Car diesels, has low voltage sometimes, normal voltage sometimes
 

My car is acting like **** here lately. I had to replace a caliper, pads, and rotor last weekend cause the caliper got stuck, and ever since about 2 days later it has acted like crap. I'm without internet at home so I'll try to describe it as acurately as possible. So here it is:

Two trips after we changed out the brakes the ABS light comes on because the voltage dropped.

Voltage drops randomly, completely for each trip, so it's either good, or bad. When it's good, it is in the 13.2-13.8 range, and when it's bad it is in the 11 volt range. Random on whether it's good or not.

On Friday night it drove home 3 hours fine from college, got to my gf's house and it wouldn't start up, had to unplug the fuel pump relay, then it starts up. When it wouldn't start up the fuel pump wouldn't even prime. On the way home it died on me and I had to unplug it again and plug it back up. I took the plug apart, cleaned it and bent the brackets out on it and now it has no problems starting, but diesels after you run the car for anything more than a minute or two. Car diesels for just a few seconds then stops.

All this started this weekend so I'm hoping it's one thing affecting everything else, and something small. So any ideas and how could I test whatever it could be?

I dont know exactly what "the car diesels" means, however it does sound like you have a bad fuel pump. Check the fuel pressure.

That means that it runs after you turn off the ignition.

In order to have "run on" after the engine is shut off requires 2 things. Fuel and heat. Heat is usually due to having large amounts of carbon deposits built up in the cylinders. Using a product like Seafoam or even better BK will remove the deposits.

The confusing part is the fuel part of the equation. When the engine is shut off, fuel should stop. Unless you have a leaky fuel injector and probably more than one. The first thing you should do is pull up the fuel rails with the injectors connected and jump the fuel pump prime connector to power up the pump and pressurize the fuel rails. Then look for injectors leaking. Once that problem is repaired, then Seafoam the crap out of it.