Checks, in order
- Fuel pump primeTurn the key to on and listen at the tank for the pump to run for a couple of seconds. No sound means check the fuse and the circuit opening relay, then the pump.easy $ · under about $50
- Spark testUse a spark tester on a plug wire. No spark on any cylinder points to the igniter, ignition coil, distributor pickup or crank sensor.medium $ · under about $50
- Fuel pressureConnect a gauge to the fuel rail test port. Low pressure with a running pump points to a clogged filter or a weak pump.medium $$ · about $50 to $500
- Distributor and wiresPull the cap and look for moisture, carbon tracking or a cracked rotor. Old plug wires can leak spark and cause a no start in damp weather.easy $ · under about $50
- Read codesA crank sensor or fuel related code narrows it down quickly. Use a scan tool or jump the diagnostic connector to read flash codes.easy $ · under about $50
Applies to: 1996 to 2002 4Runner with the 2.7L 3RZ-FE four-cylinder and the 3.4L 5VZ-FE V6, 2WD and 4WD, manual and automatic. Where a check only applies to one engine it says so.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
| Fuel pressure test gauge kit | Confirming the pump is delivering pressure | Shop on Amazon |
| Inline spark tester | Confirming there is spark at the plugs | Shop on Amazon |
The same problem on other Toyotas
- 3rd Gen Tacoma (2016–2023): Engine cranks but won't start or dies right after starting
- 1st Gen Tacoma (1995.5–2004): Cranks fine but won't start or dies after starting
- 5th Gen 4Runner (2010–2024): Engine cranks but won't start
- FJ Cruiser (2007–2014): Engine cranks normally but won't start
- 100 Series Land Cruiser / Lexus LX 470 (1998–2007): Engine cranks normally but won't start
- 80 Series Land Cruiser (1991–1997): Cranks fine but won't fire
Other fuel & ignition problems on the 3rd Gen 4Runner
More 3rd Gen 4Runner problems
- Clunk, knock or loose feel in the front end over bumps (Steering & Suspension)
- Shimmy, vibration or steering wander at highway speed (Steering & Suspension)
- Frame rust, rotten rocker panels or rusty underbody (Frame & Body)
- Engine overheating or temperature gauge climbing (Cooling)
- Pink or milky transmission fluid, or coolant in the transmission (Transmission)
- 5VZ-FE timing belt service: when is it due and how do I tell? (Engine)
All 16 3rd Gen 4Runner symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.