engine misfiring

hey everyone well i drive a 96 camaro rs with the 3.8

when i start the car it seems to need to warm up because if i step on the gas right when i start it up it misses and runs bad but once it warms up its fine

but back when my didnt move i let idle for a while while i was workin on my audio stuff it would misfire after about a half hour or so

also in the rain if i drive long enough in it it will misfire terribly i have a k and n intake that i think might be sucking in water i dont have an o2 sensor i am wondering if i need to replace coils spark plugs spark plug wires not sure any help would be nice

thanks
ryan

[Phantom409]

I would check the plug wires and make sure you don't have one or more arcing or burnt.

If you can check the spark make sure you are getting a nice white/blue spark and not a orange/yellow spark.

[98blackbeauty]

Those are classic o2 sensor problems. You said you don't have 02's did you delete them and reprogram ecu? or just remove and plugs.
I would :
1. check plug wires as someone stated.
2. Check plugs.
3. deal with 02 sensors. Depends on how their deleted.

[NoeL]

i think i just removed them for the exhaust or the cold air intake it runs better without them i never messed with the computer though so unsure of what to do

[NoeL]

i would not mind puttting the stock intake on if i could find one though

[Kwazrollinz28]

Good luck, I see lots of stock 5.7L intakes but last time i seen one of those big ugly 3.8's for sale was awhile ago.

My 3.8l had your problem and my car looked like yours it was my mass air flow sensor

[lozanoa11]

what o2 sensors did you remove???? the ones before the cat??!??!?! Put them back in now! w/o it, it will just run open loop. And spray some water at the wires at night and look for sparks