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When accelerating fast the engine hesitates

Changes to throttle position sensor and also have changed the fuel pump including Mass Airflow Sensor

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Did you try cheaper first lyk the fuel filter,o2 sensor,checking fuel injectors,spark plugs,as well as your fuel quality

Posted on Apr 12, 2015

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Have you tried replacing the AIR FILTER and FUEL FILTER? Both of these are restricting items that can cause this issue., If the Engine can not breath, it will not run correctly. Additionally, try adding some SEAFOAM to the Fuel Tank and this will clean up the fuel system.

Posted on Apr 12, 2015

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1 Answer

Check engine light reduce engine power and traction controll off.


It could be the APP sensors or the throttle body throttle position sensors . What DTC'S - diagnostic trouble codes . Need to test the electrical wiring , 5 volt reference voltage. Drive by Wire Function and diagnostics by Wells
REDUCED ENGINE POWER - mass airflow sensor has nothing to do with this problem .
Throttle Actuator Control (TAC)
Reduced Engine Power Mode When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
?€¢
Acceleration limiting--The control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.


?€¢
Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.


?€¢
Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.


?€¢
Forced idle mode--The control module will perform the following actions:


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Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.


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Ignore accelerator pedal input.


?€¢
Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.




Refer to
?€¢
Powertrain Control Module Description for the 4.8L, 5.3L and 6.0L engine


May 09, 2016 | 2006 Chevrolet Avalanche

2 Answers

1997 montero sr 3.5 L 4wd The truck has no acceleration. Slow start until 40 mph.


Check the cam position sensor and the crankshaft position sensor for loose connections or possibly a bad sensor. Run a diagnostic test to give you a better idea of which parts are faulty.

Dec 20, 2015 | 1997 Mitsubishi Montero

1 Answer

My fiat panda 1.2 climbing accelerator pedal is not working changed the throttle body but still no response


If this is the 3.5 Lit V6, you have an APS (Accelerator Position Sensor) and a TPS (Throttle Position Sensor) either of which could be defective but it may also need to have the mass airflow sensor changed.


trywww.manualslib.com

Dec 10, 2014 | Fiat Cars & Trucks

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Ford engine troubleshooting


have the throttle position sensor checked

Jun 13, 2017 | 2003 Ford Escape

2 Answers

Car is hesitating during acceleration


Hi there i have a 2000 v6 camaro and i just rebulit the top end of the motor over the summer my car does this same exact thing ive diagnosed it as a tps but my throttle body is all one piece and i have fly by wire system so its about 500 to replace. when its really cold in the morning it doesnt like to idle smooth also because if my coolant temp. sensor. For you i would recommend doing a compression test on all of the cylinders, checking for spark, and also check and possibly replace tps( throttle position sensor)..

Jan 03, 2013 | 2004 Ford Mustang V6

1 Answer

Is the metal flap on Maf sensor on 92 Lexus es300 supposed to move with gas pedal if car is not running? Will a bad maf cause no apart or a no start condition?


No. The metal flap in the mass aiflow sensor is not connected to the throttle control. The air moving through the mass airflow sensor moves the flap. The flap works a variable resistor inside the mass airflow sensor. The more (and faster) the air is that moves through the sensor, the farther the flap will move...that is how it measures how much air is entering the engine....that is what a mass airflow sensor does.

A bad mass airflow sensor can cause all kinds of fuel control problems that can range anywhere from a hesitation on acceleration to a complete engine no-start condition.

Apr 26, 2012 | 1992 Lexus Es 300

1 Answer

Engine Problem


first thing that comes to mind would be the throttle positioning sensor, or the mass air flow intake sensor on the air intake hose assembly.Symptoms of a mass airflow intake sensor would be very poor acceleration or engine dying when gas pedal is mashed hard. Throttle positioning sensor can give you and irradical idle while sitting still. You might want to have a scan to diagnose the problem.

Nov 24, 2011 | 1998 Saturn SL

1 Answer

I have a 1988 pontiac firebird with a 2.8 v6 fuel injected engine that displays code 32 and 34. We have changed the plugs, plug wires, rotor, and dist. cap and have also replaced the mass air flow (maf)...


Check throttle position sensor (TPS) is a sensor used to monitor the position of the throttle. The sensor is usually a potentiometer, and therefore provides a variable resistance dependent upon the position of the valve. The sensor signal is used by the engine control unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems). the cost about 50-75 bucks.

Oct 21, 2009 | 1988 Pontiac Firebird

1 Answer

1996 Ford Taurus power hesitation


If you disconnected the Mass air flow sensor the car should have die out at idle. Check fuel pump pressure at the fuel rail should be 30 psi at idle. Low fuel pressure will cause your po 171, 172, problems which could cause the other to problems. You might be needing a fuel pump and filter.

Jun 24, 2009 | 1996 Ford Taurus

2 Answers

Perfect Idle, no Codes, but stepping on gas causes hesitation


i would try cleaning mass air sensor, its mounted in air duct between air filter and throttle body, they sell the cleaner at auto parts stores, also as stated bofore make sure the intake pipe clamps are tight and it's not cracked, if that doen't fix it i would investigate a fuel pressure problem either a weak pump or problem with regulator

May 24, 2009 | 1999 Subaru Forester

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