Car will not start?

4 days ago my car stalled out as I was driving thru approx 4-6 inches of flood waters.
Yesterday I went to pick it up from the shop the cops had it towed to and it
wouldn't start. The battery is good and it starts to try to turn over but it can't quite get
there. Any idea what could be wrong or what I should do first when I
try to fix it?

Good day, my car used to run fine until one day I was swapping my car battery and accidentally bridged the positive and negative terminals on my top post battery with the metal ratchet. I was using to tighten the bolts now the car will not crank or roll over. All the lights and horn and everything still work fine radio turns on and everything just will not crank. Already changed the starter hoping it would be the culprit but no change checked all the fuses and they seemed okay. Any help on this matter would be much appreciated. Thanks in advance.

My 1999 buick lesabre is heat sensitive. On hot days when parked on the blacktop it wont start. Acts like no spark as the engine turns over quickly and does not give any indication it is trying to start. If you pour water over the engine it fires right up and usually is fine. On really hot days it will run a bit rough on the freeway. I have changed the fuel pump and the electronic ignition module, the coils read within reccomended tolerances when tested with an ohm meter. Strangely the car even when it has sat for hours on the hot pavement feels very hot and steams like crazy when you pour water on the engine. It then starts up. Also never have any problem when the weather is cool.I live in redding california so 110 degree days are not horribly uncommon and have not doubt that blacktop temps exceed 150 degrees

I have been unable to determine the cause of the problem by using water to cool a part or by using a heat gun to apply heat.

A friend has a professional type scan tool (more sophisticated than the run of the mill OBD II. It reads recent fault codes reflecting high signat at MAP sensor as well as p1361 and p1362 which seem to indicate either a bad wire harness connection in the ignition system (though we could not find one) or an Ignition module or ecm failure.

Could the symptom be a bad MAP Sensor, where should I start?

I have a 1999 Buick Lesabre with approx 110k miles.
There is an ignition problem:

Sometimes it works fine.

Other times the Security light in the dash comes on and the car will not start.
Usually after waiting for a period of 4 or 5 minutes, the light goes out and the car starts normally.
Any ideas on what's going on with this?

Thanks
Bill

The car has been the shop. The ignition switch has been replaced. Several different ignition keys have been used with the same result. The person at the shop wants to try to convince me that the starter has a "dead spot". It always works fine when he is trying it.

After having to replace the upper intake on the car it will crank but not start. What could the problem be?

Car was running when it was parked, upper intake was replaced, all cylinders blew out several times, 150 lbs psi on all cylinders, have fuel and fire, but unit doesnt want to start. Wants to but will not start. Looked at GM website and it mentioned lower intake gasket deterioration after 60,000 miles. Car was running before repairs were done, could lower intake gsket be the problem?

No, but I took them out and put them in another buick just like mine and it cranked fine.

Car just wouldn't start one day. Only problem prior was she would hesitate when going up an incline when air was on. The cooling termostat had been taped on (used car I just bought). Replaced 3 cylinder coils still wouldn't start, pulled plugs and they were "wet" with oil. Changed those and also replaced the cooling termostat. She'll start but puts out heavy white smoke. Car runs smooth tho. HELP. Am I looking at a major fix? Seems like it!