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1994 Buick Park Avenue Question: Engine is still bogging when hitting 40 to 50 miles on gradual up hill driving.

 

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[deleted], 3.8L V6 Supercharged, Honolulu, HI, February 15, 2012, 18:13
 Rookie

Wasn't doing this before I did tune up, added new fuel pump, adv valve was changed, exhaust hole patched, supercharger oil drained 2x, new battery, changed starter, serpentine belts and so on. Car used to go hill and pick up speed easily, now it's bogging on just a slight inclination when speed is accelerated between 40 & 50 mph.

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    patrick mannion from Greg Solow's Engine Room, February 15, 2012, 22:54
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     Master

    Have you changed the fuel filter, then I would check fuel pressure and volume of delivery, then check un-regulated pressure. May have restricted exhaust/catalytic converter. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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    [deleted], February 16, 2012, 19:00
     Rookie

    Fuel filter was changed, fuel pressure & volume of delivery is fine along with un-regulated pressure which was checked under diagnostic testing. Exhaust is ok, but will be checking on the catalytic converter tomorrow. Question: Is it ok to run car without catalytic converter during a test run? Also, today while on test drive up slight inclination, I didn't even hit 40 mph, hesitation was starting at only 30 mph.
    Question: Can this car run without a supercharger, and what would it be less inexpensive to take it back to a base model or do you think I should invest in a supercharger. Question: Could their also be a problem with sticky valves? Thank you so much for taking the time on answering my first question. Aloha!

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