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I have a 2007 trail blazer with a PO300 code showing. It it is idling really rough and smells like raw gas coming out of the tail pipe. Would really like help with this issue I know the dealer is going to charge an arm and a leg and I have a feeling it is just something simple in the electrical just need an idea of where to start. Thanks

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  • Cars & Trucks Master
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To start with have the fault codes read and fix the faulty sensor. May be just an HO2s sensor Don't guess . Follow the codes and save money.

Posted on Mar 18, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Running rough

Could be a bad catalytic converter, check under the car and see if they turn a hot red color.

Posted on Nov 06, 2008

kirkx
  • 2019 Answers

SOURCE: 1995 gmc jimmy 4x4 rough idle smell gas from tail pipe

To check EGR valve, plug the vacuum hose to it, and it should not get hot anymore. It if does, it is leaking.
But gas smell is usually bad plug wire or plug.
With good insulation, remove one sparkplug wire at a time, to see if one has no effect. That is the target.

Posted on Jul 25, 2009

  • 67 Answers

SOURCE: idling up and down between 1200 and 800 rough idle 2002 saturn sl

oooooooooooo my friend white smoke mens head gasket is gon sorry

Posted on Dec 11, 2009

  • 541 Answers

SOURCE: 1988 gmc 1500 Gas smell coming from tail pipes

running rich?. make sure your air cleaner is clean the filter is clean. how old are plugs, wires, cap, rotor, o2 sensors? also you feul injectors could be leaking extra feul into the engine. run the engine with the air cleaner off. let it warm up. shut off. look at the injectors with a light to see if they are leaking. does it burn alittle on whenb you first start it?

Posted on Dec 26, 2009

  • 10 Answers

SOURCE: truck idling smooth suddenly rough

Please post other info. model, mileage, engine size, year, any work done to it recently?

Posted on Mar 15, 2011

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02 trail blazer running very rough and can smell gas bad in exhaust


You have an engine misfire , raw fuel is going through the engine an out the exhaust . This will destroy your catalytic converter if not fixed . Is the check engine light on ? Do you know how to trouble shoot a misfire ? videos on you turtube showing how !

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1993 CHEVROLET S10 BLAZER-WHEN DRIVING IDLE IS AT NORMAL SPEED. BUT, WHEN YOU COME TO STOP, IDLE IS HIGH. WHAT IS MY PROBLEM?


My 93 s10 blazer idles really ruff and i
erratically for the first few minutes until it warms up. It now sound like its going to stall every morning I start it up and black soot comes out the tail pipe onto the pavement but only while its idling rough. After i changed the cap and rotor it idled good for a couple days then started doing it again.Already changed the fuel filter and pcv valve. whats the problem?

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oooooooooooo my friend white smoke mens head gasket is gon sorry

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