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1998 Zetec 1.25 DEAD spot under acceleration, When I accelerate between 2000-3000rpm the car just looses all its power if I keep the accelerator pedal down it eventually gets its self going, Theres a dead spot there I did a service in anyways OIL,OIL Filter, Fuel filter(Thought it could be the problem) I had a look at the plugs they look good and at the throttle body it seems clean inside, Any solutions as to what it can be?

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Check and clean the Idle Air Control Valve motor on top of the engine. Use Goo Gone (mineral spirits or turpentine) with Q-tips to clean out any sludge and replace it after letting the part air dry for about 10 minutes (flammable liquid). You may also be able to tab this item hard with a screwdriver without removing it if you just need a 'temporary"
fix to get you down the road. Also, you will want to check for pinholes or soft squishy rubber hoses between the motor and PCV valve in the crankcase. Any hole in that hose route will cause vacuum loss, stalling, erratic idle, etc.

Posted on Aug 05, 2010

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Most likely the throttle position sensor or Mass Air Flow sensor

Posted on Aug 05, 2010


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1999 Chevy Metro LSI Loss of acceleration power, on take off only. I have no acceleration power up to the speed of 10 - 15 MPH, after that the car runs fine.

Could be a dead spot in the tps or maybe it needs adjusting.
here is a procedure to adjust:

0900c152800488e3-j1axptdruxmkgupulmd503d3-4-0.gif . Fig. 1: Throttle position sensor testing
  1. Connect a digital multimeter to the throttle position sensor terminals 1 and 2. Measure resistance.
  2. Insert a 0.012 in. (0.3mm) feeler gauge between throttle stop screw and throttle lever.
  3. With retaining screws loosely installed, turn throttle position sensor fully clockwise, then slowly counterclockwise until digital multimeter indicates 0 ohms (continuity).
  4. Tighten screws to 18 inch lbs. (2 Nm).
  5. Insert a 0.035 in. (0.9mm) feeler gauge between throttle stop screw and throttle lever. Digital multimeter should now indicate an open circuit (no continuity).

Aug 20, 2017 | Cars & Trucks

1 Answer

2008 zetec Focus 1.8, slight miss fire when accelerating in fourth gear, pulling onto motorway yesterday and tried to accelerate and it was as if something was holding me back

A miss under load on a Focus is usually a bad or failing coil on one or more of the plugs.Also how old are the spark plugs?

May 08, 2017 | Cars & Trucks

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My 01ford focus zetec lacks power on hills and accelerating. New gapped plugs, coil and harness, MAF sensor. Have new EGR, keep swapping old and new, improves performance temporarily.

check fuel pressure with a gauge as well as fuel volume. pressure should be around 35 lbs and the volume should be about 1 litre in 30 seconds. if its not then this can cause poor power going up hills and accelerating. how long has it been since the fuel filter was changed.

Aug 05, 2014 | Cars & Trucks

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Starts missing /large dead stop when accelerating

The missing while accelerating is likely due to ignition coils and/or spark plugs going bad. The missing while in park is a normal thing. The car has a rev limiter that will not allow the engine to rev to higher than 3000 RPM while in park.

Apr 11, 2014 | Lincoln LS Cars & Trucks

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The car will run fine for about 10 minutes then it will stop accelerating???



It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?


Loss of acceleration?


Headlights flickering and car hesitates to start?


How exactly the Vehicles Accelerator Cable works?


How exactly Vehicles Accelerator Pump Diaphragm Works?


2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?


2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?


Wheel hop under hard acceleration?


2009 Chevy impala accelerator pedal sensor?


Nissan Pathfinder stalls and bucks on Acceleration?


Acceleration lag problem?


These details will help.


Nov 28, 2012 | 1999 Mercury Cougar

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My car starts but will not accelerate, when accelerator is press car dies

many things could cause that first you have to check accelerator cable.second the fuel goes through the filter easily(fuel pump) ,plugs,.And is the car coil system and throttle sensor .

Nov 01, 2010 | 1998 Toyota RAV4

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98 Ford Fiesta Encore engine cut out & lagging acceleration

well it sounds like its time to change the timing belt.

Jul 12, 2010 | 1998 Ford Escort

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2001 Ford F650 with 7.2 Cat deisel acceleration problem

Check your TPS Throttle positioning sensor. Sounds like it has a dead spot in it or it is failing. May also be a wiring harness issue or loose connection at TPS too! If its intermittent then it will soon go out completely. It should be located on your fuel pedal. Remove it and check it with an ohm meter. Check resistance all the way thru from 0-100 percent. When it is not working it should do nothing and show no resistance. When it is working the resistance value will increase and or decrease as you turn the sensor.

Feb 21, 2010 | 2001 Ford Super Duty F 450

1 Answer

95 ford mustang

The throttle positioning sensor can do this to your car. Have it checked out voltage wise A flat spot will affect drivability

Jan 17, 2010 | 1995 Ford Mustang

1 Answer

Have a 2000 ford focus I need to know how to replace the accelerator cable .It's a duel cam engine the 8th digit on the vin is a 3 if this helps at all.Is this a dealer part or do any auto parts carry

get part at discount from
Please arte higly if this helps.

SECTION 310-02: Acceleration Control 2000 Focus Workshop Manual
REMOVAL AND INSTALLATION Accelerator Cable —2.0L Zetec-E Removal
  1. Disconnect the accelerator cable.
    1. Remove the accelerator retaining clip.
    1. Disconnect the accelerator cable.
  1. Detach the accelerator cable from the bracket.
    1. Rotate the cable to release.
    1. Detach the accelerator cable.
  1. Remove the footwell trim panel.
  1. Disconnect the accelerator cable from the pedal.
  1. Attach a draw cord to the accelerator cable to assist with installation. (Important)
  1. Remove the accelerator cable.
  1. NOTE: The rubber grommets must be installed into the bulkhead and throttle body bracket before the accelerator cable is installed into the grommets.
    To install, reverse the removal procedure.

May 03, 2009 | 2000 Ford Focus

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