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Codes p0121 I replaced the fuel pump but the car does not stay running

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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phoenixinks
  • 89 Answers

SOURCE: replaced the fuel pump and wont stay running. do i need to reset?

check the fuel filter. after that start working your way towards the injectors checking everything along the way

Posted on Jan 14, 2009

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SOURCE: fuel pump noise smell gas while car is running 92 mustang

the pump should stop when it builds up to the correct pressure. if it continues to pump and you smell fuel then you probably have a fuel leek. normally fuel consumption will increase with a leek, even slightly.

Posted on May 03, 2009

venexcsd
  • 1185 Answers

SOURCE: fuel pump stays running after car is turned off. battery stays dead have to get jumped to start car.

The only way the pump will run is if it has a live 12v dc supply to one side and an earth return to the other.

Most cars have the earth side of the pump grounded down to the chassis so I would go for the fact that you have a short on the loom or a faulty ignition barrel.

An auto electrician would isolate the pump wiring to see where the feed was coming from then repair the fault

Posted on May 25, 2009

  • 395 Answers

SOURCE: 1993 pontiac bonneville fuel pump problem

It could be that you have picked up a batch of dirty fuel that has clogged the gauze input filter that is part ot the fuel pump inside the fuel tank.

Posted on Jul 30, 2010

tayjoejoe
  • 2194 Answers

SOURCE: my car will crank but won't stay running, i

Could possibly be the anti theft system. This system can actually turn off your fuel injectors 1-5 seconds after starting. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on May 29, 2011

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1 Answer

What can cause the check engine light to be on?


Circuit Range Performance error.

When is the code detected? Malfunction is detected when an excessively low or high voltage from the sensor is sent to ECM. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) P0121 CHEVROLET Description The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

Read more: https://www.autocodes.com/p0121_chevrolet.html


https://www.autocodes.com/p0121_chevrolet.html

chevrolet code was P0121 Google Search

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My 99 chevy silverado truck wont stay running and back fires


The P0141 means O2 Sensor Heater Circuit (Bank 1 Sensor 2)
The P0121 means Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
The P0200 means Injector Circuit
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Hope them can help you! Good luck!
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P0322,P1544,P0121


The fault code P0322 means "Ignition/Distributor Engine Speed Input Circuit No Signal"
The P1544 means "Seat Direction Switch Assembly Circuit Open"
The P0121 means "Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem"
when you know the code, you can most likely repair it yourself.
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Just replaced the fuel pump, now we get the code P1544, Mfg. Specific DTC, see service manual, as well as P0121, Throttle pedal position/sensor CKT Ring perform What now??


are you getting fuel now,have you checked fuel pressure?dtc just means it wasn't detected clear that code out,your tps you might need to check voltage,should be between .o5ohms.










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Sounds like a vacumn leak. Gasket under intake plenum may be leaking. Be sure the pcv valve has the o-ring around it in the correct place also as it will set a code.

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Engine runs well, but won't accellerate.


Replace the throttle positions sensor. it tells the computer how to mix the air fuel ratio. when this is not working the comupter dont know what to do to the enigne to give it power.

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