Fixed Idle Surge,Now got a BAD miss,HELP

[BOBS90TURBO]

I took the ISC motor off and figured out the little end plunger piece came off so I put it back on and no Idle surging anymore,BUT then I realize I have a horrible miss, The miss is so bad the car can barley be driven, especially when it is cold, I had taken the entire throddle body off ,so could I have installed it wrong. I checked all the vac lines,gaskets,new plugs and wires,,,,,,,,,,PLEASE HELP,,,,,ANY IDEAS???
Also I heard a loud pop,click sound almost like a wire arc pop sound, coming from around the first injector close to the throddle body. Could this be a bad injector.

 

[DSM90AWD]

Check that all your intake hoses are tight and not leaking (from the TB to the Air filter).

Pressure testing your intake will help

 

[BOBS90TURBO]

I will make a leak tester pump in the morn. Also does anyone know if a bad ECU could cause a bad miss, I took mine apart and it has that fish smell and has one tiny burn spot next to the big cap.

 

[DSM90AWD]

oh yea.. the clicking sound could have been the ECU crapping out.
Get those caps replaced ASAP and hope the traces are not too badly damaged.

 

[BOBS90TURBO]

What are traces, and the loud click(pop) arching sound was coming from the #1 injector area, about 1 or 2 click(pop) sounds ever 30 to 50 seconds.Can a bad ecu make the sound happen???

 

[BOBS90TURBO]

lordpaxin suggested checking the plugs one by one and I figured out I had a plug wire not getting contact on the coil end, I had new plug wires but for some reason the end piece was bent in to small and was not contacting, I do still have a little idle surge but at least it is running smooth now, thanks for the advise all. BOB