1989 Buick riviera 3800... power loss

8,545

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

8,545

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

3 people found this 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!

8,545

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

Your Answer:

Riviera

Looking for a Used Riviera in your area?

CarGurus has 87 nationwide Riviera listings and the tools to find you a great deal.

ZIP:

Buick Riviera Experts

  • #1
    Alvin1966
    Reputation
    1,140
  • #2
    Chris Kelley
    Reputation
    570
  • #3
    Jason Zane
    Reputation
    410
View All

Related Models For Sale

Used Cadillac Eldorado
286 listings starting at $2,995
Used Buick Regal
86 Great Deals out of 3,945 listings starting at $4,999
Used Chevrolet Camaro
238 Great Deals out of 27,434 listings starting at $2,077
Used Ford Mustang
268 Great Deals out of 38,445 listings starting at $1,350
Used Chevrolet Corvette
88 Great Deals out of 15,086 listings starting at $3,620
Used Chevrolet Monte Carlo
4 Great Deals out of 952 listings starting at $2,950
Used Buick LeSabre
1,277 listings starting at $1,750
Used Cadillac DeVille
1,280 listings starting at $1,150
Used Buick Skylark
59 listings
Used Lincoln Continental
31 Great Deals out of 3,188 listings starting at $23,995
Used Buick Electra
14 listings
Used Pontiac Grand Prix
11 Great Deals out of 1,761 listings starting at $800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.