Let me start with the recent repair history. I have just recently replaced the cylinder head and both manifolds as a unit(from salvage with the same from a 93 Plymouth Sundanese). I also cleaned and put a kit into the throttle body. After completing this job the idle was way off. I checked the vacuum system and found cracked and broken lines(hard plastic) and loose connectors. After replacing all the lines and connectors the idle was a lot better but still sounded fast(I don't have a tachometer and I don't trust the one in the instrument panel). I rechecked the timing and it was spot on(12 degrees ATDC). So I disconnected the battery and cleared the codes, then took it for a test drive. After driving it about 10 miles I pulled the codes and got a 12 battery code and a 21 O2 sensor. When restarting the car after it is at operating temperature the idle is real low almost to the point of stalling and black smoke comes out of the tail pipe, after a few seconds the smoke stops and the idle increase to about 2500 rpm before leveling out at about 1500(if I can believe the gauges in the car). What do I do next?
have the same problem?
Sunday, November 17th, 2013 AT 8:20 AM