Car loses acceleration

engine losing power sign ??? .You mean ENGINE POWER REDUCED ? This has to do with electronic throttle control -Throttle Actuator Control (TAC) System Description

The throttle actuator control (TAC) system is used to improve emissions, fuel economy, and driveability. The TAC system eliminates the mechanical link between the accelerator pedal and the throttle plate. The TAC system eliminates the need for a cruise control module and idle air control motor. The following is a list of TAC system components:
• The accelerator pedal assembly includes the following components:
- The accelerator pedal
- The accelerator pedal position (APP) sensor 1
- The APP sensor 2
• The throttle body assembly includes the following components:
- The throttle position (TP) sensor 1
- The TP sensor 2
- The throttle actuator motor
- The throttle plate
• The engine control module (ECM)

TAC System Default Actions/Reduce Power Modes
There are 2 reduce power modes that the engine control module (ECM) can default to if an error is detected in the throttle actuator control (TAC) system. If an accelerator pedal position (APP) sensor 1 or APP sensor 2 circuit fault, throttle position (TP) sensor 2 circuit fault, or if a TP sensor 1 circuit fault is detected with some APP angle, the ECM goes into one of the 2 reduce power modes. In this mode, the engine torque is limited so that the vehicle cannot reach speeds of more than 100 km/h (60 mph). The ECM remains in this reduce power mode during the entire ignition cycle even if the fault is corrected.
If there is a condition with the throttle actuator control circuits, throttle actuator command vs actual position fault, return spring check fault, or a TP sensor 1 circuit fault, the ECM goes into the other reduce engine power mode. In this mode, the engine speed is limited to 2,500 RPM and the 3-6 fuel injectors are randomly turned OFF. At this time the Reduced Power indicator is commanded ON. The ECM remains in the reduce power mode during the entire ignition cycle even if the fault is corrected. Observe, if a TP sensor 1 or throttle actuator control circuit fault is present at the time the vehicle is at idle, with no accelerator pedal angle, the engine may stall.
© 2022 General Motors Corporation. All rights reserved.

You need to have a qualified repair shop check it out.

In my 2000 sebring I would be driving and lose power no throttle response,everything else still on. It was the crank sensor. Went to auto zone for free scan and that was one of the many that came up. Replaced and everything ran great after that.

have the computer fr-flashed and see what happens

That doesn't mean it's losing compression. It can only possibly lose compression from internal wear or sticky valves or stretched timing chain or catastrophic failure - it can't lose compression one moment, then regain compression the next moment except in cases of sticky valves or stretched timing chain.

I doubt you have any of these issues, unless your car is pretty badly worn. What's happening is your car has lost most of its POWER, not compression.

At any rate... if it's a modern car, get the computer's error codes with an OBD (if pre-1987) or OBDII (1997 and later) scan tool. If no codes or engine older than about 1987, suspect poor or old gasoline, fuel pressure or flow rate, clogged air filter, weak coil, plugged exhaust, various ignition-related issues, park brake set, accelerator linkage, serious mechanical problems (wheel bearings, etc). This isn't a question that warrants a quick "silver bullet" answer, there are TONS of things that might cause you to lose the ability to accelerate.

What did you do with tune up?

Did you ever fix the problem I have a 2005 focus and its doing the same thing

im a tech in the bronx and i dealt with the same code for the misfire. burt i realized that there wasnt any power to the coil of #2 cylinder. I replaced the sensor mounted on top of the air filter box, which solved this problem.

Have the same year/engine truck and had same problem. Dealer fixed with an accelerator pedal position sensor. I think the part was about $300 and labor about $200...was warranty about 4 yrs ago, so not positive on prices. Also had no warning lights/no codes.

try to change your fuel grade and see

The first step check the spark wires and sparks the correct gap of theses sparks is 1.0-1.1mm