just built the car and was driving for 3 days... IM LOST! NEED HELP!

[AWDrivinIT]

Ok here the deal i was driving down the street not beating on my car at all and i was in 3rd gear and the car felt just it just jumped and it kinda threw me forward a lil bit and i was like what the hell is that so i kept driving and it didnt do it again till i was sitting at a stoplight and i started to go and as soon as the rpms hit about 3500 or so it just kept jumping and chugging and i remember looking at the cluster and the rpm needle just dropped to zero and then shot back up then back down and so on and then the car just died so i overlook the car and i notice that my 30 amp iginition fuse is blown so i replace it about 4 times and everytime i go to turn it over it just blows the fuze like nothing... so i got it towed home back to my house started going threw it again trying different stuff and i thought i had it fixed ### it wasnt blowing fuses and was running fine so w/e i back it out of the driveway with no problems at all as soon as i put it in first and start going it starts jumping and the needle fell down and back up just like the last time so im seriously lost i have no idea but the thing is now its not blowing any fuses it just doing the dieing thing so if anyone has any imput or could help at all i would greatly appreciate it...

 

[olmytsi]

Do you have a check engine light?
What exactly did you check?
So now it starts, runs but when you try to drive it it dies or does it die as soon as you start it?
Just check all the obvious stuff like ecu, maf, coil pack, wiring under the hood and around the ecu.
What did you mess with that cured the fuse blowing problem? You should look there.

 

[94Jettameowpsst]

Just by describing what your needle is doing, it sounds like you have a bad computer

 

[turbo2g111]

check your Idle Speed Sensor, mine went bad on me and behaved similarly

 

[N1balla16]

Did you plug your maf sensor back in?

 

[burntheblobs]

It sounds a lot like your ECU man. Next time that happens, listen for a fast clicking sound coming from your center console. If you hear it, it is definitely your ECU.

 

[AWDrivinIT]

ok to answer everyones questions i do not have the mass air flow unplugged....there is no check engine light showing at alll... and so far for what i have checked was i did a run through of most of the engine bay wiring looking for any bare wires and i also rip the whole under neather of the dash off and checked just about every wire in there everything seems to be fine....the car starts perfectly and will idle for as long as it has gas and i can sit there and bounce it off the rev limiter if i wanted to and nothing would happen but when i start to drive it as soon as it hits about 3500 it seems like all the power cuts off and the car does a hopping kinda thing ### its chugging...

 

[AWDrivinIT]

It sounds a lot like your ECU man. Next time that happens, listen for a fast clicking sound coming from your center console. If you hear it, it is definitely your ECU.

thats exactly what its doing man it clicks every time it falls on its face... ive owned many dsm's before and pretty much know most of my shit im not new to this but i have never encountered anything like this at all... any other suggestions before i go out and buy a new ecu... i guess i can look at it on the positive side ill atleast get a socketed e prom with a stutter box... building boost off the launch sounds pretty fun...