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Old 02-14-2008, 09:17 AM   #1
sirus
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I need advice on my car problem.

I have a 1992 Buick Century. i have started having problems recently trying to get on the interstate. Whenever i go onto the on ramp my car won't go above about 40 mph. It acts like it has no power. Sometimes it only takes a few seconds to kick up to speed. Other times it very slowly fights up to about 55 and then kicks back to normal. I took it to the shop and had it checked out. However, the mechanic didn't find anything and suggested a tune-up. Which it was time for anyway. It is still having that same problem. The car has 98,500 miles on it. I have no trouble around town or after i get it up past 55 or so on the interstate. Any ideas would be appreciated.
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Old 02-15-2008, 12:38 AM   #2
carls47807
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perhaps overdrive is going in too quickly? tap the brake (and I mean TAP) to see if it will downshift and get you more power.
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Old 02-15-2008, 09:23 AM   #3
sirus
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I don't think my car has overdrive. Anyway, I have popped it into 2nd and back into drive. It didn't help at all. It seems to vary with the temperature. I think i need to get my radiator flushed. That is what I am leaning towards.

Last edited by sirus : 02-15-2008 at 01:44 PM.
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Old 02-15-2008, 06:01 PM   #4
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you didn't say anything about it overheating.
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Old 02-15-2008, 09:39 PM   #5
sirus
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It's not overheating. It's just a guess. I checked to see if it needed any coolant yesterday. I haven't checked in awhile. There is some build up. Anyway, I am going off of that, and the fact that the problem is always worse when it is colder.
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Old 02-16-2008, 12:33 AM   #6
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correct me if i'm wrong, but that doesn't make any sense.
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Old 02-16-2008, 02:11 AM   #7
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trouble codes?
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Old 02-16-2008, 08:57 AM   #8
sirus
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Quote:
Originally Posted by carls47807
correct me if i'm wrong, but that doesn't make any sense.
I forgot to add that the reservoir is just as full as it was 6 months ago and the coolant is very dark green instead of very light green.

Quote:
Originally Posted by tbaxleyjr
trouble codes?
I don't have the tool to read the codes.
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Old 02-16-2008, 02:40 PM   #9
tbaxleyjr
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the only tool you need to read trouble codes on a 1992 Buick is a bent paper clip, a Haynes manual (to make sure you jumper b terminal and ground on the ALDL connector and provide instructions for counting the number of flashes of the check engine light) and a good set of eyes to count the flashes

does your Buick have the 3.3L or 2.5L? When you come back with the trouble codes, knowing which engine and transmission (3 spd or 4 spd overdrive) you have in this Buick will help me or someone else around here use find the right diagnostic chart to help with your issue.

http://www.autozone.com/az/cds/en_us...es.htm#hd1-1-8 is a good starting point.
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Old 02-18-2008, 04:17 AM   #10
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Your radiator isn't going to make your car have accelerating problems.
.
.
.
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Old 02-21-2008, 11:53 PM   #11
sirus
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Quote:
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Your radiator isn't going to make your car have accelerating problems.
.
.
.
I realize that now. I talked to a friend that is very good with cars. He thinks it is a problem with the transmission. I am going to try getting that flushed and have them check the codes at the same time.
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Old 02-22-2008, 05:07 AM   #12
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now why didn't I think of that.
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Old 02-22-2008, 06:39 AM   #13
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Does the engine sound like it's in really high RPMS when it won't go over 40? (early 90's Buick Centuries don't have tachs IIRC) This would mean that it is your tranny not shifting.

Also, If you don't want to ghetto-rig your car to find the trouble codes (nothing wrong with that, but some wouldn't do it) I think some car parts places can scan your car for free. If you do this please don't go during busy hours with no intention of buying parts from them. When business is slow I doubt they'd mind too much (they're usually car guys).
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Old 02-22-2008, 09:51 PM   #14
sirus
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Quote:
Originally Posted by carls47807
now why didn't I think of that.
Honestly, I don't know why I didn't think of it to begin with myself. It fixed my problem too.
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Old 02-23-2008, 05:34 AM   #15
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what did u find out to be the problem?
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