My car is tweakin out' and not in a good way, plz help me figure out what's wrong.
 

Before you read this, my car is a s4 na with streetport (20k miles) and removed 5/6 ports full exhaust (no cat) , intake and no emissions.

Well i thought i fixed my jumpy tach and today it started jumping again, only way worse...the car also wouldn't start up after driving around and stopping at a gas station, i did the de flood procedure 2-3 times, gave up on that and push started the car easily ... so why wouldn't it start ? My car has also been feeling kind of sluggish lately ( it has been missing an o2 sensor but didnt seem to cause any probs unless it is now)

The car feels sluggish on takeoff , like i gotta give all the car has for it to accelerate decently...but at high rpm , itll rip right to the redline.

As a note, the car sometimes makes a beeping noise .. im not sure if this is a code the car is trying to throw to tell me what's going wrong..but the beeping seems to start as soon as i turn the key in the igniton

My theories - Could be a combination of these

1. Ground on coil needs to be cleaned (causing a short and making coil not produce spark)
2. Something is wrong with my key ignition ( short or something)
3. Throttle position sensor bad/needs to be adjusted
4. Coolant seal blown / Low compression causing hot start issues ( car doesnt smoke though)
5. Mass air flow sensor bad
6. needs a new clutch (has 20k miles on it centerforce dual frict)
7. need o2 sensor
8. need a new starter
9. Oil change (my oil is old but i kinda doubt it would cause this problem)

If the car feels sluggish at take-off, blame that on the removed 5th/6th ports. That is your variable intake system and allows the engine to have the proper amount of air during lower RPM range (gives you better torque down low). Since the car "takes off" at high rpm (should be above 5500RPM, that makes me think your just experiencing your loss of power due to removed 5/6th port system.

Your car didn't start at the gas station because it was flooded. Possibly heavily. A good push start will always get you running. To fix this, have your injectors cleaned and serviced.

The tach issue. The tach gets signal from on of your ignition coils. Make sure the connection from the coil to tach is in good condition. Look in the FSM or search here for more information on this as I don't have it out of the top of my head.

The beeping. Could be many things. Is it a beep or a buzz? Usually the car beeps when you first start it if I remember right (my car has been apart for a year almost!!!) so that is normal. If it beeps even after a few seconds of starting it could be something else....

Hope this helps.