1999 Pontiac Bonneville stalls and dies

DANIELOROARK

MEMBER
1999 PONTIAC BONNEVILLE
6 CYL
FWD
140,000 MILES

I have 1999 Pontiac Bonneville while driving for about an hour of highway driving it will start to lose power and then will stale dan die. It will normaly take 10 mins to an 1 hour to restart. I have taken it to a pontiac dealership and first the said it was plug, wires, and oxygen sensor. They replaced them and sent me on my way. That didnt fix it. So brought it back and they said it is the crank sensor. So they placed and sent me on. Again didnt fix. Now they replaced the fuel pump and sent me on. And didnt fix it. What do tou think?

3 Replies

PROTECH1980

MEMBER
901 POSTS

Hard to say over the computer, Is the check engine light on/or do you know any codes stored? When the car is failing(not starting) we need to know what is missing, (spark, fuel, pulse) to properly diagnose the problem. Check this link to assist you: https://www.2carpros.com/articles/car-cranks-but-wont-start

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Monday, November 5th, 2018 AT 7:07 PM

DANIELOROARK

MEMBER
2 POSTS

The code that gets stored is multi cylinder missfire

Was this

answer

helpful?

Yes

No

Monday, November 5th, 2018 AT 7:07 PM

RASMATAZ

MECHANIC
75,992 POSTS

P0300 Random Misfires-is normally caused by vacuum leaks and contaminated fuel-

https://www.2carpros.com/articles/car-cranks-but-wont-start

Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

Was this

answer

helpful?

Yes

No

Monday, November 5th, 2018 AT 7:07 PM