1989 Buick riviera 3800... power loss

7,725

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

7,725

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

3 of 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!

7,725

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 133 nationwide Riviera listings and the tools to find you a great deal.

ZIP:

Buick Riviera Experts

  • #1
    Alvin1966
    Reputation
    1,110
  • #2
    Chris Kelley
    Reputation
    550
  • #3
    Jason Zane
    Reputation
    410
View All

Related Models For Sale

Used Buick Regal
180 Great Deals out of 9,120 listings starting at $2,500
Used Ford Mustang
696 Great Deals out of 37,635 listings starting at $895
Used Chevrolet Camaro
420 Great Deals out of 30,657 listings starting at $3,550
Used Chevrolet Monte Carlo
13 Great Deals out of 1,301 listings starting at $2,500
Used Chevrolet Corvette
283 Great Deals out of 20,585 listings starting at $2,990
Used Buick LeSabre
23 Great Deals out of 1,835 listings starting at $999
Used Chevrolet Caprice
188 listings starting at $9,995
Used Pontiac Grand Prix
30 Great Deals out of 2,706 listings starting at $1,491
Used Ford Thunderbird
17 Great Deals out of 1,065 listings starting at $6,950

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.