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Power of my car is decreased.

Tiny
HOOMANP_MECH
  • MEMBER
  • 2013 ALL OTHER MAKES ALL OTHER MODELS
  • 1.5L
  • 4 CYL
  • FWD
  • MANUAL
  • 20,000 MILES
The car has traveled 30000 km. The sound of motor is more than last situation and in low and hi speed the power uniformly is low.
In 4000 km suddenly power decreased without any check light, error in computer and reason. I replaced MAP sensor and the problem fixed and power increased for 2000 km. Then same as before, the power decreased and I replaced this items: ECU, velocity sensor, totally disk and clutch, sparks, gasoline strainer, air filter, motor oil, but no change occurred. Then in 18000km change MAP sensor and oxygen sensor and power increase unfortunately only for 1000 km and until now no improve has been seen. There is problem in wiring? In throttle sensor? In spark wires? This is a mystery!
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Monday, March 9th, 2015 AT 10:13 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
From your description we don't' have that car in US so no info but scan for codes and check fuel pressure with a gauge.
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Tuesday, March 10th, 2015 AT 6:14 AM
Tiny
HOOMANP_MECH
  • MEMBER
  • 2 POSTS
Thank u, but the fuel pre sure is cheked and also there is no error related to scanning codes.
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Wednesday, March 11th, 2015 AT 2:24 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Then check vacuum at intake if 15" or below at idle then suspect a clogged exhaust
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Wednesday, March 11th, 2015 AT 7:48 AM

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