Question about 1994 Hyundai Excel

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Car has no power when i put my foot down on the gas pedal

When i start my car the car idles very poorly and when i add gas it sounds liek its chocking and has no power to drive? is this a air sensor problem or fuel filter?

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Robie: from your description, you may have what is called a "FALSE AIR" problem. This is where air unmetered air is getting into the engine.
You have an airflow meter which is up at the area where your air filter is located. Inbetween the airflow meter and the throttle body (the part where, when you step on the gas pedal, the linkage moves a butterfly type valve open, allows air in the engine), is a large black hose. If this hose has any splits or tears in it anywhere along the way, it will allow unmetered air(air which isn't passing through the air flow meter)create a lean condition which will cause an idling problem as well as a hesitation and lack of power in general. You can also have smaller hoses along the way, which may be attached to the larger hose that are torn, split or missing. Any type of a vacuum leak can cause the symptom.
The fuel filter is not likely to be the problem.A fuel filter will usually cause the car to loose power the harder you push it but may not demonstrate a problem at idle and low speeds.
If this is not a solution, I will be more than willing to work with you to solve your problem.

Posted on May 10, 2009

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I replaced the fuel pump. but my car wont stay running unless i hold down the gas pedal. when i let off the gas it dies. what could be the problem?


The idle air control valve or the idle air control valve passages . Or you have a vacuum leak . Is your check engine light on ? Idle Air Control Valve . While there on you tube check out how to test one an how to clean air passage .
Sensor/System
?€¢
Test for conditions which cause an incorrect idle speed.


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Throttle body tampering, excessive deposits, or damage. Refer to Fuel System Description .


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Restricted air intake system


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Large vacuum leak


?€¢
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking especially between the mass air flow (MAF) sensor and the throttle body.


?€¢
Inspect crankcase ventilation valve for proper operation.


?€¢
Inspect the throttle position (TP) sensor and related wiring. Refer to DTC P0123 .


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Monitor the 24X crank sensor and the CMP sensor present parameters on the scan tool. If both are not responding, test the sensor feed circuit. Both sensors use a separate feed circuit but are internally connected to power. Test all CKP sensor A and CMP sensor circuits for intermittents. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.


?€¢
Monitor the 3X parameter on the scan tool. If the 3X is not responding, inspect the CKP sensor B and circuits for intermittents. Inspect the ignition control (IC) circuit, IC timing control circuit, low resolution engine speed signal circuit and the low reference circuit for intermittents. If these circuits become open, or shorted may not set a DTC immediately, but are capable of causing driveability complaints. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.


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Test the exhaust gas recirculation (EGR) system for proper operation. Refer to Exhaust Gas Recirculation (EGR) System Description .


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Inspect the transaxle range switch input with the vehicle in drive and the gear selector in drive or overdrive.


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Why does my saturn sound so bad when idles?


if the car is loud/noisy there is a hole in the exhaust system and this will cause a rough idle because of a loss of back pressure and the vales will not open and close properly resulting in the rough idle it also will make the engine run hotter and this will cause your spark plug gaps to increase and the spark will be less than needed to ignite the fuel in the cylinder for proper combustion which will result in poor gas mileage and lack of power is the check engine light on?

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I have a 95 f150 and it has a tendency to idle at 1100 rpms in park. i clean the idle position sensor and that didnt help. also it seems like it has no power when i drive it and i'm not getting very good...


symtoms of a bad coolant sensor. poor idle, stalling, rich mixture, retarded timing, low idle speed, cold hesitation or stumble, poor fuel milage. ( will also ****** timing ). in some cases you can unplug sensor and the pcm will compensate by running a default air/fuel ratio and in some cases allowing car to run without the sensor.Id just replace it !! if light is on, get vehicle scanned to find problem code. most all auto parts stores will scan for free, auto-zone etc. have a good day !!

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The car has no horse power, the check engine light is on and there is no problems with the computer board or co sensor


Hello, here are three of the most common causes for loss of horse power.

1. Idle air control valve. ( sometimes they can be removed and cleaned )
2. MAF, ( mass air flow ), sensor. ( sometimes they can be removed and cleaned )
3. O2, ( oxygen sensor ). ( needs to be replaced )

All three of these things are part of your emission system, and all three of these things, if faulty or dirty can prevent the EMC, ( electronic control module ), from determining the proper fuel/air mix ratio. The ratio should be 1 part fuel to 14.7 parts air. A bad fuel/air mix can cause the following.
a. Bad idle.
b. Loss of power/poor acceleration.
c. stalling/fake stalling.
d. Poor gas mileage.
e. Prevent engine from starting.

I hope this helps you.
Donnie

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2 Answers

Replaced plugs, had a tune up, replaced air filter but still idles high in p&n drive is at around 1000 p&n runs close to 2000. it also runs bad... shakes and if in drive and stopped for to long...


The first thing I would have checked is the TPS, ( throttle position sensor ), this is usually the cause of a high idle.

As far as running bad and fake stalling or stalling, there are 2 very common things that can cause that.

1. MAF, ( mass air flow ), sensor. If this is faulty you will have issues like, bad idle, loss of power when accelerating, poor gas mileage, fake stalling and stalling, eventually your engine will not start.

2. Oxygen sensors. Faulty oxygen sensors can cause very similar symptoms as the MAF.

I hope this helps you.

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My 95 Saturn SL2 1.9 will idle very lough when in drive or reverse. Runs fine at about 65mph but still has a little skip here and there. When the Air Conditioning is turned on the car will stall....


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If so you may have a bad coil/plugs/wires under load they may be breaking down they should have been replaced by at least 65,000 miles if not do a featured maintenance on the engine and replace them.

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Idles poorly


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