2CarPros - Car Questions & Answers

1999 Pontiac Bonneville Repair Question


Topics covered: Sensor, Fuel pressure, Fuel pump.
Mileage: 13,200 miles.

Asked on December 1, 2011

Car will stay running for about 10 minutes and then die.

Car will stay running for about 10 minutes then die,we have replaced the fuel sock,fuel pump,fuel filter,fuel pressure regulator,fuel pump relay,idle air value,crank shaft sensor,egr value,throttle positioning sensor,and map air flow sensor. Car was running fine until this happen. Check engine light is not on. Only code that comes up is random miss fire.Vehicle is a late 1999 model. Sometimes will come up as a 2000. Any help or suggestions would be wonderful.
Avatar Asked by Richard Neumann

Answer

Replied on December 1, 2011

Does it start back up without a problem or is it refusing at times-

Tiny Answered by rasmataz
68 questions asked
Replied on December 1, 2011

It starts right back up without a problem.

Tiny Response from Richard Neumann
1 question asked
Replied on December 1, 2011

Check the fuel pressure fuel pump could be failing when it heats up it breaks-then it repeats when cool for a bit-

Tiny Answered by rasmataz
68 questions asked

Replied on December 1, 2011

will try will let you know if it works thanks

Tiny Response from Richard Neumann
1 question asked
Replied on December 5, 2011

Any word on this yet Richard? If not, try checking fuel pressure and spark when the problem occurs.

Tiny Answered by rivermikerat (expert)
5,494 answers provided
Replied on December 5, 2011

With fuel pressure gauge tester,pressure was about 42,but when I tap on mass air flow sensor car died right away. Think car has about two problems. Maybe fuel injectors?

Tiny Response from Richard Neumann
1 question asked

Replied on December 5, 2011

It sounds like either the mass airflow sensor is either faulty or improperly plugged in(loose wires or connectors).

42 PSI sounds like it's in the ballpark.

Check the wiring from the coil(s) to the ECU and grounds.

Tiny Answered by rivermikerat (expert)
5,494 answers provided