Question about 1985 Buick Century

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!985 Buick Century >

I recently bought a 1985 Buick century 3.3 liter >i have changed every thing except the fuel pump >its on the road certified >the problem i am having >it doesnt idle properly >idling fine when in the drive way But at times it hesitates>when i put it in gear and when its idling did a compression test every thing was good i changed all the plugs ect and pcv valve wires ect >the engine light was on when i bought it so i changed the ox sensor >i disconnected the battery and the light went out >after i put the battery cables back on the battery .I put some complete fuel cleaner and changed the fuel filter >it still runs like its missing >so i am thinking it might be the fuel pump >i also was wondering if i could get a diagram of the vacum lines >because some of them were off >and i put them back on where i thought they should be >it seems like since i changed the ox sensor it has been running poorly >but it may also be because i washed the engine with engine shampoo>the motor has 163 kms on it >i also disconnected the torque converter to see if it made a difference but no success and re hocked it back up and i havent put it on a computer scanner yet >please help i would appreciate it .i restored the vehicle completely >its a two door and was bought off an old couple who had it since it was new and now so is the rest of the car except for my problem >Thanks .Bye for now Joseph

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  • Joe  Maher
    Joe Maher Jan 03, 2010

    Well i fixed it myself ....the new wires ...two of them were sparking out ...which was causing the motor to run erratic....took new wires back ...bought life time ones ...solved the problem ....returned other ones ...
    It's not some thing that happens too often ...just because it's new ...doesn't mean it will always be made properly ....

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Check timing

Posted on Jul 07, 2008

Testimonial: "Fixed the problem myself ...it turned out to be .At night i sprayed the plug wires with water and noticed a electrical jump ...changed the new wires again ...fixed the problem ...i returned all the new wires i previously installed ...and company gave me new ones too install .Runs like a dream come true ."

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Do a balance test on the injectors. Remove one injector plug one at a time. Each time you remove one you should have a miss. All 6 should have the same miss. You could have an injector going bad.

Posted on Jun 30, 2008

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