CAR WANT STAY RUNNING

1998 Pontiac Bonneville

Tiny

lesterthebossoneal

August, 8, 2012 AT 3:08 AM

My car want run with out holding pedal down. Its a 98 bonneville with no super charger. Ive changed fuel pump. Fuel pressure regulator. Computer, coils, plugs wires, control module, mass airflow, idle air control valve. Checked for vacuum leaks an there arent any, also changed pcv valve and egr an catalytic converter and o2 sensors im stuck

FOUND 1152 RELATED QUESTIONS

9 Answers

Tiny

saturntech9

August, 8, 2012 AT 3:19 AM

Any codes?Also have you checked the coolant temp sensor?

Tiny

lesterthebossoneal

August, 8, 2012 AT 12:35 PM

No there are no codes an coolant temp sensor has been replaced already

Tiny

saturntech9

August, 8, 2012 AT 3:25 PM

Have you used a fuel pressure gauge to see if your fuel pressure is leaking down to see if maybe the fuel is some how leaking into the engine causing it to flood?

Tiny

lesterthebossoneal

August, 8, 2012 AT 3:58 PM

Yea it had good pressure no leaks. Computer ecm. Coils. Plugs. Wires. Iac valve. Mass airflow.O2 sensors. Catalytic converter. Intake plenum. Vacuum lines. Cleaned the throttle. Pcv am housing. Tested the injectors. Crank sensor. Control module an harness. Fuel pump an regulator

Tiny

saturntech9

August, 8, 2012 AT 4:11 PM

Do you have a scan tool that reads live engine data?

Tiny

lesterthebossoneal

August, 8, 2012 AT 5:02 PM

Yes didn't pull any codes or anything of concern just normal reading s

Tiny

saturntech9

August, 8, 2012 AT 5:17 PM

I know you replaced the coolant temp sensor but have you actaually compared the what the computer says for coolant temp with the actual coolant?To make sure its within 10 degrees all the way up till the radiator fan comes on?

Tiny

lesterthebossoneal

August, 8, 2012 AT 5:30 PM

Yes thermostat opens at right temp antifreeze is full and cmptr shows sensor properly reads

Tiny

saturntech9

August, 8, 2012 AT 9:12 PM

Have you checked cam timing?

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