1998 Pontiac Bonneville Logo
Posted on Feb 27, 2013
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Would the fuel vapor pressure sensor cause the car to not crank

The car will not crank and when it does every time you hit the gas pedal it acts like it wants to cut off

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Robert Totic

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  • Posted on Feb 27, 2013
Robert Totic
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Joined: Feb 26, 2013
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Disconnect the mass airflow sensor located between the air filter and the throttle body. if it runs better that way then the sensor has failed.if it runs worse that way, then check your fuel flow and pressure.I don't know which engine we're talking about, but if it doesn't have a MAF sensor then it has a MAP sensor which is hard to diagnose without a proper diagnostic computer, but you can see if the vacuum line going to it has fallen off or is cracked and leaking.Both sensors are quick reaction sensors and can be the cause of your symptoms.

5 Related Answers

Anonymous

  • 67 Answers
  • Posted on Apr 10, 2009

SOURCE: 1994 pontiac bonneville fires up but stalls imediatly

WOW a 94 with 46K on it thats rare. Your computer may be bad it sends the pulse to the injector.

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Anonymous

  • 11 Answers
  • Posted on Dec 09, 2008

SOURCE: 1992 Grand Prix LE

Did you check the fuel pressure at the fuel rail? with key in the on position to activate the pump? If you did and there was no pressure I would first check for the obvious, gas in the tank, leaking fuel from a line, check for flow before the fuel filter, located at the rear of the vehicle near the gas tank. take the fuel pressure line off put it in a catch can and have somebody turn the key to the on position to activate the pump, if it flows chances are the filter is plugged. Also pay attention to the sound of the pump if it is very loud there is a good chance the pump is failing and needs to be replaced. It could also explain why sometimes it dies. The pump is going out of range. Hope this helps

Anonymous

  • 1990 Answers
  • Posted on Jan 24, 2009

SOURCE: car want crank over

This is Caused by the Fuel Pump. If you remove the Fuel Pump relay and it will try to Crank, You have a Bad Fuel Pump. I do Believe that the Fuel Pump is located inside the Fuel Tank on the Sunfire. Not an easy Repair But, Necessary

66 chrgr

mike loshbough

  • 1011 Answers
  • Posted on Apr 23, 2009

SOURCE: UNKNOWN PROBLEM

have your ignition switch replaced this will fix the issue.very common!

Hector L. Morales

  • 649 Answers
  • Posted on Aug 02, 2009

SOURCE: 1990 Pontiac grand prix bogs down, and wants to

Have you checked the ignition module? More info such as eng size would be helpful to help you.

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Did it jump time. Have u checked fuel pressure with a gage, With a fuel pressure tester u can see if the pressure bleeds off right away. Should have fuel pressure around 45 to 50 psi. Also a bad fuel pressure regulator can cause that also, What about the mass air flow sensor.
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It cranks will not start

Hi there:
Two ways it could be a lack of fuel. Low fuel pressure or lack of injector pulse. Low fuel pressure is usually just a bad or weak fuel pump.. but you would want to check power to the pump when this happens before replacing it.

Injector pulse would be too low based on an input to the computer. These would include the coolant temp sensor, tps and mass air flow sensor.

Just a hit, sometimes the purge valve leaks fuel vapors into the intake and causes a hard start condition. However, this usually causes the engine to be flooded.. or have too much fuel or fuel vapors.

Other posibilitie could be the CKP (Crankshaft Position) sensor, but rare.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.
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The fuel pump relay will cause a stalling or no start condition. You are likely having mass airflow sensor, fuel pump, or fuel pressure regulator issues.

Bret
RepairPal.com
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