08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Car loses power above 4 grand

Old Jul 22, 2010 | 03:43 AM
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From: galesburg, IL
Car loses power above 4 grand

Ok so about 2-3 months ago i got on my car hard in 2nd gear and noticed when it hit right around 4 grand it would basically die on me untill I left off. I could cruise just find as long as i was under 4k. I also noticed alot of popping coming from the exhaust between 1-2 shifts and occasionally when coasting in a lower gear. I originally thought that it was bad fuel since I fill the tank twice a week and just started going to a new gas station. After switching gas stations it went away and i thought problem was fixed until recently It started doing it again. Now my new theory is that im getting water in somewhere because I realized that it only does it when it rains once it stops raining and I drive around for about 45 minutes it works just fine. Any help would be great
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Old Jul 22, 2010 | 09:42 PM
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The misfiring could be a coil pack going bad and the loss of power could possibly be KR. Any codes?
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Old Jul 22, 2010 | 09:48 PM
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how much does a coil pack usually run?
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Old Jul 22, 2010 | 09:54 PM
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free aka warranty
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Old Jul 22, 2010 | 11:51 PM
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Originally Posted by 09bluebaltss
free aka warranty
x2^^
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Old Jul 23, 2010 | 12:21 AM
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I had the same happen to me. Car would die at 5,500 n up and pop n bang n stutter all the way to redline. I thought it was my catless dp (had a emissions code) put my stock dp in no engine light still does it. I out new plugs in, still does it..did a compression test, still dies. I'm taking the s.o.b in tmr lol
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Old Jul 23, 2010 | 12:47 AM
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From: Pittsburgh, Pistolvania
Stuff like this is why its nice to have a 5/100,000 warranty on the powertrain.
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Old Jul 23, 2010 | 12:49 AM
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Yep, I need to get my power steering fixed anyways So I'll hit 2 birds with 1 stone
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Old Jul 23, 2010 | 07:03 AM
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i dont have any codes at all and i still have the warranty since im still stock but everytime i get a chance to take it in it stops doing by the time i get to the dealer and you know how they work. it didnt do anything for us it must be fine. dam stealerships
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Old Jul 23, 2010 | 12:40 PM
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Yeah I hear yea, I'm going in today n hopefully they can sort out the issue
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Old Jul 23, 2010 | 12:51 PM
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Front O2, spark plugs, or Coil Packs. Im having a similar issue but it's above 6K that my car likes to misfire and die off. I just ordered a set of used packs on Ebay for $130, I didnt see any other sets tho, sorry!

Ill let you know if that fixes my issue
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Old Jul 23, 2010 | 01:04 PM
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i had this issue. My MAF was loose. Reconnected the MAF and the problem was gone
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Old Jul 23, 2010 | 02:17 PM
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^I also ordered another MAF, mine is in correctly but it was cheap, so worth a shot there too!
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Old Jul 23, 2010 | 02:50 PM
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Hmm never assumed it was my maf sensors being loose, the car feels great when u hammer on it but after 5,500 ut feels like it starving from something. I got an appoinent tmr morning I am trying to get a hold of the shop supervisor to drive it, cause they always say nothings wrong blah blah
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Old Jul 24, 2010 | 12:25 AM
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thanks guys ill have to try all these things when i get a chance this weekend and see if it helps
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Old Jul 24, 2010 | 01:59 AM
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Originally Posted by Josh Leverington
I had the same happen to me. Car would die at 5,500 n up and pop n bang n stutter all the way to redline. I thought it was my catless dp (had a emissions code) put my stock dp in no engine light still does it. I out new plugs in, still does it..did a compression test, still dies. I'm taking the s.o.b in tmr lol
sig says "tvm sts" its twm sts. just wanted to let you no.
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Old Jul 24, 2010 | 11:32 AM
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From: Coquitlam BC
Originally Posted by hiltu
sig says "tvm sts" its twm sts. just wanted to let you no.
Ah thanks
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Old Jul 24, 2010 | 11:35 AM
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Is it possible that you are getting the coilpacks damp. I know on the Fords when you wash the engine bay water can pool in the valve covers where the coil packs are, and it causes bad misfires.
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Old Jul 24, 2010 | 12:37 PM
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Originally Posted by BYT*SS*TURBO
^I also ordered another MAF, mine is in correctly but it was cheap, so worth a shot there too!
Should have PMed me I have a 2nd MAF.
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