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D16y4 engine wont start when cold unless you keep accelerator depressed. i think it may be the cold stsrt sensor on throttle body

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Posted on Jan 02, 2017

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SOURCE: 1997 dodge ram 1500 stalls when driving

check vacuum hose into throttle body, also clean throttle body orifices and iac. remove iac [engine off] and have someone turn key to on to see if plu8nger works. just a thought .

Posted on Dec 25, 2008

  • 64 Answers

SOURCE: 1999 volkswagen stalled

first check cylinder 1 , spark plug, ht leads, coil,

then clean the trottle body with carb cleaner

if that does not work replace the throttle body, comes complete, and do a basic setting on it with diagnostic machine

Posted on Feb 19, 2009

  • 4 Answers

SOURCE: need a 03 3.0 v6 awd throttle body, linkage, sensor

Buy it new from many places Search Saturn Parts call local Dealer .
Happy Easter

Posted on Apr 11, 2009

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SOURCE: rpm shoots up to 3500 dwn to 1500 up again down again .

scan it check tps sensor.also check for sticking throttle linkage.also check idle speed control.

Posted on Jul 17, 2009

  • 38 Answers

SOURCE: 1989 Chevrolet C1500 with 5.7L V-8. Engine dies

fuel pump is working but when accelerating it doesnt pump enough fuel up to the engine then it will fall on its face if it is a electric pump you may have to drop the tank if it is inside and replace it if it is on the engine replace it thats what is exactly wrong with it

Posted on Jul 31, 2009

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Hi 04 kia sedona 2.9 will not start unless you use easy start then it turns of over a lot before the engine it will start. once running the engine is ok this happens hot or cold.


I would start by pulling a spark plug and seeing if it is fouled. If all plugs are good, check for a clogged air filter or improperly functioning throttle body. Remove the air intake assembly and have someone press the accelerator with the keys in the ACC position. When the accelerator is fully depressed, the throttle plate should open to almost 90 degrees, when the pedal is released, it should close very quickly. If it doesn't, your throttle body will need to be replaced.

May 12, 2016 | Kia Cars & Trucks

1 Answer

2005 Mustang GT idleing problem


may be it the problem of another throttle body.also check the ignition switch.

Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...

Aug 25, 2008 | 2005 Ford Mustang

2 Answers

Car wont start during cold winter mornings


Clean throttle body and change fuel filter.

Jan 28, 2016 | Cars & Trucks

1 Answer

1995 Buick LeSabre 3.8 Liter Wont start unless I push down on gas pedal like it wants more gas, Why? Runs OK when running


Possibly a bad or dirty Idle Air Control motor. The engine computer controls the operation of this motor to control idle speed. A pintle on the motor extends and retracts, according to signal from the computer. The pintle controls an air passage below it to give or take away air during idle -when the throttle shaft is closed, no air will get into the engine through the throttle body except through the idle air passage . The IAC motor or valve is on the throttle body, with a 4 wire connector. Take it off and look for carbon or coking deposits around the valve's pintle, and in the air passage beneath it. With the idle valve off, plug the connector back on it, then watch the pintle as the key is turned to on. If there is no movement whatsoever, the motor is probably bad.

I have also heard that a bad coolant temperature sensor can cause such a hard start. If the computer does not know the engine is cold, it won't put enough gas into the cylinders for easy starts. The engine needs more gas to start and run when cold.

Sep 13, 2014 | 1995 Buick LeSabre

1 Answer

Engine wont start, unless I push the gas pedal and keep my foot on it.?


Could be a dirty throttle body, or a stuck idle air control valve.
Is the check engine light staying on now ?

Apr 23, 2013 | Toyota Highlander Cars & Trucks

1 Answer

Have 2006 gmc canyon having trouble with it staying on.3.5 engine starts up,stays on a few seconds then shuts off shows reduced power on panel.won't crank over .have to wait a few minutes then it


REDUCED POWER
Refer to:
• Powertrain Control Module Description for the 2.8L engine
• Powertrain Control Module Description for the 3.5L engine

Throttle Actuator Control (TAC) System
Throttle Actuator Control (TAC) Overview
The throttle actuator control (TAC) system uses vehicle electronics and components to calculate and control the position of the throttle blade. This eliminates the need for a mechanical cable attachment from the accelerator pedal to the throttle body. This system also performs the cruise control functions as well.
The TAC system components include, but are not limited to the following:
• The accelerator pedal position (APP) sensors
• The throttle body
• The powertrain control module (PCM)
Each of these components interface together to ensure accurate calculations and control of the throttle position.

