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98 rs
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Discussion Starter · #2 ·
duh...anyway what I meant to write was....
have sporadic p0303 and p0304 coming up every 2-3 days..(4-6 drive cycles) nothing felt...no rough idle...
205K on a 98 DOHC RS
 

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98 rs
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116 Posts
Discussion Starter · #5 ·
ok, all checked, everything...all ok. f
found a "tiny" hole near catalytic converter...tack welded...seems to have cured it.....we will see in a few days.
Thanks for the help
 

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A hole in the exhaust wouldn't set a cylinder misfire. Did you check the coilpack for any white powdery substance? Have your checked and/or replaced the spark plugs and wires? Are you burning off coolant? Do you get white smoke from your exhaust? Are there bubbles in the reservoir? Is there oil on your spark plugs?
 

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98 rs
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116 Posts
Discussion Starter · #8 ·
coil clean, tests out good...new plugs, wires...head gaskets done...no coolant level issues or smoke issues. Now just a tiny little sputter...every once in a great while.... went off came back on this am.... seems like @ thruway speeds the mis fire happens...because I dont feel it at all. cel comes on...on the thruway?!!! who knows right now...its driving me insane. Only cyl. 3 or 4.... maybe coil when hot...shorts ? I dont know
 

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My 98 2.5rs does the exact same thing. cyl 3 and 4 misfire. i dont feel any misfire, the cel just comes on every couple weeks. did u find a fix?
 

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did anyone find a fix for this just got my headgaskets done.. Heads rebuilt with delta 1500 grind in them every two to three days i get 303 and 304 code everytime and it only seems at start in the morning doesnt happen again when i clear it til 2-3 days later!!
 
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