I have had my s70 to the shop many times now for a check engine light. The code is 4-5-4, misfire on #4 cylinder. The shop just can't find anything that is causing it. The latest thing they tried was to replace the o' ring on the oil pump, thinking that was causing the compression to leak off. That didn't work.
Could it be the fuel pump causing this? Would a fuel pump problem trigger this error code or does the fuel pump have it own code.
The symptoms I am seeing are excessive cranking when we start it. It will crank for a good 15 to 20 seconds before finally starting. When it does start it usually expells a small cloud of smoke then we are fine. The engine seems to run normal. I haven't seen any loss of horse power and it never stalls. It is just really hard to start and the Check Engine Light is on.
Any thoughts?
Could it be the fuel pump causing this? Would a fuel pump problem trigger this error code or does the fuel pump have it own code.
The symptoms I am seeing are excessive cranking when we start it. It will crank for a good 15 to 20 seconds before finally starting. When it does start it usually expells a small cloud of smoke then we are fine. The engine seems to run normal. I haven't seen any loss of horse power and it never stalls. It is just really hard to start and the Check Engine Light is on.
Any thoughts?