Where is fuel injection sensor for 1998 m k triton

Signals from the cam an crank sensor's . Unless anti-theft system light is on , then it won't inject fuel even if cam an crank sensor signals are there . Do you have SECURITY light lit on the instrument cluster ?

check the crankshaft position sensor

use a scanner to help you identify the problem. You have identified the fuel injection system as being the problem by introducing has into intake during cranking. The fuel injection is signaled by the crank and cam position sensors. check for dirty or loose connections at these sensors.

http://troubleshootmyvehicle.com/gm_fuel_injector_4.3L_5.0L_5.7L/spider_fuel_injector_1.php

P0171 - Fuel Injection System Too Lean Bank 1
Possible Causes:
- Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection

P0174 - Fuel Injection System Too Lean Bank 2
Possible Causes:
- Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection

P0174 - Fuel Injection System Too Lean Bank 2 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem. P0171 - Fuel Injection System Too Lean Bank 1 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.

P0401- Exhaust Gas Recirculation Flow Insufficient Dectected
Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR passage clogged
- Exhaust gas leaks Possible solution - Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve
Code P0171- Fuel Injection System Too Lean Bank 1 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem P0174- Fuel Injection System Too Lean Bank 2 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.

Plug the computer on to the port located under the dash on the drivers side to get a code reading. It sounds like a 02 sensor about to go bad. If you get a 700 area code, its a transmission sensor code.

check for plugged fuel filter on the frame rail on driver side, blow through it to see if it is plugged. also have fuel pressure checked if it is below 60 psi replace fuel pump

have you checked the coolant temp sensor? not the sensor for the gauge . the coolant temp sensor for the fuel injection. this sensor when cold tells your fuel injection system to add more fuel. in other words it acts like a choke in a carb. when this sensor goes bad it can send a signal constantly telling your computer the motor is cold therefor it needs alot more fuel than it realy does. also that sensor is tied into the 02,s. hope this helps.

does your regular service includes the injection pump being brought down for cleaning and maintenance?

it is an injection pump problem. inside the injection pump are valves and strainers that are not accessible for regular users. they could only be cleaned or replaced by these people who work with injection pumps and they would calibrate the injectors also so that it would not be blowing black gas and uses excessive fuel.

tnx 4 using fixya,

drcool