My Buick suddenly runs rough most of the time (whether cold or warmed up) and likes to stall when approaching stop lights or taking off. When it stalls, the security light flashes. Also, if I am able to get off the line without it stalling, it will run very rough when accelerating and is seriously low in power. Help!
Having a qualified repair shop do diagnostic's on the vehicle would be your best bet . Could be any number of thing's ,engine mangement system sensor's , fuel system , ignition system , engine mechanical systems etc.... Could be as simple as just needing spark plug's & wire's , fuel filter . But , some testing should be done by a qualified technician with a professional scanner .You don't want to get into a guessing game , one person tell's you it's this or that , because without doing testing they are just guessing .
011 Fuel System Tests Fuel System Scan Data
012 Ignition System Tests Start Here
these videos are just to show the complexity of these computer systems .
SOURCE: 1995 buick regal 3.8 stalls
Check the remote positive battery terminal connection. It's located on the driver's side of the engine bay just in front of the battery and just before the strut tower on that side. A lot of times, the terminal becomes loose and causes the issue that you've described. Fully remove the terminal and inspect it underneath. I've seen several of these that metled the plastic around the terminal so badly from that they stopped making good contact with the actual post. Being loose causes a lot of resistance and heat(which will eventually melt the plastic).
SOURCE: 1990 Buick Century 3.3L Check Engine Light comes on, stalls.
Need to check for fault codes. Possibly a faulty sensor causing the fuel system to run rich or lean.
SOURCE: 1991 buick regal starting and running problem
Sounds like your car is overheating. If you have a temp gauge it should show that. If you just have an idiot light, by the time it comes on it's already too hot to operate. AFTER the car is cooled down, open the radiator cap to see how much coolant has been lost. Chances are there is alot missing. Add WATER (no sense in adding coolant if it's going to leak out) and idle the car at home. Look underneath as it warms up to find where the leak is.
SOURCE: I have a 1991 buick regal stalls and shut off after warming up
egr valve is not opening up when the engine reaches it normal operating temperture
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