Twitchy RPM's stuttering, loss of spark

[oplix]

I have a problem. This started happening a couple of days ago when I went WOT in second gear. My car will run fine, warm up, and then it will start misfiring. My Wideband will lean out completely, Tach will start getting twitchy when I push on the gas, and I have noticed when the car is running in this condition, if I disconnect my spark wires from coil #2 (closest to tbelt) there will be no spark in that coil. The other coil however, has constant spark. Before the car warms up completely, both coils have spark. I have checked for visual signs of ECU damage and have found none.

Can anyone help me further diagnose this problem? The only CEL code that I have is the p300 which is random misfire.

Thank you.

 

[95'RS-T]

well since no one else said it. change your plugs, wires, and coil or check your spark plug gap.

 

[dsmloverguy90]

coils tend to go bad when they are hot. warm the vehicle up and check for spark on that coil to see if it is bad. good luck.

 

[boostforfun]

Also, make sure all the grounds are clean on the engine to car, and everywhere else you can find them. Bad grounds make DSM's do funny, funny things...

 

[oplix]

I replaced the coil pack and it fixed the problem. Thanks.

 

[oplix]

it seems my problem has come back today. It's doing exactly the same thing, once car warms up, coil pack #2 stops producing spark.

 

[Brutal_r3drum]

mine would do the same thing... not 100% sure if it fixed it(found more problems) but i redid all but the ecu... this is including the plugs, wires, coil packs, and the power transistor...

 

[boostforfun]

Are the coilpacks getting very hot when you are having the problem?

 

[Lofty]

Leaking caps in the ECU?