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Throttle randomly cutts out when accelorating,

Throttle randomly cuts out when accelerating, then idles very rough until i restart the engine then runs like new until it happens again. spent $530 at dealership for new throttle body and I still got the exact same problem. please help!!!!

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  • Jamie May 11, 2010

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1 Answer

Hesitates on acceloration


Clean the throttle body and the idle air control motor. Pull the Idle motor and clean it with a brush and pick. Use brake clean. Get as much black/carbon off of it as you can.

Sep 04, 2014 | Cars & Trucks

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Why are so many trouble diagnostic codes being thrown


sounds like you speed sensor and your throttle poistion sensor

Sep 02, 2014 | Cars & Trucks

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What is code p0300?


P0300 - Random, Multiple Cylinder Misfire Detected Fault Code Definition
  • Random, Multiple Misfire Detected
Symptoms
  • Check Engine Light flashing
  • Rough running, hesitation, and/or jerking when accelerating
  • In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in fuel economy
Common Problems That Trigger theP0300
  • Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable)
  • Incorrect ignition timing
  • Vacuum leak(s)
  • Low or weak fuel pressure
  • Improperly functioning EGR system
  • Defective Mass Air Flow Sensor
  • Defective Crankshaft and/or Camshaft Sensor
  • Defective Throttle Position Sensor
  • Mechanical engine problems (i.e.-low compression, leaking head gasket(s), or valve problems

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Fuel system running rich and stalling


Sounds like it is slightly out of time.

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1993 festiva replaced the throttle body gasket now will not accelerate at temp


I have a 1997 ford E 150 customize mark 3 van have driven back and forth to work 5 years ran great Christmas Day drove down to the garage and back up to house and now it will not start turns over has spark will not fire

Jan 07, 2014 | 1993 Ford Festiva

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My 1993 Ford Festiva 1.3L occasional engine hard start, sputters on start up then runs fine, but sometimes has a slight "cut out" on gentle acceleration, problem clears up but comes back at lower speeds....


sound like your throttle positioning sensor or even yhe throttle it self it is electronic as far as i know the tiny metal bands come of and if the reading from the pedal sensor is incorect fuel shut of wil ocure

Sep 17, 2013 | Ford Festiva Cars & Trucks

1 Answer

94 s10 4x4 4.3L TBI. rough idle and power loss


IAC valve @ throttle body regulates the air/fuel idle. its right in front of the throttlebody, replace it, MAP sensor works together with IAC, both could be your problem. everything else you did is good, I feel these items are necessary to put you back in bussiness, just do it !!!

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1 Answer

Engine does not idle when accelorator is released


Try this service.

Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Jun 25, 2012 | Cars & Trucks

1 Answer

Unstable RPM - is this also a safety issue??


yes here is the common problem

Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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1 Answer

Engine runs rough after about ten minutes /idles really low


Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.

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