Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Have a 2014 Ford Fusion 2.0 that has a crank no start condition. Everything Checks out but while cranking the desired and actual fuel rail pressure jump up to 1599 psi. Originally the low pressure fuel sensor was bad so I replaced that and the rail pressure sensor. What would cause such high pressure while cranking?
Appreciate any help!