engine power reduced, Engine Disabled warning
05-13-2010 | 02:59 AM
#26
Member
Joined: 09-27-05
Posts: 238
Likes: 2
From: Portland. OR
I've never had the problem. 45K miles, Stage 2 GM.
After reading this, I pulled the intake tube off (stock) where the crankcase vents into it, dry. No oil. Mayby a bit dusty. I haven't even changed the stock air filter yet.
If your engine has blowby, it has bad ring seal, or a burned piston etc.
If you have mods and beat on it all the time, and the tune isn't right, well, this can happen.
Kind of leads into the failed/clogged CAT discussion. If the engine has blowby, it's burning oil that comes in from the intake tube. Or oil that gets past the rings.
The cat just helps burn this up, but has to get real hot to do it. Hence, melted or clogged cat.
Just some thought from an old guy who has been around this stuff for a bit.
phatnackySS, I'd suggest a leakdown test.
Ron
After reading this, I pulled the intake tube off (stock) where the crankcase vents into it, dry. No oil. Mayby a bit dusty. I haven't even changed the stock air filter yet.
If your engine has blowby, it has bad ring seal, or a burned piston etc.
If you have mods and beat on it all the time, and the tune isn't right, well, this can happen.
Kind of leads into the failed/clogged CAT discussion. If the engine has blowby, it's burning oil that comes in from the intake tube. Or oil that gets past the rings.
The cat just helps burn this up, but has to get real hot to do it. Hence, melted or clogged cat.
Just some thought from an old guy who has been around this stuff for a bit.
phatnackySS, I'd suggest a leakdown test.
Ron
https://www.cobaltss.net/forums/problems-service-maintenance-69/car-died-after-acceleration-212271/
i had pretty much the same problem.
first time i was getting on the highway riding 3rd @ about 4500 5000rpm traffic clears , i press down on the gas hit boost hear a pop, so i push in the clutch and the car stalls. i let the clutch back out i hear the engine restart, but the tach isnt working. i flip the key off and back on while still moving , and the car starts to back fire like crazy,sounded like anti lag. i pull over turn the car off check it all out on the side of the highway. i decided to try to restart it and it ran fine for a few days.i got no cel or message.
second time it happened it was the same kind of event i was riding 3rd high as i was waiting for the car in front of me to move over , i press down on the gas i hear a pop ,but this time i got engine power reduced and p068 code. pull over ,let it sit, restarted and ran fine.
so i get home pull the TB and Maf off and they were both filthy ,and there was oil in the intake tube.
i cleaned both, and haven't had a problem yet(about a week). one thing i have noticed is my MPG has gone up 2-3miles and the car idles like butter.
looks like thies cars develop some nasty blow by, im gonna look into a catch can.
looks like oil runs down the intake tube and into the air filter were it contaminates the MAF.
i hope this was the only problem.
i had pretty much the same problem.
first time i was getting on the highway riding 3rd @ about 4500 5000rpm traffic clears , i press down on the gas hit boost hear a pop, so i push in the clutch and the car stalls. i let the clutch back out i hear the engine restart, but the tach isnt working. i flip the key off and back on while still moving , and the car starts to back fire like crazy,sounded like anti lag. i pull over turn the car off check it all out on the side of the highway. i decided to try to restart it and it ran fine for a few days.i got no cel or message.
second time it happened it was the same kind of event i was riding 3rd high as i was waiting for the car in front of me to move over , i press down on the gas i hear a pop ,but this time i got engine power reduced and p068 code. pull over ,let it sit, restarted and ran fine.
so i get home pull the TB and Maf off and they were both filthy ,and there was oil in the intake tube.
i cleaned both, and haven't had a problem yet(about a week). one thing i have noticed is my MPG has gone up 2-3miles and the car idles like butter.
looks like thies cars develop some nasty blow by, im gonna look into a catch can.
looks like oil runs down the intake tube and into the air filter were it contaminates the MAF.
i hope this was the only problem.
05-13-2010 | 09:39 AM
#27
Senior Member
Joined: 12-04-06
Posts: 1,794
Likes: 4
From: Merritt Island ,Fl
I've never had the problem. 45K miles, Stage 2 GM.
After reading this, I pulled the intake tube off (stock) where the crankcase vents into it, dry. No oil. Mayby a bit dusty. I haven't even changed the stock air filter yet.
If your engine has blowby, it has bad ring seal, or a burned piston etc.
If you have mods and beat on it all the time, and the tune isn't right, well, this can happen.
Kind of leads into the failed/clogged CAT discussion. If the engine has blowby, it's burning oil that comes in from the intake tube. Or oil that gets past the rings.
The cat just helps burn this up, but has to get real hot to do it. Hence, melted or clogged cat.
Just some thought from an old guy who has been around this stuff for a bit.
phatnackySS, I'd suggest a leakdown test.
Ron
After reading this, I pulled the intake tube off (stock) where the crankcase vents into it, dry. No oil. Mayby a bit dusty. I haven't even changed the stock air filter yet.
If your engine has blowby, it has bad ring seal, or a burned piston etc.
If you have mods and beat on it all the time, and the tune isn't right, well, this can happen.
Kind of leads into the failed/clogged CAT discussion. If the engine has blowby, it's burning oil that comes in from the intake tube. Or oil that gets past the rings.
The cat just helps burn this up, but has to get real hot to do it. Hence, melted or clogged cat.
Just some thought from an old guy who has been around this stuff for a bit.
phatnackySS, I'd suggest a leakdown test.
Ron
05-13-2010 | 09:44 AM
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