this past week i finished up my LE2 cammed 355, but it has a pretty bad miss. im using the old opti from the last motor that had like 2 weeks of use and the icm, and coil were replaced as well. im running tr55's @ .50 and some cheap autozone wires till i have money for some MSD's. checked the wires and they are all fine and no arcing either, but the only thing that i can think of is that the O2's are fouled out. i drove the car home like 3 miles open headers and then left it on for another 2 hours after that. next day i had it on for another two hours and drove it like 5 miles. when it get up to temp it starts to surge and wont stay on, and when i drove it, it started to pop and miss real bad. cant figure out what's wrong with it, and i dont have access to a datalogger to scan the car. any help would be appreciated.

also the car has an oil leak at the back of the intake where it sits on the block, could that make the car miss as well?

 

Is the SES light on?

 

I am also chasing bugs on my new motor.

Seems simple, but check your plug wires again. Last motor we did, we spent a whole day adjusting valves and checking stuff, 2 plugs were crossed at the opti. Idled decent (monster cam) but ran like crap trying to drive it. Popping? Could be this...

I am doing plugs + wires soon, but I fear I will be replacing another opti