Question about 2003 Ford F150 Regular Cab

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2003 F-150 Super Crew

Surging and stalling at idle. No loss of power while driving. O2 sensor?

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  • Anonymous Apr 16, 2009

    1999olds alero surging at idle, does not lose power when driving

  • emmisionwoes May 02, 2009

    "Service Engine Soon" light is on. Same 2003 F150 Super Crew 4.6L Windsor. There seems to be a slight loss of power during acceleration and at a stop/idle the engine surges and, if the accelerator is not depressed just a touch, will die. It can restart but idles roughly.

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Map sensor is bad or fuel regulator

Posted on Dec 06, 2008

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Surging and dropping idle


It could be an o2 sensor. When you are unplugging your battery it causes it to rereset and loose its memory. If the o2 sensor is going out it can cause false readings leading the problems you stated. You can take it and get it scanned you can do what I did and go ahead and replace all my o2 sensors. I figured since one when out, the rest wouldn't be far behind.

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Pontiac Aztek 2001 - 3.4l (non-GT); Codes: P0135, P0141, P0420 all O2 + Converter. Ideas on problem?


P0135 bank 1 sensor 1 open or short in wires,bad connections,bad sensor ,or bad ecm. P0141 bank 1 sensor 2 same diag as P0135. P0420 cat below threshold open or short, or faulty Ho2s sensors.you may have several problems. start with sensors circuit if good change sensors if not trace to ecm if reading not right replace ecm if all good replace sensors clear codes retest drive two drive cycles for cat to clear tests. then with no dtcs present test fuel pressure , injectors,then ignition system ,timing valves ,map,maf sensors,throttle sensor,crank sensor cam sensor, compression.

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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.
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I have a 2001 Audi Avant that that surges, especially when stopped at a light. It threatens to stall unless I rev the rpms. Could this be related to oxygen sensors?


normally o2sensors will not cause this type of run problem surging can be caused by vacume leak or idle control valve

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