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6th Gen ('00-'05): Starts....Stalls....Starts and runs.

Old 11-30-2017, 12:02 PM
Thread Starter
Join Date: Nov 2017
Posts: 1
Default Starts....Stalls....Starts and runs.

Hello all,

I have an '05 Monte with the 3.8 L V6. It will fire and then immediately die. I replaced the air cleaner and that helped, but still some issues. It coded with "Bank 1 too rich". I replaced the MAF about a year ago. I am assuming injector issues, maybe fuel pump? It has 130K miles.

Any ideas would help.

Thank you

Last edited by [email protected]; 11-30-2017 at 12:06 PM.
Old 11-30-2017, 01:56 PM
Join Date: Apr 2016
Location: georgia
Posts: 205

sounds like maybe the fuel presuure regulator

What causes the P0172 code?
  • A dirty mass air flow sensor overstating the amount of air entering the engine which may cause excessive fuel delivery
  • A bad oxygen sensor
  • A leaking fuel injector allowing too much fuel to enter the combustion chamber
  • A faulty fuel regulator, which may not be regulating the pressure of the going to the engine as it should
  • A vacuum leak
  • A possible fault in the coolant system such as a stuck thermostat or bad coolant temperature sensor
  • Worn spark plugs
Old 11-30-2017, 03:54 PM
ChibiBlackSheep's Avatar

Monte Of The Month -- August 2014
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I was also thinking fuel pressure regulator. Can you keep it alive if you give it a little gas?
Old 11-30-2017, 04:13 PM
Join Date: Dec 2016
Location: SC
Posts: 149

You can also ohm the injectors to see if one is way off.

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