Car has rough idle, big loss of power, black smoke from exhaust, smokey smell of flooding

Paully
0

Asked by Paully Jun 09, 2012 at 06:59 PM about the 2005 Pontiac Sunfire

Question type: Maintenance & Repair

Parked my 2005 Sunfire last night and everything was fine. Started car this morning and it is like the engine has
no power, and the idle is not smooth and responsive. It is like the car is flooding out and is getting too much
gas to burn in engine. I get a trouble code of 0300 which indicates an engine misfire. The car does not backfire
and the engine runs evenly but sort of idles weakly. When I try to drive the car it has no power and won't
accelerate hardly at all. I replaced the oxygen sensor, and installed new spark plugs. Two of the plugs were
fairly black. It seems to me like the air/fuel mixture is way to rich. I there a sensor or something that controls the
air/fuel mixture and if so is there a way that I could check to see if it is functioning properly. Thanks.

6 Answers

Andrew Peerenboom
265

You are correct, black smoke means a lean mixture. The miss fire code solidifies this diagnostic. Most common cause: Clogged air filter. Check it first. If the filter is good, second step is MAF sensor and throttle position sensor. The fuel injector sensor is the next step. If after all that, it's still a problem, the fuel injection system itself could be bad. I.E bad injectors.

1 out of 1 people think this is helpful.
aztec626bf
7,445

Black smoke usually indicates a rich mixture.

2 out of 2 people think this is helpful.
Jason Zane
3,435

next.. check your sparkplug wires and ignition coil & module. one or two cylinders are not firing.

Eric Anthony
80

maybe yell at your gf for switching the 2 plug wires around ;) lol j/k. I'd start with checking the air filter...then make sure all your vacuum hoses are connected but, it sounds like ur exhaust converter is plugged...or maybe the ole' bananna in the tailpipe trick....run the car at night and see if the converter has a red glow..if so...converters plugged. I may joke around alot...but, I been working on cars for over 25 years

1 out of 1 people think this is helpful.
rowsell
30

i changed the converter and new plugs new wiers new coil and now power and getting to much gas ,and the converter is red what wiill do next lit me know

3 out of 3 people think this is helpful.
Jason Zane
3,435

maybe your injector is stuck open.. have u seen which cylinder haws the fuel on the sparkplug?

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Sunfire
Looking for a Used Sunfire in your area?
CarGurus has 759 nationwide Sunfire listings starting at $1,800.
ZIP:

Search Pontiac Sunfire Questions

Pontiac Sunfire Experts

#1 John Saffrahn
John Saffrahn
Reputation 1,210
#2 Warren0007
Warren0007
Reputation 700
#3 Joeyadams
Joeyadams
Reputation 670
View All

Related Models For Sale

Used Chevrolet Cavalier"
23 Great Deals out of 2,154 listings starting at $999
Used Honda Civic"
804 Great Deals out of 56,360 listings starting at $995
Used Pontiac Grand Prix"
176 Great Deals out of 5,315 listings starting at $990
Used Pontiac Grand Am"
72 Great Deals out of 2,535 listings starting at $1,200
Used Toyota Corolla"
1,152 Great Deals out of 53,825 listings starting at $995
Used Ford Mustang"
1,045 Great Deals out of 25,221 listings starting at $1,329
Used Ford Ranger"
370 Great Deals out of 6,656 listings starting at $700
Used Mitsubishi Eclipse"
73 Great Deals out of 1,984 listings starting at $1,695
Used Saturn ION"
92 Great Deals out of 1,930 listings starting at $600
Used Pontiac G6"
414 Great Deals out of 8,070 listings starting at $2,000
Used Ford Focus"
1,721 Great Deals out of 62,589 listings starting at $1,400
Used Dodge Neon"
39 Great Deals out of 1,507 listings starting at $1,400
Used Pontiac Solstice"
58 Great Deals out of 605 listings starting at $5,995

Used Cars For Sale

2005 Pontiac Sunfire For Sale
9 Great Deals out of 152 listings starting at $2,200
2004 Pontiac Sunfire For Sale
4 Great Deals out of 103 listings starting at $1,995
2003 Pontiac Sunfire For Sale
4 Great Deals out of 80 listings starting at $1,800