Accelerator Pedal Position (APP) Sensor
The accelerator pedal position (APP) sensor is mounted on the accelerator pedal assembly. The APP is 2 individual APP sensors within one housing. There are 2 separate signal, low reference, and 5-volt reference circuits. APP sensor 1 voltage increases as the accelerator pedal is depressed. APP sensor 2 voltage decreases as the accelerator pedal is depressed.
Throttle Body Assembly
The throttle body for the throttle actuator control (TAC) system is similar to a conventional throttle body with several exceptions. One exception being the use of a motor to control the throttle position instead of a mechanical cable. Another exception is the throttle position (TP) sensor. The TP sensor is mounted in the throttle body assembly. The TP sensor is 2 individual TP sensors within the throttle body assembly. Two separate signals, low reference, and 5-volt reference circuits are used to connect the TP sensors and the powertrain control module (PCM). TP sensor 2 signal voltage increases as the throttle opens. TP sensor 1 signal voltage decreases as the throttle opens.

Reduced Engine Power Mode
When the PCM detects a problem with the throttle actuator control (TAC) system the PCM enters one of the following Reduced Engine Power Modes:
• 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.
• Forced Idle Mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned OFF.
- Ignore accelerator pedal input.
• Engine Shutdown Mode--The control module will disable fuel and de-energize the throttle actuator.

Have you had it checked for DTC'S - diagnostic trouble codes ?

DTC P2176
The commanded throttle position (TP) is compared to the actual TP. Both values should be within a calibrated range of each other. The powertrain control module (PCM) continuously monitors the commanded and actual TPs. If the values are greater than the calibrated range, DTC P2176 sets.
--------------------------------------------------------------------------------
DTC P2138
The accelerator pedal position (APP) sensors 1 and 2 are located within the accelerator pedal assembly. Each sensor has the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
This provides the powertrain control module (PCM) with a signal voltage proportional to accelerator pedal movement. The APP sensor 1 signal voltage at rest position is near the low reference and increases as the pedal is actuated. The APP sensor 2 signal voltage at rest position is near the 5-volt reference and decreases as the pedal is actuated.
DTC P2135
The throttle actuator control (TAC) assembly has 2 throttle position (TP) sensors mounted within the assembly. The powertrain control module (PCM) provides individual signal, ground, and 5-volt reference circuits to each sensor. Both sensors operate within a voltage range between 0.35-4.65 volts. When the throttle is opened from 0-100 percent, one sensor signal voltage increases while the other decreases. The signal circuit for TP sensor 1 is referenced to ground, and the signal circuit for TP sensor 2 is pulled up to 5 volts within the PCM.
DTC P2128
DTC P2127
DTC P2125
DTC P2123

Drive by Wire Function and diagnostics by Wells

May 25, 2017 | 2006 GMC Canyon

1 Answer

1996 gmc k1500 4x4 5.7 vortec motor no start keep


Replace the coolant sensor on the front of the intake manifold.The coolant sensors on this engine does go bad and wont set a check engine light. The sensor will read about -32 to 0 degrees when they do go bad. The computer thinks it is that cold and sends tons of fuel to the engine. If you try to start the engine with the throttle depressed to the floor it puts the fuel system in clear flood mode and wont fire the injectors. Engine will start then and run very rich. The coolant sensor has two wires on it and sometimes you need to replace the wiring pigtail going to it as the sensor can seep coolant into the connector and corrode the terminals. All the parts are available at pepboys and autozone or napa. Good luck

Jan 05, 2010 | 1996 GMC Sierra

2 Answers

1997 dodge ram 1500 stalls when driving


check vacuum hose into throttle body, also clean throttle body orifices and iac. remove iac [engine off] and have someone turn key to on to see if plu8nger works. just a thought .

Dec 18, 2008 | 1997 Dodge Ram 1500 Club Cab

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