KrazyRob
10+ Year Contributor
- 77
- 0
- Mar 19, 2012
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MODESTO,
California
99 GSX. Im getting a PO300 code every so often.. with in like every 70 miles or so.. i have 97 gst that runs fine.. so i did a few quick swaps on parts one at a time to see if the intermittant code would pop up.. so far i swapped out the coil.. that didnt work so i swapped out the ignition module and that didnt work... i have not changed the plugs or wires yet as they are in good/ new condition but i guess that is next.. but would plugs and wires cause a " multiple" random missfire on ALL cylinders for a few seconds, throw a code, spudder, and then run perfect leaving the CEL on and code stored? Wondering if my ECU has a random problem going on.. how would i fix that? Sucks cause im kinda tapped out $$ right now...and re flashing ecu would suck.. Also would a straight 3" open exhaust cause this? There is no Cat or restriction... thanks..