Possible failed injector.
If it is just one injector, it is a bad injector or a problem in the wiring harness or connector for that injector. If it is all of the injectors, it could be a fuse, the entire injector harness, a broken loose or unplugged connector on the injector harness, or the fuel pump or fuel pressure regulator.
the harness could be bad on that injector chech to see if its firing and if it is then the injector is bad
it is your black roll with same kind o brown staf
Assuming this is a diesel engine, the electrical connection for the injector harness where the harness passes through under each valve cover is known to fail. The connection is part of the valve cover gasket and is easily replaceable. When you remove the valve cover from the bank that is giving you trouble, you will see the problem at the electrical connection.
If the problem followed the fuel injector then it is a bad injector. If the problem stayed at the same hole with a different injector then it could be bad wiring.
crankshaft position sensor
Feel the exhaust manifold at each cylinder as it is running, if an injector isn't working the manifold at that cylinder exhaust port won't get hot. Some of those Ford diesels had a problem with the electrical connection where the injector harness passes through the valve covers.
you could have a bad fuel injector if dirt gets into the injector it will stay open
the problem with your truck is either the battery does not have enough cranking amps, or the starter is beginning to wear out. first time i ever had this problem i put a higher cranking rated battery in and that solved the problem
No it is not a fuel pump problem. It either has a grounded are open circurt. Check wiring to injector. May just be a bad INJECTOR.
If your check engine light is on replace your camshaft sensor if your check engine light isn't on it could mean theres a fuel problem you may have a clogged injector or a fuel pump going bad
polo 1.2 is cranking but no fire