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Blows air from air intake when idling, causes air filter to knock

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  • 93 Answers

To blow air the exhaust would have to be involved. Not much help but a starting place

Posted on Jan 15, 2013


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Posted on Jan 02, 2017

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SOURCE: car making loud humming noise from the air intake

the idle air bypass valve is making noise and resonating through the air inlet the valve needs to be replaced there is also a revised hose to the valve to reduce noise if it hasn't already been replaced

Posted on Jun 16, 2009

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SOURCE: fan works but it blows low heat

there is a cab air filter located under your hood, pass. side under the wiper area, but this should not be the problem if your loosing coolant, check your heater core, if your fan only works on low. check your blower resistor you can pick em up new for around 20 bucks. hope this helps and god bless.

Posted on Feb 09, 2010

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SOURCE: 1999 Hyundai Tiburon. Rough Idle, New air flow

if it clears up at higher rpm,s look for a vacuum leak.if not have the injectors checked and the wires that go to them

Posted on Jun 16, 2010

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SOURCE: could that be causing oil in intake and exhaust

Look at center of engine, at back, and you'll see a black tube coming from drivers side rocker cover, to a short black piece of rubber hose like a 90 degree elbow (which usually cracks or collapses and causes problems).
That should attach to your PCV valve.

Posted on Jul 09, 2010

  • 2926 Answers

SOURCE: I have recently noticed a

There is a blend door that either has a bad actuator or broken plastic clip that holds the door. Unfortunately, it will require the dash to be disassembled to access the door.

Posted on Dec 04, 2010

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2000ford focus 2.0 split port. 5 spd Has no acceleration idles ok when you give gas Bogs unless u eas into it. won't go over 50 mph bad mpg giving codes knock sensor bank one tolean I.A.C. Bad intake?

When is last time you replaced the fuel filter. Replace this and the air filter first( no air, no fuel, lean). Check for vacuum leaks also. Start with the cheapest and work your way up to the intake.

Aug 01, 2015 | Cars & Trucks

1 Answer

Mitsubishi shogun sport has a high idle about 1200rpm but when the car comes to a stop it drops off back to about 800 rpm

idle valve on the intake may need cleaning. a build up of muck from the air intake line can cause this also change the air filter.

Oct 11, 2013 | Cars & Trucks

1 Answer

Mazda 3 won't idle.

code p0 refers to intake air temp sensor --circuit malfunstion causes are wiring open circuit(broken)wiring short to ground bad earth and ECM.
code po113 refers to mass air flow( MAF) sensor/ volume air flow (VAF) sensor --low input. Causes may bewiring short to ground MAF?VAF sensor faulty ECM
code po327 refers to Knock sensor (KS) bank 1--low input. Cause may be insecure (loose) KS poor connection- wiring ---short to ground incorrectkly tensioned KS and ECM

Mar 10, 2013 | Cars & Trucks

1 Answer

My friend asked me to replace the spark plugs on Ford Taurus 2001 3.0 VIN S. After installing the plugs, it idled roughly that it would die at some point. It is also throwing a P0113 now.

The intake air sensor could be stuck at a low temperature,,which would cause the vehicle to make a cold start..Which would cause it to run rich...You really need to see it on a data screen,,to see whats its reading..Are you sure you didnt forget to plug it up...It should be on the duct work around the air filter..Some are located in the intake..You may have knocked it off while you installing the plugs

Sep 22, 2011 | 2001 Ford Taurus

2 Answers

Engine idles rough at stops and in park is it idiling sensor or something

This could be a lot of things. There is no 'sensor' but there is an IAC (idle control valve) that lets air into the engine when you aren't using the throttle. But, when this part goes bad your engine usually will idle really high or not at all. You could have a slight misfire or broken/worn engine/transmission mount. A tune-up could eliminate maintainence caused problems. You should replace the air filter, fuel filter, spark plugs, spark plug wires, PCV valve, and run a good injector cleaner through like Chevron Techron or Valvoline Synpower. If this doesn't solve your rough idle, then you likely have a broken mount somewhere.

Mar 05, 2010 | 1997 Chevrolet Blazer

1 Answer

97 Chrysler 2.5L runs bad when warm stalls and knocks no MIL

It sounds like you did not change those intake manifold gaskets and they are not completely sealing the intake and causing a vacuum leak and the MAP sensor will read high in voltage and cause the bad idle.

Oct 29, 2009 | 1997 Chrysler Sebring

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1993 Lexus LS400 acceleration stalls or surges


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Rough idle P0300

a faulty MAF will not cause a P0300, just a severe loss of power, look for injector, ignition and intake vacuum leaks as your causes.

Mar 20, 2009 | 2000 Chevrolet Impala

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99 Dodge Durango Dies When Slowing

Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Feb 09, 2009 | 1999 Dodge Durango

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