Question about 2005 Chevrolet Impala

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Gas fumes at start up and idle with visable liquid

Looks like a filter between throttle body and injector body with visible gas on the filter? Can smell fumes at start up and idle. Is this a filter or is this part of the throttle or injector body? I believe it can be replaced but not completely sure.

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This is a Gasket. You can get it at any GOOD Auto Parts Store. Tell them that you need a Throttle Body Gasket or even let them look at it, They can tell which one.

Posted on Jan 15, 2009

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Idles too low and dies


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We also own a 2005 chevrolet impala with strong gas fumes, inside of the car driving or just idling..also fumes are strong when the car is just idlin. Took it to the mechanic and put the car on the rack,...


I would have someone check under the front of car while engine was running. Maybe then a gas leak could be spotted. Did he check the charcoal canister-it's a gas vapor collector from the gas tank, and maybe located at front of car. If the canister is full and not working to purge the canister and send the collected fuel and vapors into the engine, it might be what you are smelling.

Jan 22, 2013 | 2005 Chevrolet Impala

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Poor idle,hard start in the mornings and gas smell and slight hesitation on move off


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Feb 07, 2012 | 2005 Toyota Yaris 1.3

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Please help! I've got a 94 GMC Jimmy 4.3 Votec manual trans. 2wheel drive. a couple of minutes after starting it up. it will only idle if you give it gas it will sputter and die. i looked into the throttle...


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Stalls out when idling, such as at stop light. Will start back up with no problem.


Hi. This idling problem relates to the Idle Air Control Valve (IAC). Most surely it is clogged with dirt. No need to replace it, jus clean it. To clean it you first find it, unstallit, clean it and next reinstall it. It is located in the throtle body, beneath the air intake hose. The IAC provides alternate ventilation to the engine when rpm's are slow, such as when idling. When the IAC valve is clogged it wont open at the command of the Powertrain Control Module and so the engine stalls. Once you locate, unplug its connector, unscrew it (use a star screwdriver) and take it off the throtlebody neck. Spray it with Electronic Conctact Cleaner (3M brand will do) while moving its movable parts with your hands, you will see much black dirt coming out. Continue doing it until liquid comes out clear. Next, let all liquid drip out and wait until the ramaining liquid inside evaporates. That liquid is quick to evaporate. Next reassemble and you are all done. Your IAC will continue to provide you with many years of use. Ah, make sure that when installing the air intake hose back in place, the rubber ring that nests it on the throttle body is well nested to prevent dust and dirt to get inside in the future. That dirt, sand, fumes and dust if allowed enter the throtle body and also the IAC vent clogging it. So make sure the air intake hose is well sealed and only lets filtered air to get in the throtle body. bye.

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98 5.7 that "studders" under accelerating. new filter, new cap and rotor, 100,000 done 15,000 ago. Seemed to run fine after injector cleaner, but that lasted about 5 tanks of gas. Problem returned even...


Look inside the throttle body with a flashlight. If the intake manifold looks wet or is cleaned off inside, then the SFI fuel injectors are leaking. This will cause poor performance and poor fuel economy. If this is the problem, have the injectors replaced with an upgraded MFI assembly.
Also you did'nt mention spark plugs, check/replace if you have not already.

Dec 13, 2009 | 1997 Chevrolet K1500

1 Answer

Car turns over great will not start


IT DEFFO SOUNDS LIKE LACK OF FUEL, BUT FOR IT NOT TO RUN AT ALL UNLESS THROTTLE IS FULLY OPEN DOESN'T SOUND LIKE AN INJECTOR, MORE LIKE NO FUEL AT ALL, LIKE THE PUMP IS KNACKERED. PULL OUT AN INJECTOR, PUT IT IN A GLASS JAR, THEN TRY AND START IT, IT SHOULD GIVE A BIG POWERFUL SQUIRT OF FUEL, TRY ALL THE INJECTORS ONE AT A TIME, BECAUSE ITS QUITE RARE FOR ALL THE INJECTORS TO GO AT TE SAME TIME

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