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1998 Pontiac Bonneville Repair Question


Topics covered: Sensor, Coolant, Fuel pressure.
Mileage: 242,752 miles.

Asked on August 8, 2012

Car want stay running

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

Answer

Replied on August 8, 2012

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

Tiny Answered by saturntech9 (expert)
23,190 answers provided
Replied on August 8, 2012

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

Tiny Response from lesterthebossoneal
1 question asked
Replied on August 8, 2012

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 Answered by saturntech9 (expert)
23,190 answers provided

Replied on August 8, 2012

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 Response from lesterthebossoneal
1 question asked
Replied on August 8, 2012

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

Tiny Answered by saturntech9 (expert)
23,190 answers provided
Replied on August 8, 2012

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

Tiny Response from lesterthebossoneal
1 question asked

Replied on August 8, 2012

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 Answered by saturntech9 (expert)
23,190 answers provided
Replied on August 8, 2012

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

Tiny Response from lesterthebossoneal
1 question asked
Replied on August 8, 2012

Have you checked cam timing?

Tiny Answered by saturntech9 (expert)
23,190 answers provided