somethin wrong with my 5s, rpm jumps and drops Options

[mikew04]

while driving my car in any gear or nuetral, or any throttle position, my engine will sporadically jump and die. the tack will flick up 1 or 2k rmp from what its at, then flick down to zero, and go back and forth really fast. this is happening for about five seconds or so at a time, and every few minutes. it occurs less often when the car is warmed up. the tach seems like its reading the rpms right, the car will jolt back and forth when this is happening, and the car wants to die on me as the tach reaches zero. when the tach goes down the check engine light flashes on, like it does if you stall. i checked for codes, and its not throwing any. i have a spark on all cylinders, and my spark plugs were replaced and gapped correctly. i checked the power connections and the grounds and everything looks fine. this is making it really hard to drive the car, especially in this weather. thanks for any help.
-mike

[mikew04]

Its a standard..
this thread and this one are about the same problem that i think im having, but there was no clear answer. what exactly is the auto air bypass valve, and what does it do? Im still thinking it has something to do with the ignition wires in the dash that i cut to put the relay in, not only bc of the problem im having, but also the fact that it just wont start sometimes. lights will come on, but the starter wont turn. its totally random. i cut both the starter wire and ignition wire in the dash bc i wired the relay to the ignition wire first, but the starter would still turn, so i then wired the relay to the start wire. i dont know why BOTH connections would go, but im going to redo these connections to see if the problem is fixed. but if this is not the problem, i would like to have as many ideas as i can as to what would be wrong. im only able to work on my car for like a weekend at a time, and its a real pain.
thanks again for any help
-mike