I have checked a few things out, and I need to know how to fix this problem....I know running to lean with cause detnation.....When I checked the ecu, the code came out as 45....which is system running lean/rich.....I know its lean by the smell and by the temp. What can be done to solve this problem? The car doesnt really run bad...a little ruff idle but other than that, its fine. Any ideas would be greatly appreciated.