Question about 1992 Geo Storm

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Where do I start when looking for a bad air mix?

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Check air filter first off or replace it , check wires on the oxygen sensor in the exaust theres also a mass air senson on the intake.
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Posted on Nov 19, 2009

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Wind sheeled steams up

Hello Larry,

Usually this is caused by the heater core going bad, causing antifreeze to mix in to the air. The next thing to look for is the leakage on the passenger side and/or a weird kind of smell inside your vehicle.. Your heater core will possibly need to be replaced.

Nov 19, 2012 | 2003 Pontiac Bonneville

1 Answer

The expedition is having a hard time starting, and is turning over longer than normal.

If the vehicle runs normal once started you may have a bad oxygen sensor and/or air sensor. Since you're under the hood might as well check the air filter. Vehicles need 3 things to start. Fuel, Electricity and Air. A bad sensor will limit fuel delivery. A dirty filter limits air intake. A faulty sensor will send mixed signals to the computer.

Feb 28, 2011 | 2004 Ford Expedition

1 Answer

Will start and run only if you hold down the accelerator. as soon as you let off of it it will die

It sounds like you may have a faulty MAF, ( mass air flow sensor ).
The ECM, ( electronic control module ), should set the fuel/air mix ratio at 1 part fuel to 14.7 parts air. A faulty MAF can prevent the computer from determining the proper fuel/air mix ratio, and that can lead to bad idle, poor acceleration, fake stalling and stalling. Eventually it can prevent the engine from starting.

I hope this helps you.
Thanks for using Fixya!

Feb 18, 2011 | 2001 Nissan Maxima

2 Answers

My kia puts out blue white smoke when i start it in the morning and sometimes during the day when i start it. Its a Kia Soerento GLS 2.5 and it seems to be using oil through this problem.

burning oil
probably valve guides worn a little .when stopped a slight amount of oil gets on pistons and burns off when engine started hence the smoke

Feb 02, 2011 | Kia Sorento Cars & Trucks

1 Answer

Engine light is on

This is my best guess without knowing the yeay and model, but these issues are very common among many vehicles.

There are many things that can trigger your engine light, here are the 3 most common in the order of likelyhood that I would have checked as soon as you can.

1. Dirty air filter. ( this often causes a bad fuel/air mix ratio. The air filter is the engine's lungs.)

2.( MAF), "mass air flow " sensor. ( A faulty MAF can cause rough idle,stalling, and even prevent the engine from starting, particularly in cold weather. This can also cause a very poor fuel/air mix ratio.)

3. Oxygen sensor. ( This also effects the fuel/air mix ratio ),

I hope this helps you.

Feb 02, 2011 | Toyota Camry Cars & Trucks

1 Answer

My 1998 oldsmobile silhouette sometimes just cuts off sitting in traffic, any ideas/solutions???

Here are 3 very common causes for an engine stalling.

1. Old air filter, ( if it's old it restricts the engine from getting vital air.)

2. Oxygen sensor, ( if this part is bad the computer is unable to determine the proper fuel/air mix ratio and often leads to stalling.)

3. MAF, ( mass airflow ), sensor. Similarly can cause bad fuel/air mix ratio, and often leads to stalling. This can also reach a point of causing your engine not to start, particularly in cold weather.

I hope this helps you.

Jan 31, 2011 | 1998 Oldsmobile Silhouette

1 Answer

96 Cavalier. "sometimes" wont start

The fact that you get enhanced ignition by physically enriching the fuel air mix indicates that the normal mix is too lean, either too little fuel or too much air. 1) Check for leaks of un-metered air in to the air ducting and inlet manifold. Look for cracks and poor joints to all vacuum lines including the evaporative emission recovery lines. 2) Check that the EGR valve is closed off at start up: this should stay closed until engine has warmed up. 3) Finally check that the coolant temperature sensor is working OK; the sensor should be informing the ECU that the engine is cold and the ECU responds by ensuring an enriched fuel mix (by prolonging the injection cycle) during engine warm up.

Jul 26, 2010 | 1996 Chevrolet Cavalier

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Truck will start fine but if i drive it to say

Sounds like a problem with the idle air control valve on the throttle or an air leak into the inlet manifold. When the engine is cold the temperature sensor informs the ECM that the engine needs a richer mix to get started and to keep running. Once the engine is warmed up and the coolant sensor informs the ECM of that fact, then the fuel/air mix s set to the normal leaner balance. When you stop the hot engine and restart it the ECM is still seeing a hot engine and the idling is now very dependent on the idle air control valve for maintaining a sufficient running mix. If there is an air leak into the air ducting or inlet manifold the hot air under the hood will sucked in first. The ECM cannot sense this un-metered hot air and so the fuel mix is tool lean to fire. If it is the IAC there is an additional diagnostic to confirm if it is at fault. When the engine is running and the truck is stationary do you notice that when you turn the steering wheel (engage the power steering) that the engine badly falters and drops in revs for a second or two. If this is the case it looks like IAC valve is not functioning properly. To fix: 1) remove the air ducting from the front of the throttle and clean the throttle interior and plate until like new. 2) locate the IAC, its often on the throttle body and is a small device held on with a couple of bolts with an electrical connection to it. 3) Disconnect and unbolt and again clean thoroughly Check the two ports on the throttle body exposed by the removal of the IAC and clean these. Reassemble and it should work OK

Jul 16, 2010 | 1993 Dodge Dakota

1 Answer

Air fuel mix too rich, what are my possble

well could be a o2 sensor could be throttle possition sensor, coolant temp sensor, could be a bad injector,map sensor, maf sensor, could also be a vacume leak hope this helps its a starting point anyway

Aug 15, 2009 | 1994 Toyota Camry

1 Answer

2004 Odyssey, heat and A/C do not work unless van in motion

Since warm air eventually comes out when the vehicle is in motion, you may have an air mix door that is stuck in fresh or is somehow blocking warm air from the heater core.

To see if the air mix control motor is bad, you need to retrieve your Diagnostic trouble codes (DTC's) from the heater control panel. To run the diagnostic function, do the following:
1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirc control button to select Recirc (recirc light on.)
4. Press and hold the recirc button to select Fresh (recirc light off) and continue to hold the button down until the recirc light comes on for two seconds and then goes off.
5. If the system is okay, the recirc light stays off.
6. If there is a problem, the recirc light blinks the DTC to indicate the trouble. One blink=a problem in the air mix control motor circuit. Two blinks=problem in the mode control motor circuit
Three blinks=problem in evaporator temp sensor circuit.
7. Turn the ignition switch off to cancel the self diagnosis function. Run the diagnostic again after repairs are complete.

Note: the air mix control motor has a rod which connects to a plastic link. The link controls the mix doors and also connects to the heater control water valve via a cable. The air mix motor may check okay, but if the link is broken then you will still have problems. the motor is on the bottom of the heater unit in the front passenger's foot well.

May 10, 2009 | 2004 Honda Odyssey

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