View Full Version : Please Help......bad misfire

05-27-2007, 12:58 PM
I have an 89 RX7 5 speed, when the engine is cold if I start it up and floor it the car has lots of power and runs fine but after 2 min of driving if i give it anymore than 1/4 throttle or boost anymore than 3psi it will misfire very badly. But even when the is warm it will still idle just fine. When I put the car on the scan tool it shows codes 18 (spout conector) and 41 (oxygen sensor). Could the o2 sensors make it run that ~~~~~~? If I drive the car around like a grandpa will i cause any damage?

05-28-2007, 10:50 PM
well I changed the oxygen sensors today and found a spark plug wire that had came off somehow. it was a cheap fix but it should have been the first thing i checked. I wish I would have found that sooner.