Loss of power

Tiny
TWALK
  • MEMBER
  • 2006 FORD FUSION
  • 4 CYL
  • 2WD
  • MANUAL
  • 95,000 MILES
Loss of power and sputtering. Using more fuel and is hard to maintain speed.
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Wednesday, October 19th, 2016 AT 3:27 PM

4 Replies

Tiny
AL514
  • EXPERT
How is the idle of the vehicle, just sitting still, will it stay running on its own or do you have to keep your foot on the gas pedal?
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Thursday, October 20th, 2016 AT 3:09 AM
Tiny
AL514
  • EXPERT
Is the check engine light on? This car needs to have a fuel pressure test and the ignition system needs to be checked out and tested and also the ECM needs to be scanned for diagnostic codes. You may an ignition system problem (weak spark), could be a Ignition coil problem or sensor problem. But start with a quick scan of the ECM for codes, most autoparts stores will scan it for free if you just ask.
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Thursday, October 20th, 2016 AT 3:18 AM
Tiny
TWALK
  • MEMBER
The only code was p0141. O2 sen. Bank 1 sensor 2. No other codes. Engine idling good runs. Just loss of power an sputtering every now and then.
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Thursday, October 20th, 2016 AT 3:52 AM
Tiny
AL514
  • EXPERT
Okay, well an Oxygen sensor that is stuck completely Lean will cause the ECM's fuel trim to increase fuel considerably because the ECM thinks the engine is starved for fuel, on a Volvo I have seen an O2 sensor to cause this same exact problem. The car would barely move because the O2 was stuck rich and the fuel trim was something like -100% so it was taking fuel away from the engine because it was seeing a full rich system and being fooled. Starving the car of fuel and miss firing every cylinder. You can actually check that O2 with a mutli-meter if you have one. It is really not too difficult. The O2 sensor reads only 0.1 to 0.9 volts. So not even a full volt. 0.9 volts is full rich and the lower 0.1 volts is full lean reading. You may want to change that sensor and erase the codes and go for a good long ride, but it will take a little while for the ECM to relearn the new sensor.
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Thursday, October 20th, 2016 AT 4:20 AM

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