Hello i just picked up my 3rd sc400 dirt cheap ($2200) because it has a engine problem. When I first start the car in the morning it seems to be running on only a few pistons really ruff idle blue smoke out tailpipe smells strongly of fuel. As it sits there warming up it seems to pick up a few pistons and runs alittle better, and then when its fully up to operating temperature it runs great, faster then my other sc400 with no hesitation!
Ran the check engine codes and it is storing DTC 13 and 41. Since I have another running car sitting next to it I started swapping over components to test for the problem. TPS, IAC, both ignitors, MAF, coils... nothing made any noticeable difference. I have been reading on the forum that code 13 is the rpm circuit which originates from the crank sensor and uses both cam sensors to check the timing. My tach works fine so I assume the crank sensor is working ok, but I don't know about the cam sensors.
My question is first am I looking in the right direction? Has anyone else had this problem before? Is it more likely that the cams sensors are, broken, missing, bent, unplugged, or is it more likely that there is a wiring problem in the harness between the sensors and the ECU? Is it likely that the ECU has a problem?
Since the engine runs so well when its warmed up I can pretty much rule out that there is actually a timing belt problem, or other ignition problem. It seems to me that it must be some logic or sensor problem that either goes away when it gets warm or is only part of the engine warmup sequence.
Any thoughts are greatly appreciated,
-Jake
Ran the check engine codes and it is storing DTC 13 and 41. Since I have another running car sitting next to it I started swapping over components to test for the problem. TPS, IAC, both ignitors, MAF, coils... nothing made any noticeable difference. I have been reading on the forum that code 13 is the rpm circuit which originates from the crank sensor and uses both cam sensors to check the timing. My tach works fine so I assume the crank sensor is working ok, but I don't know about the cam sensors.
My question is first am I looking in the right direction? Has anyone else had this problem before? Is it more likely that the cams sensors are, broken, missing, bent, unplugged, or is it more likely that there is a wiring problem in the harness between the sensors and the ECU? Is it likely that the ECU has a problem?
Since the engine runs so well when its warmed up I can pretty much rule out that there is actually a timing belt problem, or other ignition problem. It seems to me that it must be some logic or sensor problem that either goes away when it gets warm or is only part of the engine warmup sequence.
Any thoughts are greatly appreciated,
-Jake