4 Wheel Drive/SUVs: 1989 isuzu trooper wont start, vacuum lines, isuzu trooper


Question
I have replaced the fuel pump, fuel filter, Engine relay, all 4 fuel injectors, I finally rerouted the vacuum lines properly. I also disconnected the battery to Reboot the engine control module, (all suggested by friends and neighbors). She still won't start. What do I do now? Thank you very much.

Answer
Larry,

You've replaced a lot of parts.  Most of them will contribute to a rough running engine, but not necessarily stop it from starting.

The 2 items that will kill an engine is lack of fuel or no ignition (spark.)

Before replacing parts (a very expensive way to check out the problem,) you need to purchase a repair manual (usually $20) from a local auto parts store.  These manuals are great for trouble shooting.  

You can find out how to test many of these components before replacing them.  Check for proper fuel pressure.  May be nothing more than a plugged filter or fuel line.  Check for spark.  Could be a bad connection, wire, ground, distributor cap, coil, etc.

Go slow and read the manual.

Don't replace parts until they are checked out or tested.

Carl