oil life, im a 3k or 6mo strict kinda person myself. At work I see the oil life system fail a lot of people who don't know better. You may have to contact him or Gloria directly through here, facebook, or email. I know nova was selling his v2 I believe. Its not as good as the v3 but it still works good.
You already have one Eric?
It is an issue with any di engine regardless if it's a $75000 German car or your cobalt. There is nothing to wash anything off the valves due to just air and oil blow by going through the intake. Turbo motors are the worst at coking.
You already have one Eric?
It is an issue with any di engine regardless if it's a $75000 German car or your cobalt. There is nothing to wash anything off the valves due to just air and oil blow by going through the intake. Turbo motors are the worst at coking.
Yeah I have the powell v1, did the cleaning at around 60k (have to look at my notes) and I'm at 118k now. The CRC DI stuff makes a bit of a difference, but if the build up is bad (not wanting to look at the wife's A4 intake runners because it's doing the semi rough idle...so I know its bad) it will help a bit but not as well as a walnut blast. I'm sure if you did the CRC DI stuff every 6-10k depending on driving it would prolong the walnut blasting to every 100-150k.
When I pull apart the A4 I'll likely be looking at how I can design one for it even if I can't get it recycle the collected oil.
My friend has a 720whp 335i and walnut blasted last fall. It was amazing before and after what it gets off. But like said. doesnt matter what brand. DI it will happen regardless. IMO walnut blasting every 30k is best. its relatively easy to do. look it up on youtube.
11-29-2018, 11:13 AM
