It's getting good fuel pressure and starts up,but just won't stay running.
SOURCE: 1997 buick lesabre, engine light stays on
The are many things that can cause your "check engine" light to stay on. One possibility is that although you have fixed the trouble code for your crankshaft position sensor, the code has not been erased from the computer's memory. Another possibility is that you have another issue going on that is causing a new trouble code to come up. You're going to need to have your car hooked up to a ODB-2 engine code reader to see what the issue is. These code readers are available for purchase at any auto parts store. In addition, many of your local auto parts stores will check trouble codes as a free service to customer. If not, many parts retailers offer the option to rent one of these code readers. Which ever way you decide to go, run a full engine/emissions trouble code check. If the only code that comes up is the code that came up previous to fixing your positioning sensor, then all you need to do is erase the trouble code from the computer's memory. (Most code readers have the option to erase trouble codes, but if you're going to rent or buy one, I would suggest that you check to make sure that the code reader that you're getting is capable of erasing trouble codes as some code readers only indicate the codes and will not remove them from your computer's memory.) If your trouble code scan reveals other codes, then you'll have to fix and erase them as they arise.
FYI- In my experience, I've noticed that 95% of the time that a check engine light/trouble code arises that it is usually an emissions problem (oxygen sensors, mass air-flow units, MAP sensors, etc.). However, General Motors products are notorious for getting trouble codes for having loose battery/ground connections and for having worn-out fuel caps. With any GM vehicle, I always check these two things first to try to save me from having to look further than I need to.
Hope this helps! I'm sure once you've scanned your cars computer and erased any existing trouble codes, that you'll stop being annoyed by your check engine light, as I know how bothersome it can be. Have a great day!
SOURCE: Buick Regal dying
You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.
SOURCE: Car won't start Buick Lesabre 1998
Fuel pump is in tank, but ck the crankshaft sensor front of engine near pully for proper connection
SOURCE: 2000 buick lesabre no fuel system pressure. new
Your PATS security system is faulty...check the BCM up above the glovebox...Seems I've told you this before?
SOURCE: IS THERE A FUEL PUMP FUSE V 6 1997 BUICK LESABRE
Yes, it is usually 25 amp (Yellow). There is also, a relay for the pump. Most of the fuses are under the dash...you can check your owners manual to see exactly where the fuse panel is located. The relays are under the hood. If the relay is working properly, you will feel a clicking motion while letting someone else turn the ignition on, but don't attempt to turn it to start the engine since this will cover the noise that you are listening for. If you need to know which relay is for the fuel pump, you can ask at the Auto store. They should be able to help. If the relay isn't clicking, you can tap it lightly with a screwdriver handle to get it to work; however, if the pump isn't running and is original; it is most likely bad and some test needs to be done to confirm that before taking the pump out.
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