It could
injector is bad
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.
Bad injector, head cracking, fuel system restriction, bad injector cups, or fuel pump seals.
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.
there is a few things it could be, it could be a dirty injector, a bad lift pump, the pump has to have over 12 psi at idle or you injector pump might be going out they usually run $1250. those could be your posibilities.
is this a gasoline or diesel engine if it is diesel you have a bad injector, or the fuel pump is bad if it is a gasoline engine, you could have a bad injector, a bad spark plug,bad plug leads, timing is wrong,bad ignition points or bad distributor cap those are a few to start with
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.
its bad to do it , but try a full system cleaner , it may solve it. That wouldn't cause any fuel injector issues, put it does cause the pump to run warmer which can shorten its life. The pump sits inside the tank in the fuel. If the tank is above 1/4, the pump is cooled by the fuel as it runs. A cool pump is a happy pump.
There are many possibilities. You could have clogged injectors, or even an intermittently bad fuel pump. try running injector cleaner through your car. Fill the gas tank to the top and put one bottle of injector cleaner in. Next time you fill up see if it solves the problem. If not, have the injectors cleaned, or the fuel pump and or filter looked at.
the harness could be bad on that injector chech to see if its firing and if it is then the injector is bad
this is most likely a bad injector. Try a tank of premium gas and Lucas injector cleaner. If it still misses, you probably need to change an injector.
Its a manual / mechanical fuel pump. To check it remove it a look inside. It will be obviouse if its bad. More importantly if its running its not bad. There are no injectors on a 87 Grand Wagoneer. Its corroborated.