Hello, I've recently buy a Mustang GT 96, and have the codes P0172 / P0175. The engine is not running so bad, but it's hard to start when it's cold. I did the follwing to try resolve this. Actions : Changed the Fuel Filter Check the Long Term Fuel : -25% on both bank Fuel pressure : 31 PSI Fuel pressure without vaccum : 40 PSI Fuel pressure holding 15 min : 30 PSI MAF Cleaning Spark plugs changed Spark plugs wire changed PCV Valve to throttle including hoses Seafoam in tank (1 can) Changed the injectors Observations : When the engine is cold, the starter crank 2-3 seconds and finally engine start. When I prime the pump more than one time, the engine starts right on. When engine is warm, it's starting well. Engine is bucking at low RPM when I push gaz pedal more harder. - SOLVED The exhaust gaz smells gaz, but I like that ! Engine is leaking from the oil pan, and from the crank Fuel consumption is about 420 km / tank Car have no mufflers Get some idle problems, but the car is able to stabilize it. - SOLVED Does the fuel pressure is a little bit low ? Does the codes could be related by this ? My goal is to get rid of thoses codes and setup the engine more efficient without throwing all my money. Your help will be welcome ! Thank you !