Ok so my friend has a 2000 civic lx we recently swapped in a obd1 LS into it and have an obd2b to obd1 jumper to pr4 ecu. Initially we had a code 4 for ckp sensor and it ran horrible.After trying two dizzys we found out it was a problem internal to the ecu that was causing the code, so we changed the original pr4 with a p75 that works fine it was previously running in another friends car. Start it up no cel but car idles horribly from 1200 to almost where it dies and also is misfiring like crazy. Again there is no cel, does anyone have any input as to what would cause this condition or where to start proper diagnosis. Weve already replaced the plugs and tried two dizzy so far to no avail.