2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

sputtering, backfiring, and misfiring

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Old Apr 28, 2010 | 11:51 PM
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sputtering, backfiring, and misfiring

OK, here is my issues... I NLS'd today and missed the gear. i revved high but hit the limiter. after that, my car started misfiring just as it would on a cold NLS. i shut it off, tried restarting it, but no change. sounds like a subaru. popping backfiring and misfiring. i changed the sparkplugs, gapped them to manufacturers specs. i have recently put a catless DP on. I'm getting p0107 code. also there is a lot of liquid in the exhaust, doesn't smell like coolant or gas, but there is a lot of it... whats wrong with my car? i posted this in a few places so....

anybody?

Last edited by kretty; Apr 28, 2010 at 11:51 PM. Reason: Automerged Doublepost
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Old Apr 28, 2010 | 11:53 PM
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does it smoke?
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Old Apr 29, 2010 | 01:40 AM
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From: Tejas
See my reply to your post in the other thread:
https://www.cobaltss.net/forums/show...4&postcount=38
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Old Apr 29, 2010 | 08:37 AM
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Doesn't smoke, its on its way to the dealer to get looked at.
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Old Apr 29, 2010 | 09:46 AM
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Originally Posted by Stamina
See my reply to your post in the other thread:
https://www.cobaltss.net/forums/show...4&postcount=38
^This

Do you have the RPD?
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Old Apr 29, 2010 | 09:50 AM
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Dont misss a gear and you wont run into that problem..lol
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Old Apr 29, 2010 | 09:56 AM
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Originally Posted by Supercharged Guy
Dont misss a gear and you wont run into that problem..lol
r u tuned... cause if so mine does that even if its warmed up... well doesnt throw that code lol mine throws a misfire code
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Old Apr 29, 2010 | 11:24 AM
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had someone with a similar problem sounding like a Subaru including the misfiring, but nothing dealing with the NLS. He busted his intercooler once and replace it with a PVC pipe temporary. Then his mom put 89 Octane in his fuel tank, after all that on his birthday ready to go to SC to visit a couple of friends. His car wasn't the same again. Done all straight pipe w/o sensors, driven it hard most of the time like he stoled it, and replaced his spark plugs, but nothing was ever change. Now it sounds like a Subaru, but he got rid of it a long time ago before I gotten my 09 SS/TC.
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Old Apr 29, 2010 | 11:35 AM
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Originally Posted by Stamina
See my reply to your post in the other thread:
https://www.cobaltss.net/forums/show...4&postcount=38
This is good to know .
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Old Apr 29, 2010 | 11:54 AM
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Originally Posted by kretty
OK, here is my issues... I NLS'd today and missed the gear. i revved high but hit the limiter. after that, my car started misfiring just as it would on a cold NLS. i shut it off, tried restarting it, but no change. sounds like a subaru. popping backfiring and misfiring. i changed the sparkplugs, gapped them to manufacturers specs. i have recently put a catless DP on. I'm getting p0107 code. also there is a lot of liquid in the exhaust, doesn't smell like coolant or gas, but there is a lot of it... whats wrong with my car? i posted this in a few places so....

anybody?
P0107 is a map sensor low voltage code. You blew the map so the fueling is all screwed up and the car is misfiring. The fluid you are seeing is likely water from the combustion process.
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Old Apr 29, 2010 | 04:35 PM
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so, ended up blowing the map sensor, boosted to 43lbs and threw a few rockers, everything is being covered under warranty. what a ride. lol i knew the pop i heard wasnt a good one.. haha, gettin her back 4-30-10. cant wait.
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Old Apr 29, 2010 | 04:40 PM
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Holy cow! Both for the blowing of it and the fact that they are covering it under warranty.
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Old Apr 29, 2010 | 04:43 PM
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my dealership takes care of me. puttin the DP on tomorrow again. lol
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Old Apr 29, 2010 | 04:44 PM
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Originally Posted by kretty
so, ended up blowing the map sensor, boosted to 43lbs and threw a few rockers, everything is being covered under warranty. what a ride. lol i knew the pop i heard wasnt a good one.. haha, gettin her back 4-30-10. cant wait.
Exact same thing happened on a friend of mine's SS/TC about two weeks ago. Missed a gear, and busted his rocker. Odd. How do you know you hit 43lb's? Cause that ain't happening on the stock map's readout wise. And yeeeeah.
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Old Apr 29, 2010 | 04:48 PM
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Originally Posted by pantherqs
Exact same thing happened on a friend of mine's SS/TC about two weeks ago. Missed a gear, and busted his rocker. Odd. How do you know you hit 43lb's? Cause that ain't happening on the stock map's readout wise. And yeeeeah.
I dunno because even if he is talking 43 lbs absolute pressure that is still 28.5 lbs guage pressure.
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Old Apr 29, 2010 | 05:07 PM
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Maybe he has one of those aftermarket gauges that captures peak boost. Just speculatin'.
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Old Apr 29, 2010 | 10:01 PM
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That's what the tech said he read from the computer... I dunno. Sounds kinda high, I'm just relayin info... It will be back on the road tomorrow. It'll be catless again soon as well.
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Old Apr 30, 2010 | 11:28 AM
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any idea if the catless DP is causing problems? im assuming not because almost everybody has one....
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Old Apr 30, 2010 | 12:22 PM
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Originally Posted by kretty
any idea if the catless DP is causing problems? im assuming not because almost everybody has one....
Nope.
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