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

20,215

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

1 out of 1 people think this is helpful.
92,525

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

33,615

Where did you get the gasoline?

65,845

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

3 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 1995 Roadmaster with idle issues and throttle issues 5 answers

    On Dec. 1st, 2011 my Buick quit running on me. Assuming I may have ran it out of gas I put fuel in it. Didn't work. Replaced the strainer and filter. Nothing. Decided to replace the pump, will f...

    1995 Buick Roadmaster 4 Dr STD Sedan

    -

    Maintenance & Repair

  • Sputtering Engine 1 answer

    I have a 1996 Buick Roadmaster with a 5.7 LT1 that sputters while driving on the interstate when accelerating and cruising. Have heard of coil pack replacement and EVAP problem. Thank you.

    1996 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

  • service engine light 3 answers

    I have a 95 buick roamaster and the service engine light comes on and off and when that happens the fans come on and when I accelerate the car acts like it wants to cut off and rattles.So I ease up on...

    1995 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

  • 92 buick roadmaster 1 answer

    runs great when cold no miss after about 10 min starts to miss when accelerated has been doing the same thing for about 3 weeks driven daily 60 miles have changed fuel filter air filter checked for ...

    1992 Buick Roadmaster 4 Dr STD Sedan

    -

    Maintenance & Repair

  • 92 buick roadmaster 90.000 miles runs great then started missing when accelerated not a bad miss just a sputtering changed the fuel filter no help gas cap builds up preasure but ran with no gas cap no 4 answers

    changed the fuel filter no help gas cap builds up preasure when run for a few miles ran with no cap no help checked wires at night no arking i could see plugs and wire and dist cap all about 20000 mil...

    1992 Buick Roadmaster 4 Dr STD Sedan

    -

    General

Roadmaster

Looking for a Used Roadmaster in your area?

CarGurus has 72 nationwide Roadmaster listings and the tools to find you a great deal.

ZIP:

Search Buick Roadmaster Questions

Buick Roadmaster Experts

#1 DanR63
DanR63
Reputation 430
#2 Rowefast
Rowefast
Reputation 270
#3 Tom Demyan
Tom Demyan
Reputation 220
View All

Related Models For Sale

Used Chevrolet Caprice
157 listings starting at $7,995
Used Cadillac DeVille
6 Great Deals out of 1,645 listings starting at $1,999
Used Mercury Grand Marquis
30 Great Deals out of 1,827 listings starting at $2,250
Used Lincoln Town Car
30 Great Deals out of 1,823 listings starting at $1,750
Used Buick LeSabre
15 Great Deals out of 1,930 listings starting at $995
Used Buick Park Avenue
445 listings starting at $4,991
Used Buick Regal
108 Great Deals out of 10,814 listings starting at $3,995
Used Buick Century
840 listings starting at $3,140
Used Cadillac Eldorado
332 listings starting at $2,900
Used Chevrolet Camaro
205 Great Deals out of 30,800 listings starting at $1,217

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.