1989 Buick riviera 3800... power loss

6,725

Asked by Sep 17, 2011 at 03:34 AM about the 1989 Buick Riviera

Question type: Maintenance & Repair

my rebuilt engine has 70k miles on it.. my stock parts have been transferred to the rebuilt engine too. when i take it for a drive, it
seems to be missing; engine will idle but run rough. feels like it chuggles along in drive; misses. transmission shifts welll, it goes
into all gears fine. i replaced MAF. i inspected all spark plugs, #2 has oil in the cylinder; rings getting shot in that one. NO
TROUBLE codes in the diagnostic mode. all cylinders seem to fire fine; all spark plugs fire. i have some gas smell on cold start ups.
22 year old ignition coil; never been changed same with catalytic converter. exhaust seems to flow freely. this started after
fueling up and going onto the highway.   we are the first and only owners of the car and have full service history. rest of car has
189k miles. i'm getting stumped.. should i go drop the fuel pump next??  fuel pressure regulator?

3 Answers

6,725

it actually was the Ignition module under the ignition coil pack. car still runs like a dream.

3 out of 3 people think this is helpful.

Hi Jason. I've also got an '89 Riviera. I got the MAF replaced about 6 months ago after some off and on again rough driving and stalling. Recently its been driving rough again but it hasn't come close to a stall. I'm fairly certain all spark plugs are fine. I got the cat replaced and the person who installed it said the car was running rich, the cat was black and was fairly certain its the coil pack or module. So today I took off the coil pack just to understand how i would replace it. After lifting it up and screwing it back on the car ran fine, but after lifting it again and placing it back on the car is back to itself. I'm considering the problem exists in the wires between the module and coil pack because just lifting it off and moving them around seemed to make the difference, and that would be an easy fix, but I was wondering how you found out it was the module and not the coil pack. Any advice is appreciated. Thanks!

6,725

replaced the coil pack and no change.. that was the next step.

Your Answer

Add photo

Related Questions

  • power loss.. 3800 v-6 1989 Riviera 2 answers

    my rebuilt engine has 70k miles on it.. my stock parts have been transferred to the rebuilt engine too. when i take it for a drive, it seems to be missing; engine will idle but run rough. feels like ...

    1989 Buick Riviera

    -

    Maintenance & Repair

  • 1985 Buick Riviera keeps stalling out! 8 answers

    ok, this is a bit long winded but i want all the information there as to get a proper assessment. i bought my buick about 10 days ago and have been having nothing but problems with it. the first time ...

    1985 Buick Riviera STD Coupe

    -

    Maintenance & Repair

  • driving on the highway all of a sudden started missing loss of power 1 answer

    1996 Buick Riviera Supercharged Coupe

    -

    Maintenance & Repair

  • 1995 Riviera 3.8 sc engine noise 6 answers

    I have a 95 riviera 3.8 sc with 67,000 miles, recently I was driving and heard what I thought was a rattle or noise. You hear it when it starts, shuts off, idling when in gear, but stops or is very ...

    1995 Buick Riviera Supercharged Coupe

    -

    Maintenance & Repair

  • Where can I find the computer on a 1989 Buick LeSabre? 47 answers

    I have a 1989 Buick LeSabre that stalls out while in motion. Seems to happen when a part gets too hot. After sitting for awhile, I can drive for awhile again. Assume it is the Computer or the Catalyt...

    1989 Buick LeSabre

    -

    Maintenance & Repair

Riviera

Looking for a Used Riviera in your area?

CarGurus has 137 nationwide Riviera listings starting at $2,495.

ZIP:

Search Buick Riviera Questions

Buick Riviera Experts

#1 Alvin1966
Alvin1966
Reputation 1,040
#2 Chris Kelley
Chris Kelley
Reputation 540
#3 Jason Zane
Jason Zane
Reputation 380
View All

Related Models For Sale

Used Buick Regal
123 Great Deals out of 10,939 listings starting at $1,850
Used Cadillac Eldorado
423 listings starting at $2,250
Used Chevrolet Corvette
180 Great Deals out of 20,801 listings starting at $3,995
Used Cadillac DeVille
6 Great Deals out of 1,955 listings starting at $1,750
Used Ford Mustang
363 Great Deals out of 44,352 listings starting at $1,000
Used Chevrolet Monte Carlo
15 Great Deals out of 1,658 listings starting at $2,000
Used Chevrolet Camaro
283 Great Deals out of 38,314 listings starting at $1,250
Used Buick LeSabre
11 Great Deals out of 2,343 listings starting at $1,795
Used Lincoln Continental
3,715 listings starting at $42,294
Used Ford Thunderbird
13 Great Deals out of 1,112 listings starting at $6,900

Used Cars For Sale

1995 Buick Riviera For Sale
16 listings starting at $2,495