Question about Cars & Trucks
I CHANGED THESE THING ,O2,PLUGS,WIRES,COIL,EGR VALVE ,TEMP SENSOR CLEANED THE THROTTLE BODY REALLY GOOD JUST AS I GIVE IT GAS AS I AM GOING ONLY AFTER I BEEN GOING FOR A FEW THE PEDAL ITS GOT A DEAD SPOT IN THE PEDAL BUT IF YOU GAS IT HARD FROM THE LINE ITS FINE OR IF YOU PUSH THE PEDAL HARD AT 25 YOU NEVER FEEL IT ONLY IF YOU GIVE IT LITE GAS AS YOUR GOING IT JUST GOS NO WHERE LIKE ITS GETTING NO GAS OR SOMETHING
What type of vehicle? need more information. cold okay? hot when problem is more noticeable?? possible plugged cat converter and or other possibilities..no more info..
Posted on Dec 12, 2012
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Posted on Jan 02, 2017
I had a similar problem and just happened to unplug the temperature sensor for the computer and the engine started running smooth.
So I replaced the temperature sensor and all was well!
Posted on May 19, 2010
It is best that you make a scanner to see if it gives you some code and do not keep changing parts for pleasure I recommend that if you measure the pressure of the gas pump when you feel the decision would be good for my doubts. Thanks
Posted on May 10, 2010
SOURCE: I have changed everything: Spark
There are three components that will enrich the fuel mix: 1)engine coolant temperature sensor. If this is not working or the signal is interrupted by a wire breakage then the engine will run rich. The coolant sensor informs the ECU (high resistance) that the engine is cold at start up and so the ECU responds by increasing the fuel injection cycle to enrich the fuel air mix. Later on as the engine warms the resistance of the coolant sensor drops and the injection cycle is reduced by the ECU. If the sensor is faulty or has become disconnected (wire break or corrosion of the socket pins) the ECU assumes that the engine remains 'cold' and the engine runs permanently rich. 2) O2 sensor, operates completely independently of the EGR, if it is faulty and signals 'too much oxygen' then the ECU will significantly enrich the fuel mix to try and balance what it thinks is an excess of air. 3) Fuel pressure regulator. If the diaphragm has broken or there is a leak in the vacuum line this will result in higher than needed fuel pressure in the fuel rail at idle. The vacuum line acts against the spring pressure holding the valve closed. At idle, the inlet vacuum pulls back on the diaphragm reducing the fuel pressure required to open the valve. Low fuel pressure coupled with short duration injection times will mean a lean mix at idle. If the vacuum is compromised or the diaphragm damaged then the increase in rail pressure will make the fuel mix very rich to point of flooding the engine
Posted on Nov 02, 2010
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