my 1988 sse seems like its running weak.please help - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-29-2007, 11:50 AM   #1
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Default my 1988 sse seems like its running weak.please help

o.k here is the deal my 88 sse now has 76,875 original miles and ran great for the last 2 years i had her. but for the last month or so i've noticed a change in her power getting worse day by day. but i just had a baby boy who is now 3 mnts old so i had no time till now. when im at a red light and it turns green i can put my gas pedal to the floor and she will take off quick but feels like a 4 cylinder. it then takes about a min to get up to 50 60 mph., i was even passed by a hot girl in jetta on the high way who waved
(i think bye) to me. so now im here asking for help from you guys.

here is some things i did to bonnie in the last 8 months..

new spark plugs and wires, new filters all over entire car, new m.a.f.*, new radiator, new transmission fluid lines and brake fluid lines on entire car, a full 6 point tune up, oil change, i had my exaust fixed as i bottomed out and the pipe slit into 2 so i had it overlapped with a sleeve and clamped twice on both sides of sleeve but it still sounds a lil loud like a honda civic hatchback.

and when i hook up my digital code scanner it reads everything is fine.?
could it be a bad 02 senser?
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Old 03-29-2007, 12:00 PM   #2
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exhaust fixed meaning you replaced your cat? are you getting any intermittent codes from this?
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Old 03-29-2007, 12:06 PM   #3
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Default yes

i did replace the cat and the header pipe at the same time, and no im not getting any intermit codes, i even unplugged the battery and computer and then plugged it back in and tried again but no codes, im dumb founded by this one. i even have the original gm shop service manual from 1989 for my 1988 sse... its bigger then a phone book but dont help with this problem
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Old 03-29-2007, 02:12 PM   #4
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id say to check the fuel pressure, and maybe try running fuel injector cleaner threw it to see if that helps at all

as far as i know, the o2 sensor wont really cause for there to be a very large loss of power..what kind of gas mileage are you getting?
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Old 03-29-2007, 03:16 PM   #5
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Default yes i tried fuel injector cleaner

and my gas millage seems good i guess. i put $20 a week to 8 miles a day at $2.69 a gallon. i i always use fuel injector cleaner atleast every 2 weeks... how do i test the fuel pressure?
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Old 03-29-2007, 04:08 PM   #6
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Default Re: yes i tried fuel injector cleaner

Quote:
Originally Posted by 88bonnsse
. i put $20 a week to 8 miles a day at $2.69 a gallon.
if those numbers are right, that would mean youre getting 8 mpg this is with filling up each time right? not just throwing $20 worth of gas in?

Quote:
Originally Posted by 88bonnsse
how do i test the fuel pressure?
you need to get a fuel pressure tester, which i believe are for sale at most auto parts stores. heres an example of one http://www.actron.com/product_detail.php?pid=16174



when was the last time that the fuel filter was replaced?
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Old 03-29-2007, 06:32 PM   #7
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Default no

no i dont fill it up i wait for the tanbk to hit a quarter mark and then i throw $20 every week.
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Old 03-30-2007, 12:36 AM   #8
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oh, well then my calculations are off. i suggest just filling it up each time gas goes down
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