Confused..Dont know what happened. would love help!

[streetnissan240]

the other day i was driving and my engine like went off it was weird. it is easier to understand if i told you the whole story. But first it is a 92 nissan 240sx se ka24de with CAI, upgraded ecu, upgraded plugs and wires, header, test pipe and muffler. it has 189,000 miles on it also.

Okay i was on the highway and i went onto the interstate i was driving int he fast lane and i was going i believe 90 in fourth gear i believe it was. (not redlining) and all of a sudden my engine like stopped. the throttle was not working at all. and i thought i staled so i tryed to crank it and the starter made the loud noise that says it is already running.lol so it was rolling, so i put it in neutral and roll off onto a exit and went to side of the road on the exit. i shut the car off. then went to crank it.. nothing. looked at my capacitor ( that goes to my speakers.) it said 14.5 volts. so my battery was not dead. i popped the hood and looked at my oil cause it does leak a little. and it was fine and was a clearish color cause i just changed the oil. i went back inside my car and tried to crank it again. this time it turned over and was not idle. the rpms was moving like crazy from 0 to 1500 rpms. then i hit the gas and then there was a loud pop and white smoke flew out of my exhaust and the engine shut off. i then looked back under the hood checked all the fluids, vacuum lines, and all. they all were fine. so i went back an tried one more time to crank it. this time it cranked right up. i then moved it to a parking lot with a street light. i kept it running, and it was idleing fine at 1000 rpm. i revved it up a couple of times. then i drove around the parking lot, and also drifted around the lot and burned out.(in other words i was redlining it!!) and it was fine. so i went back on the interstate and i would not go over the actual speed limit.

I am wondering wat prolly happened and if it is bad. and if it is actually safe to drive around?? Please help me. I would appreciate it!!

Modified by streetnissan240 at 10:06 PM 4/27/2008
Modified by streetnissan240 at 10:59 AM 4/28/2008

[danielsan]

damn son thats one crazy idle at 10,000rpms

not sure what happened but if its running fine now then it sounds like a wiring problem maybe the coil is going out??? happened to my 89 prelude somewhat, the car died and i tried to restart it and it popped real loud and had a nice back fire from the intake.

[Rucca]

Similar to what happened to me before my crank angle sensor went out.

Check for codes. What is your upgraded ecu?

[streetnissan240]

yea i put too many 0 in the rpms i changed it. lol.