What is wrong with my cobalt?

5

Asked by Aug 24, 2014 at 08:26 PM about the 2006 Chevrolet Cobalt SS Supercharged

Question type: Maintenance & Repair

I recently bought a 2006 Cobalt SS SC stage 2 w/ 126K and a rebuilt top end. It started hard due to a weak battery with corroded terminals so I replaced it. After that, it hasn't run the same. It's got a rough, surging idle and stalls out after a minute or so of running. It would also go into limp mode when my RPM's went too high. I tried cleaning the TB and making sure all vacuum lines were in place, but that didnt help. It also smoked a lot. i ended up replacing the engine when I found some internal damage in cylinder 1. Now it runs a little longer and doesn't smoke as much, but it still stalls and runs rough. I can't take it anywhere - I can't really get it into reverse and it stalls when i give it gas in gear. The most frustrating part about this is that it's not throwing any codes. I work at a garage and have run out of ideas on what could be the problem. Please help.

3 Answers

3,695

If it is a GM stage II upgrade you might have to take it to the dealership to see if they can diagnose it. While there's any number of electronic issues that might be causing this it kind of sounds timing related. I'd take a look at the top end again. Maybe timing chain related? Did you replace the engine with another LSJ? That is the specific engine for the SS/SC Cobalt. Please let us know how this turns out. I have a stage II SS/SC as well so I'm always interested in what other people are experiencing with theirs.

5

I replaced it with another LSJ from a 2006 SS SC. Some of the people I work with think its a throttle position sensor issue, which makes sense. I kept the same throttle body. Also, I did timing adjustments on both engines and I know it's not that. I found out from experience that the engine won't start if the triggers aren't aligned properly (CMP/CKP) and the timing is off.

215

Its the car ever run good before you had the problem with the batterie? Did you replace the first engine and still does almost the same the second engine? With parts that you using from the first engine? Have you ever think that you might have a fuel problem??? Lack of fuel pressure,or just bad fuel?

Your Answer

Add photo

Related Questions

Cobalt

Looking for a Used Cobalt in your area?

CarGurus has 4,794 nationwide Cobalt listings starting at $1,500.

ZIP:

Search Chevrolet Cobalt Questions

Chevrolet Cobalt Experts

#1 lightGear
lightGear
Reputation 1,080
#1 FordNut
FordNut
Reputation 1,080
#3 dandyoun
dandyoun
Reputation 900
View All

Related Models For Sale

Used Chevrolet Malibu
1,076 Great Deals out of 85,119 listings starting at $1,995
Used Honda Civic
705 Great Deals out of 77,526 listings starting at $1,200
Used Ford Focus
746 Great Deals out of 59,013 listings starting at $995
Used Chevrolet Impala
796 Great Deals out of 34,708 listings starting at $799
Used Ford Mustang
399 Great Deals out of 44,403 listings starting at $1,000
Used Honda Accord
886 Great Deals out of 82,090 listings starting at $999
Used Nissan Altima
1,094 Great Deals out of 83,208 listings starting at $670
Used Toyota Corolla
923 Great Deals out of 74,282 listings starting at $1,500
Used Dodge Charger
393 Great Deals out of 30,065 listings starting at $2,343
Used Toyota Camry
1,076 Great Deals out of 98,044 listings starting at $1,250
Used Chevrolet Cavalier
1,347 listings
Used Chevrolet Silverado 1500
2,297 Great Deals out of 156,238 listings starting at $1,395

Used Cars For Sale

2010 Chevrolet Cobalt For Sale
20 Great Deals out of 849 listings starting at $2,500
2009 Chevrolet Cobalt For Sale
13 Great Deals out of 827 listings starting at $1,500
2008 Chevrolet Cobalt For Sale
4 Great Deals out of 841 listings starting at $2,999
2007 Chevrolet Cobalt For Sale
3 Great Deals out of 926 listings starting at $2,995
2006 Chevrolet Cobalt For Sale
5 Great Deals out of 935 listings starting at $2,500