Have you had it plugged into an OBD scanner to check it isn't a sensor causing the issue? Sometimes something else can trigger a "No Start" issue like a bad sensor or a faulty immobiliser.
The two most likely reasons for the starter to do that is - 1. a weak or flat battery or - 2. A bad starter motor. Check the battery is fully charged, (somewhere around 12.6 to 13.2 volts). If the battery is good it is more likely to be the starter motor. On a 2001 model it mght be the original factory starter. They do wear out and fail especially on high mileage or high compression engines like diesels.
That 'Click' noise is probably the Solenoid switch on the starter working but the motor isn't turning like it should.
One has to check the fuse for Instruments. When it failed you check any cable for wear marks and the chance it shorted out against some ground. Next the main plugs for power to be in good condition and not being corroded. Sometimes the cables break where they are clamped on a cable lug and one can then easily pull them out of a connector. It can be a bad connection to ground, where ground cables connect to a larger wire. Ignition switches can fail and have connections for many functions with plugs down below. It should be any of these causes.
Your ISUZU D-MAX 4JK1 engine's low RPM may be a sign of a number of possible problems. The following typical causes and troubleshooting techniques can assist in identifying and resolving the issue:
Unclean or Clogged Air Filter: A dirty or clogged air filter might limit the engine's ability to breathe, which will lower power and revolutions per minute. If the air filter appears to be dusty or blocked, inspect it and replace it.
Fuel System Problems: Issues with the fuel system, such as a defective fuel pump, clogged fuel filter, or damaged fuel injectors, can lead to low RPM. Inspect the gasoline filter for obstructions and swap it out if required. It could be necessary to clean or replace the fuel injectors if they are unclean or not working properly. Furthermore, check the gasoline check the pump to make sure the engine is receiving a sufficient amount of fuel.
Engine Vacuum Leaks: When the engine's air-fuel combination is disturbed, low RPM and subpar performance result. Check for leaks or damage on the vacuum hoses and connectors, and repair any broken parts as necessary.
faulty Mass Airflow Sensor (MAF): The engine control unit (ECU) receives information from the MAF sensor, which monitors the amount of air entering the engine and modifies the air-fuel mixture accordingly. Inaccurate air-fuel ratios brought on by a malfunctioning MAF sensor can lead to low RPM and other performance problems. Use a multimeter or scan tool to test the MAF sensor, and replace it if necessary.
Problem with the Throttle Position Sensor (TPS): TPS keeps an eye on the location of the throttle pedal and transmits this data to the ECU for engine RPM control. Low RPM and other irregular engine performance can be caused by a malfunctioning TPS. If the TPS isn't working properly, test it with a multimeter or scan tool and replace it.
Exhaust System Restrictions: Low RPM and decreased engine performance can result from an exhaust system or catalytic converter that is clogged. Check the exhaust system for any obstructions or limitations, and replace any broken parts as necessary.
Engine Timing Problems: Low RPM can be caused by improper ignition timing or timing belt/chain issues, which can impair engine performance. Verify the timing of the ignition and look for any wear or damage on the timing belt or chain. If necessary, swap either the timing belt or chain and modify the ignition timing.
In case you are incapable of identifying or fixing the low RPM problem with your ISUZU D-MAX 4JK1 engine, it is advised that you get assistance from a certified mechanic or dealership for additional diagnosis and repairs. They can locate the root cause and take appropriate action by using specialist diagnostic tools and knowledge.
Flywheel: The torque specification for the flywheel bolts is typically around 80-85 lb-ft (108-115 Nm). It's crucial to tighten the bolts evenly in a crisscross pattern to ensure proper seating of the flywheel.
Pressure Plate: The torque specification for the pressure plate bolts is usually in the range of 14-20 lb-ft (19-27 Nm). As with the flywheel bolts, it's essential to tighten the pressure plate bolts evenly and in a crisscross pattern to avoid warping or uneven pressure distribution.
It's important to consult the specific repair manual for your vehicle to ensure accurate torque specifications for your particular model and year, as torque values can vary between different engine configurations and manufacturers' recommendations. If you don't have access to the manual, you may want to consider contacting a reputable mechanic or the manufacturer for assistance.
Do you have any warning lights on the dashboard? Have you had it plugged into an OBD2 diagnostic or a scan tool? This will help work out if it is a faulty sensor causing the issue. Is it doing anything else? Rough running, smokey exhaust, hard starting, something else?
How did you 'turn them off'? There are no switches. You can't drive without those two sensors.
You need and auto electrician with a professional grade scan tool computer to diagnose what device (probably ECM) is giving that signal to the engine tachometer.
https://www.google.com/search?q=auto+electrician+near+me
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Have you voltage drop tested and OHM tested the coil with a multimeter, to confirm it's operating within specification?
Here's the ignition wiring diagram:
No added info supplied, Larry. Maybe the following will assist someone else although likely far more general than what you would have provided.
Here are some general steps to guide you through the process:
Preparation:
Safety First: Disconnect the battery to avoid electrical mishaps.
Clear the Area: Remove any items obstructing the headlining area.
Gather Tools: You'll need basic tools like screwdrivers, trim removal tools, and a staple gun.
Remove the Old Headlining:
Remove Visors and Handles: Take off sun visors, handles, and other accessories attached to the headliner.
Remove Trim Panels: Carefully pry off any trim panels covering the edges of the headliner.
Unscrew and Remove: Unscrew any fasteners securing the headliner to the roof.
Lower the Headliner: Slowly lower the headliner, being mindful of any wiring or components.
Prepare the New Headlining:
Inspect and Clean: Inspect the new headliner for any defects. Clean it if necessary.
Transfer Accessories: Transfer visors, handles, and other accessories from the old headliner to the new one.
Installation:
Position the Headliner: Carefully position the new headliner in place.
Secure with Fasteners: Screw the headliner back into place using the original fasteners.
Reattach Trim Panels: Reattach any trim panels you removed earlier.
Reinstall Accessories: Put back the sun visors, handles, and other accessories.
Test Everything: Ensure all components work properly.
Finishing Touches:
Check Alignment: Make sure the headliner is aligned correctly.
Staple the Edges: Use a staple gun to secure the edges of the headliner to the roof.
Trim Excess Material: Trim any excess material around the edges.
Remember to consult your Isuzu Rodeo workshop manual for detailed instructions specific to your vehicle. If you encounter any challenges, seek professional assistance or consult online forums for additional tips.
What exactly are you having a problem with. The HT cables are normally a push on fit. The long connector goes on the spark plug and the other end goes to the coil pack. The important fact is to get the cables in the correct order. This is to make sure the spark plugs fires when it is supposed to.
If your Isuzu Elf 250 equipped with a 4BE1 engine struggles to exceed 80 km per hour following injector and nozzle servicing, consider inspecting the fuel system, air intake, and exhaust for potential issues. Also, scrutinize the transmission and clutch for factors restricting speed. Should the issue persist, seeking the expertise of a mechanic for a comprehensive diagnosis is recommended.