engine chugs and stumbles upon acceleration.

Asked by Mar 22, 2013 at 04:55 PM about the 1992 Buick Roadmaster 4 Dr STD Sedan

Question type: Maintenance & Repair

I have replaced egr valve, air filter and sprayed throttle body cleaner into running engine.  all these measures seemed to solve the problem for awhile.  Symptoms reappeared immediately after putting in6 gallons of fuel yesterday.  I'm replacing fuel filter in a few minutes.  I'm wondering if there might be a more likely cause for this frustrating problem in an otherwise good running 5.7L motor.  Any suggestions would be appreciated.

4 Answers

20,565

a fresh coil pack would be nice,even if its not the problem

1 of 1 people found this helpful.
94,965

When was the last tune up? You might try a good injector cleaner in the fuel, this stuff they call fuel anymore is terrible.

33,965

Where did you get the gasoline?

67,325

Could be a problem with the EVAP system. The EVAP system routes gasoline fumes back to the engine to be burned instead of being released into the air. If your purge valve is stuck open raw gas or excessive fumes may be getting forced into the engine when you get gas. This will cause an overly rich air/fuel mixture which will make your engine run poorly. Especially right after you buy gasoline. Since your Buick is a 1992 model it is OBD I & will not set a trouble code for this. It MAY set a trouble code for a rich oxygen sensor. Is your "service engine soon" light on? HTH. -Jim

4 of 4 people found this helpful.

Your Answer

Add photo

Related Questions

Roadmaster

Looking for a Used Roadmaster in your area?

CarGurus has 71 nationwide Roadmaster listings and the tools to find you a great deal.

ZIP:

Search Buick Roadmaster Questions

Buick Roadmaster Experts

#1 DanR63
DanR63
Reputation 440
#2 Rowefast
Rowefast
Reputation 270
#3 Tom Demyan
Tom Demyan
Reputation 230
View All

Related Models For Sale

Used Chevrolet Caprice
151 listings starting at $10,900
Used Cadillac DeVille
4 Great Deals out of 1,626 listings starting at $1,988
Used Lincoln Town Car
34 Great Deals out of 1,791 listings starting at $1,500
Used Chevrolet Camaro
244 Great Deals out of 31,183 listings starting at $369
Used Mercury Grand Marquis
30 Great Deals out of 1,835 listings starting at $2,000
Used Ford Taurus
270 Great Deals out of 20,569 listings starting at $1,995
Used Buick Park Avenue
455 listings starting at $4,991
Used BMW 7 Series
165 Great Deals out of 5,956 listings starting at $2,999
Used Chevrolet Corvette
149 Great Deals out of 20,682 listings starting at $3,995
Used Ford Mustang
543 Great Deals out of 45,840 listings starting at $1,999
Used Buick LeSabre
20 Great Deals out of 1,919 listings starting at $1,000

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.