Question about 2003 Saturn VUE

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Engine idles great won't run under loadd

Engine idles fine then bogs down when accelerator is depressed. This condition took about a week to digress from running fine to completely un- drivable. I have changed out the fuel and air filters as a first response to this condition, and am now open to suggestions.

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  • jerriepugh Feb 26, 2009

    1999 suburban 5.7 liter .runs good cold . after 15 min it bogs when you gas it , it is hard to get rpms over 1500 when its hot . codes read lean condition on both banks . replaced fuel filter . tested fuel pressure 58 psi cycled .50 psi running , no leak down after . replaced ground to frame.symptoms have got worse over time . i tried removing pre cat sensors and running - no improvement .

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Sounds like the cat. converter may be plugged up ,you can do the quick waywith the car in park and E brake on, and that is have a buddy snap the throttle untill you find the no power spot and with a good pair of gloves, just put your hand over the tail pipe and you should feel it wanting to push your hand off if its weak then its propably bad.or just run it by any decent muffler shop and they will check it usually free have a good day DB

Posted on Feb 03, 2009

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