Engine stops

Hi:
Check the power brake booster. Remove the vacuum line and plug it. Check if the engine dies when you hit the brakes. If it doesn't check the hose for damage or the booster. Replace as needed. NOTE: You will have no power assist with this disconnect, so don't drive the car until repairs are made.

this guide will help

https://www.2carpros.com/articles/engine-stalls

Please run down this guide and report back.

Thank you for this post I had this problem and had to fix a vacuum leak thanks to the guide. all fixed I love this site.

Electrical problem
1996 Buick Roadmaster V8 Two Wheel Drive Automatic 210k miles

Hello,
I am looking for help with a problem where my vehicle simple shuts down as I am driving down the road. No coughs or sputters it just stops running. When this happens I have no spark. If the engine is not quite up to operating temperature it will often restart and let me drive alittle farther. Then it will shut down again. I can only get about 6 or 7 miles from home before this occurs. It has gotten intermitently worse as time goes on. I have replaced the fuel pump and harness in the tank, the fuel filter, the ignition module, the coil, and the crankshaft position sensor. All of this within the last two weeks and the condition continues to worsen. I have the LT1 5.7L engine. It runs fine when it is running. Any help will be appreciated.
Thank-you,
Ron

The distributor and cap were recently replaced new.
It appears that there is no spark from the coil

Check the primary circuits at the coil.

Hello again,

When the car will not start there is no hot to the coil.

Check the pcm/ign fuse, I believe it is in the underhood fuse box, 10 amp fuse. The voltage to the fuse is ignition feed, goes hot when you turn on the key. Could be the ignition switch, the wiring circuit to or from the switch. The circuit from the fuse to the coil. Check for voltage at the fuse circuit first.

I have a 95 Buick Roadmaster with 130,000 miles 5.7 ltr v-8 / LT1 I replaced the Opti,coil wires,plugs,altenator,water pump about 2 years ago and I have regular oil changes including a recent fuel filter change. Tranny filter and flush coolant flush all within the past year.

The car stalls usually in Park at idle or in drive at stop light. It acts like the idle is low or to low and then it stalls. Restarts with no problems. Idle RPM is 575 to 500 RPM.It also stutters and shudders off the line and is made worse if I gear down.

I have a XRay 6000 and I have cleared a code in history related to the MAF and it keeps coming back in history but not current codes.

The exhaust sound is vey rough ,kinda a puh puh puh sound, but listening to just the engine; it is running smooth.

Totally lost but I have taken it to 2 mechanics and got it needs a new Opti and the other said new Cats and and O2 sensors and I talked to another and he suggested a speed sensor or the IAC valve may need replaced.

Any idea on where to start?

[quote:52caec7faf="usecom"]I have a 95 Buick Roadmaster with 130,000 miles 5.7 ltr v-8 / LT1 I replaced the Opti,coil wires,plugs,altenator,water pump about 2 years ago and I have regular oil changes including a recent fuel filter change. Tranny filter and flush coolant flush all within the past year.

The car stalls usually in Park at idle or in drive at stop light. It acts like the idle is low or to low and then it stalls. Restarts with no problems. Idle RPM is 575 to 500 RPM.It also stutters and shudders off the line and is made worse if I gear down.

I have a XRay 6000 and I have cleared a code in history related to the MAF and it keeps coming back in history but not current codes.

The exhaust sound is vey rough ,kinda a puh puh puh sound, but listening to just the engine; it is running smooth.

Totally lost but I have taken it to 2 mechanics and got it needs a new Opti and the other said new Cats and and O2 sensors and I talked to another and he suggested a speed sensor or the IAC valve may need replaced.

Any idea on where to start?[/quote:52caec7faf]

my car cranks and seems like it stutters for gas, then dies. and even when it stays cranked, when i touch the gas or throw it in drive or reverse it cuts off.

i would check fuel pressure and the fuel filter. If those check out all right check the distrubitor. What engine does it have? have you have a tune up lately?, is the service engine soon light on?

1995 Buick Roadmaster Automatic

what does it mean when the car stops running even though it has gas but when i put more gas it starts up immediately until i run the gas halfway again and it stalls out is there a such thing as bad gas?

I'm no expert but I believe that small amounts of dirt and other contaminants can over time build up in the bottom of your gas tank which would probably stall your car.

It's also possible that water got in your gas tank because water is more dense than gas so the gas will stay on top so maybe when you have a half tank left you really have a half tank of WATER. Hope that helps.

just replaced coil,rotor,module,cap and wires and my 93 roadmaster engine died. Before it stop running I noticed that the voltage meter would drop from 15 to 13 on the meter. but everything worked

does it try to crank over at all or getting nothing from turning key?

yes it turns over but will not crank

will have to test the fuel pressure to see if getting proper fuel and make sure spark plugs are getting healthy blue spark

the fuel pump is working properly....what's next?

plugs getting good spark? if so then test compression at cylinders.

I have a 93 Roadmaster . Yesterday while parked at the store my car cut off. I sarted itt back but it shook a little . i got out and notice a smell like something was burning but my vehicle was not running hot. I took the car home and noticed my battery voltage jumped to 19 volts. In the passed I have noticed that my Infl rest light flashed on causing my car to act as if it wanted to stall when i pressed the brakes. Could the two problems be related

With engine running, that should be alternator out-put. Have the alternator tested, sounds faulty to me. You also need to make sure the battery has a full charge. The generic spec for a full charge is around 12.6 volts, measured across battery posts, everything,engine, off.

Engine Performance problem
1992 Buick Roadmaster Two Wheel Drive Automatic 135000 miles

car is cutting off when in reverse and the gas hand is not working what could be causing this i have put a new battery and this is still happening

You could have a fuel pump problem but you would need to test it with a fuel pressure gauge to determine that.

My buick reacts as thouth it is starving for gas when I turn to the extreme right, or left, and press hard on the accelerator.
As long as I am going straight, I can stop in the middle of the street and press hard and it reacts fine,
however if I turn it stall, stumble, or shut down all together.

The power steering system shouldnt drag enough to cause that kind of problem with a V-8. Does the engine idle a little low ? At that mileage it may need the Idle Air control valve cleaned along with the passages for it.This will stabilize the idle quality and should help. You can try wiggling thewiring harness under thehood as well to see if it causes the engine to stumble or die.Sometimes bad connections can do what you describe.

I have a 1992 Buick Roadmaster it works just fine has alot of horse power but after driveing it for about 20 or 30 min it like wants to die out on me at a light? I noticed that if i hold the break and giveing it just a lil bit of gas as in to make it idle a lil higher it wont die on me
It dont over heat or smoke it has no knocks or leaks what could be wrong with it???

Hi, how long since a tune-up? Any trouble codes? You may need to clean the throttle-body and check iac- idle air control.