Question about 2009 Chevrolet Traverse LT2

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2010 malibu p0172 error code

Runs ok when warm,starts ok when warm,acts like its flooded and hard to start when cold

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Pyrhyc
  • 2028 Answers

SOURCE: 1997 Malibu 3L V6 Suddenly hard to start Suddenly hard to start

Could you give more detail as to what it's doing exactly? Is it having a hard time cranking the engine or does the engine crank but not want to get started?

Posted on Aug 01, 2008

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SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

3mac
  • 61 Answers

SOURCE: 1996 Chevy Express 1500 w/5.0 bogging only when warm.

The cylinder 7 misfire is likely a symptom of the problem, not the problem itself.

Typically, the catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream 02 sensor reading should be fairly steady. Typically the P0420 code triggers the check engine light if the readings of the two sensors are similar. This is indicative of (among other things - such as faulty sensors in the "emissions loop") a converter that is not working as efficiently as it should be.

I do not believe that it is a problem with a valve/head gasket or cam.

Posted on Jan 13, 2009

  • 74 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Posted on Feb 17, 2009

  • 1 Answer

SOURCE: 1998 Chevy Silverado 3500 7.4 starts hard when warm

Just did mine and it was the fuel pressure regulator, same exact symptoms you had.

Posted on Sep 20, 2009

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1 Answer

2002 Ford Mustang GT, CAR STARTS UP FINE WHEN COLD. Hard to start when warm No Check Engine lights come on.


Think about how the vehicle is acting. Starts fine when cold, hard to start when warm. In these computer operated systems, the computer runs everything. Starts fine when cold: the computer has the engine in cold start mode putting more fuel in till it warms up. Temperature sending unit in the manifold sends a message to the computer telling it to stop the cold start mode and it stops dumping excess fuel into the cylinders and it runs fine. IF, mind you, IF the temperature sending unit is faulty, it's not telling the computer to stop the cold start mode and is flooding the engine with fuel cause it's sill in cold start mode. This is my take away on your situation and the temp sending unit is something to check to be sure it's functional. Check it out. I hope this WAS the answer to your problem my friend. It's typical. Luck to'ya Bro.

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After starting cold does it continue to run properly as long as you want? Is fuel mileage normal? If not, could be bad coolant temp sensor failing to tell ECU engine is warm, such that it is flooding when trying to start hot.

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Hello I have a 97 Cadillac Seville that I am


Being that there are misfire codes, (300 series P codes), and it's flooding I would put a fuel pressure gauge on it and try to check the injectors and the fuel pressure regulator for leakage. If the vehicle has sat for a while, 1 or more of the injectors may have stuck open. If the fuel pressure is way to high it can cause the pressure regulator to leak. See if that helps.

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Have a test done on the glo-plug system as it appears that they have burnt out and are not pre-heating the cylinders or providing a source of ignition for the atomised fuel from the injectors

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Is the check engine light on while you're cranking the engine?

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how long has it been since a tuneup was done to the car.this maybe all that is needed.check the tps as these have a problem with hard start when cold at times.it pobably wouldn`t hurt to have the fuel pressure tested when cold.the map sensor can cause problems as well it this situation

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454 ci gm turns over hard backfires timing ok acts flooded


Check fuel pressure, and regulator. A leaking regulator gives a warm engine more fuel [ it does not like it] a cold motor does. same as a flooded motor. Good luck

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3 Answers

1998 Chevy tahoe Hard to start when cold


replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 | 1999 Chevrolet C/K 2500

1 Answer

1998 Chevy tahoe Hard to start when cold


Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Jan 03, 2009 | 1998 Chevrolet Tahoe

1 Answer

1999 Dodge Ram 1500 runs ok til warm, then..


Have your battery tested. When the battery has a problem the dodges will act this way.

Dec 04, 2008 | 1998 Dodge Ram 1500 4WD

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