My engine is draining batteries. It starts and runs fine at first then struggles to start in future uses and will not restart if I stop.

Does the vehicle struggle to turn the engine over, or does it crank fine but just takes a while to start? If it sounds like its struggling with a weak battery, I would start testing circuits for a parasitic draw. You could have a short somewhere allowing the battery to slowly drain while the vehicle is off.

Is it getting spark? Have change spark plug?

Car will sometimes not start after warm. - CarGurus

www.cargurus.com > Questions > Pontiac > Grand Prix

CarGurusJan 2, 2013 - When i start my car, for the first time during the day- I have no problem.... When I go somewhere and shut it off, sometimes it won't resatrt. ... I have to keep my foot on the gas and rev it up to keep it running- then it's fine. .... When your carstarts fine cold, then fails to restart while warm, it is usually a coolant ...

Blazer has to be jumped, then i shut it off and won't start.

www.cargurus.com > Questions > Chevrolet > Blazer

CarGurusDec 21, 2013 - I jumped it and it ran fine, but as soon as I turned it off I couldn't start it again. No clicking just like the battery is drained. ... Then run the car for ten minutes and shut it off and if does not start, replace the battery. ... Blazer starts fine first time but after shutting off,has hard time starting-takes up to 10 key turns or ...

Engine Performance Problems Due to Crankshaft Position ...

repairpal.com > Problems > Mercedes-Benz > ML320

"Crank no Start" Due to Failed Crankshaft Position Sensor on Mercedes-Benz ML320... It usually ocurs after I've turned the car off and try to restart after about 15 minutes. I typically allow it to ... fine. Stalling and starting problems intermittent at first, but now more frequent. ... Car runs fine then without out warning it won't start.

I would start by having battery tested. If u remove it and take it to auto parts store they will test it for free. It could be that the battery will not hold a charge or your tractors alt. is not putting out a charge

Died on freeway and would not restart ? When you turned the key what happened ? Did the starter engage and spin the engine ? Or nothing happened . Why did you charge the battery ? Did you drain it trying to start it or it drained when driving the vehicle an it killed it ? Before replacing parts did you have it diagnosed or did you just replace parts ?
048 Engine Hard to Start or No Start Scan Data for Starting Problems If you don't know how to test ,your best bet find someone like this .

with the details that you have provided, it sounds like it may be either a ground, or ignition relay, but I've also encountered the same problem being the starter wire to the starter. The reason I think that is because of your dash lights coming back on .If you have use of a voltmeter you can test and see how much power is actually going to the starter An ignition relay could do the same, but usually won't interrupt the engine after it's running.

sorry scrap it

The altenator is bad. Not charging the battery and running the car. Once the battery drains the car will die. You can charge the battery and it will run untill it is drained.

Most likely, the problem is the wiring. Over the years, corrosion builds up in the ground strap and positive lead to the starter (from the battery).

or the battery is old or the the starter is dying get it test at a shop for free.

probably the vehcile speed sensor