[Subaru impreza 2004 lazy engine, lack of power]

Good Day Everyone, I recently joined this site, I have visited before and had a lot of help when working on my subaru. I own a subaru impreza TS 1.6l non turbo, automatic. Its not that fast! but it is used as a family car and it does the job. Recently however I noticed the engine was losing power - slow uphill and acceleration. So i decided a tune-up was in order.

 

I changed the oil, oil filter, spark plugs, transmission fluid, air filter. This did NOT improve or solve the performance issue. After a while the check engine light came on. I normally work on the car myself but I do not own a diagnostic scanner so I took the car to a mechanic. The mechanic told me the O2 sensor was faulty so I had it replaced. The check engine light came off but came back on after 2 days.

 

Replacing the O2 sensor did not solve the problem, the car still struggles to get up hills and accelerates very very slowly. A few weeks after I took the car to another mechanic, he scanned the car and told me to replace the spark plugs and wires. I did, and the problem still was not solved.

 

Tired of the problem, I took steps to fix the problem myself, I cleaned the throttle body, had the injectors cleaned and replaced the fuel filter, the problem still was not resolved. 

 

 

So in a nut shell - Car engine - lazy

 

Replaced-

engine oil

oil filter

spark plugs

spark plug wires

o2 sensor

air filter

fuel filter

transmission fluid

cleaned throttle body

 

 

So now i'm here, asking- please can someone help!!??