Question about 2000 Ford Focus

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Loss of power when hard accelorating , seems to faster on 1/2 throttle than on full, holding back

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Sounds like the oxygen sensor is giving up. start of by replacing the spark plugs, and if not check the oxygen sensor

Posted on Jul 13, 2009

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Is the car a standard? Meaning is it a stick shift? If not;

When was last time you had a tune up?

Change oil, spark plugs, wires, rotor cap and distributor?

Posted on Jul 13, 2009

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1 Answer

When driving my 1997 Audi A 4 1.8t there is a loss of power around 3000 rpm, what could be causing the issue?


run the fault codes and look for a problem area in the vane actuator of the turbo
it could be a sensor problem or a MAP sensor problem
this is indicated by the pressures being generated or not generated by a turbo generating pressure from the throttle opening on acceleration or held at constant speed

Oct 19, 2015 | Audi Cars & Trucks

1 Answer

Where is the throttle body located?


old post , and great question

the TB is a thing that contains the AIR throttle, the body holds

that TV throttle valve (or some call it a TP throttle plate)

this car has 6 engines, and varies by country. what country>?

what engine? (USA cars have a hood EPA tag, it states the engine)



sure cleaning it can help and for sure with throttle by wire.

the body gets full of EGR/PCV crap. (called GUNK) and if not

removed on high mileage cars, it jams the silly throttle by wire

motor. (and related\'s)

why not scan the PCM and SEE ALL DTC errors.

that be first. !!!



loose power has many causes, up to 50.

why not scan it first, (the CEL lamp to me is useless , unless stuck on)

scan it first.

this engine has many limphome modes (suzuki failsafe)

and will run slow. in limp mode.

scan it.

the TBW , throttle by wire has it\'s own limp mode.

the transmission too, and others.



The TBW has up to 4 TPS sensors. 2 on the foot and 2 in the TB

if ANY of the 4 , do not AGREE, you go to LIMP HOME MODE>

or end up like a Toyota and huge class action lawsuits.



loss of power, not transmission caused, (slips or skips gears)

is engine power loss.

cause by (top ones of 50)

1: never getting a tuneup. and for sure the 60k mile.

2: misfire, caused by 3 major things. ask.

3: flooding.

4: bad spark see #1

5: clogged air filters see #1

6: clogged fuel filter.

7: weak fuel pump.

8: and the big one is loss o f engine compression for huge list of causes.

9: not scanning the PCM and believing what it told you. !!!

Jun 21, 2014 | 2007 Suzuki Forenza Sedan

1 Answer

I have a 04 hd2500 reduced power problem,my mechanic put accelorator sensor then a throttle body. then the wiring harnes for tb, and i still have reduced power problem. help!!!


try wiggling the wires in the accelorator sensor connector.sometimes the wires break inside the insulation and it is real hard to find.they usually break from 1 to 4 inches from the connector.if you dont find the problem there i would disconnect the computer and see if there is corrosion in the connectors.i have seen this happen to.hope this helps.good luck.

Mar 30, 2011 | Chevrolet Silverado 2500HD Cars & Trucks

1 Answer

When pulling off at full throttle asr activate light comes on gaspedal kicks back car does not perform loss of power verry week 92 corvette LT1


Anti Slip Regulator,stops the wheels from spinning due to too much throttle,it will feel like a sudden loss of power but its doing its job.
In Europe,some makes have a switch to turn it OFF,

Sep 08, 2010 | Chevrolet Express Cargo Cars & Trucks

1 Answer

My 1.8d non turbo ford escort looses power quicker than it should


if this is a manual gear change,it sounds like your clutch is slipping

Aug 10, 2009 | 1993 Ford Escort 4 Door

2 Answers

Loss of engine power


Check wiring around the throttle motor assy on the top of the engine. This harness sometimes rubs through on hot engine surfaces.

Jul 02, 2009 | 1997 Pontiac Grand Prix

1 Answer

Stiff accelorator pedal


It is either the cable that goes from the pedal to the throttle body, or the throttle plate is sticking.

Mar 30, 2009 | Hyundai Motor 1998 Accent

3 Answers

88 Nissan z24i backfires through throttle body and loses power when in gear


Check your intake and exhaust modules. I have a 1987 D21 and had the same problem (if I understand your post). I replaced the modules located behind the driver side headlights and it fixed the problem. Good luck! I hope this helps.

Nov 04, 2008 | 1987 Nissan Pickup

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