1995 Roadmaster with idle issues and throttle issues

Asked by Mar 01, 2012 at 06:57 PM about the 1995 Buick Roadmaster 4 Dr STD Sedan

Question type: Maintenance & Repair

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 fire and run
now.  WONT IDLE FOR CRAP!  It idles rough and upon pressing the accelerator it attempts to die then
comes back to life after a few seconds.  Shooting water out of the tail pipe (I am pretty sure it's water
at least).  Ran some heat and fuel stabilizer through the system and no luck.  Didn't fix the issue.  What
is left?  I am tossing around the idea of maybe fouled out plugs, dirty MAF sensor, bad IAC, or the tps
might be bad.  Any ideas? Anyone go through something like this with their Buick before?

5 Answers

505

First thing I would do is get it over to a place where you can check for engine codes. Even if the check engine light is not on you might have some. How many miles on your roadmaster? Does yours have the LT1 5.7? Check the wires to see if they are not arcing (breaking down). You might be ready for a cap and rotor and if you do have the LT1 just buy a complete new distributer assembly. because you will have to remove the water pump to get at it. After all that work it just makes sense to replace all of it. (been there twice with both of my 96 wagons) as for the water out of the tail pipe don't sweat it. It is a normal for an engine to have water coming out of the tailpipe.

2 of 2 people found this helpful.

I'm not worried about the water. It's just the idling. Im leaning towards the ignition, thinking the plugs are fouled. it is the "lt1" motor. been working on gms for about fifteen years and am stumped on this one.

It's got about 175k on it

505

The opti spark distributers are really known for great relibility BUT when they crap out the car does all kinds of things. My first 96 roadmaster wagon (250K) one of the rotor hold down scews came out. The car acually ran fine but the car would backfire at start up and break starters. The sceond roadmaster wagon (187K) would start up fine but like your car would idle rough and at high speeds had a bad missfire. that one too was the rotor was loose and the cap was arcing out interally. The check engine lights never came on in either case with both cars but when I checked them with my scan tool I hada code (mulitple spark missfire). The plugs i checked on both cars and they looked great even with the high milage. I am not saying you should not check them but I am guessing and from experince with both cars that with the mileage you have on yours (assumming you have never touched the distributer) that the distributer should be at least looked at as a strong possiblity of your problems. I would still look at the wire too since they are probably just as old. I have been working on cars for over 30 years and have done mulitple frame off restos and engine rebuilds. I hope my advise is helping you. Take care Dan

4 of 4 people found this helpful.
25

My 92 was dying after startup, had to increase rpm in order to keep motor running. Sprayed berrymans intake cleaner into hose I disconnected from the brake master cylinder. While parked you have someone accelerate the rpm to 1500 as you spray.(on/off the spray to keep engine from dying). REMEMBER hook master cyl. hose back up. Do 2 times in month.

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

  • 1996 Buick Roadmaster idling and skipping issues.Video posted 6 answers

    I have a 1996 Buick Roadmaster 350 LT1 5.7, I am having some issues with the vehicle idling rough and seems to be missing. When I turn on the AC the car runs a little better and sometimes after shutti...

    1996 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

  • 1995 Buick Roadmester doesn't start, changed battery and starter and still won't start. Dash lights come on but nothing else happens. 3 answers

    My 1995 Buick Roadmaster had an intermittent starting problem. When it didn't start the dash lights would illuminate but the starter would not turn over. Other times it would start with no problem. ...

    1995 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

  • 1992 Buick Roadmaster with the 5.7L V8 engine 3 answers

    I have a 1992 Buick Roadmaster with the 5.7L V8 engine. The problem that I’ve been having with it is the SES comes on whenever I back off the gas when doing more that 60mph. The car still runs smoot...

    1992 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

  • 92 buick roadmaster 2 answers

    On my 92 buick roadmaster 5.7l tbi I've replaced a lot of parts on it but still have an issue... it starts right up idles fine revs up fine in neutral but when you put it in gear and try to give i...

    1992 Buick Roadmaster 4 Dr Limited Sedan

    -

    Maintenance & Repair

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 460
#2 Rowefast
Rowefast
Reputation 270
#3 Tom Demyan
Tom Demyan
Reputation 240
View All

Related Models For Sale

Used Buick Park Avenue
398 listings starting at $1,500
Used Chevrolet Impala
600 Great Deals out of 35,644 listings starting at $899
Used Cadillac DeVille
1,722 listings starting at $1,995
Used Buick LeSabre
17 Great Deals out of 1,949 listings starting at $1,588
Used Lincoln Town Car
36 Great Deals out of 1,795 listings starting at $1,495
Used Mercury Grand Marquis
30 Great Deals out of 1,784 listings starting at $2,250
Used Ford Crown Victoria
9 Great Deals out of 1,266 listings starting at $1,995
Used Cadillac Seville
355 listings starting at $1,200
Used Chevrolet Camaro
355 Great Deals out of 31,416 listings starting at $2,400
Used Buick Regal
160 Great Deals out of 10,573 listings starting at $4,000

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.