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Rythmic surging then dies

Tiny
WODEN
  • MEMBER
  • PONTIAC SUNFIRE
97 Pontiac Sunfire 2.4 w/ ~150,000km
Day before noticed idle slightly rising then droping while at a stop. Next day ran fine, then suddenly lost all power and died while on highway. Towed car home, after sitting for 8hrs car started right up but surges excessively when in park, in drive car lunges rythmatically and after minutes it stalls and becomes difficult to start. Temperature last couple of days dropped to -14 deg C, no Codes, any idea?
Thanks
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Monday, February 5th, 2007 AT 10:26 PM

3 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
The smaller GM cars around those years had some issues with the catyletic converters plugging. Loosen the exhaust pipe at the manifold and start the car. It will be loud but that lets the exhaust out without going through the converter. Drive it a little and see if it has normal power. Let me know how it goes
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Wednesday, February 7th, 2007 AT 7:42 AM
Tiny
WODEN
  • MEMBER
  • 2 POSTS
I completely disconnected the exhaust pipe going to the manifold and this did not change the condition.
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Thursday, February 8th, 2007 AT 10:28 AM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Check the fuel pressure. Has the car been tuned up? The coil housing on that engine should be replaced during a major tune. Also check for vacuum leaks
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Friday, February 9th, 2007 AT 9:31 AM

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