95 Vienta 3VZ FE misses on acceleration. New plugs fitted

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Test the maf and tps


Volume Air Flow (VAF) Meter
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OPERATION
This component is used on 22R-E, 1FZ-FE, 3VZ-E and 3F-E engines.

This meter measures the amount of air flowing through the intake system. It is used by the ECM to calculate air/fuel mixture.

TESTING
22R-E, 1FZ-FE and 3VZ-E Engines
See Figure 1

Disconnect the wiring from the VAF meter.
Using an ohmmeter, measure the resistance between terminals E2 and VS. Resistance should be as follows:
1FZ-FE and 3VZ-E-200-600 ohms

Fig. 1: Attach the ohmmeter to terminals E2 and VS

If the test is not within specification, replace the unit.



Throttle Position Sensor
OPERATION
Throttle position sensors are usually mounted on the side of the throttle body. The sensor detects the throttle valve opening angle. The voltage of terminal VTA increases in proportion of the opening angle of the throttle valve. The ECM judges the driving conditions from the input signals of the terminals, and uses them as one of the conditions for deciding the air/fuel ratio correction, power increases and fuel cut-off control.
TESTING 3VZ-E and 1FZ-FE Engines
Confirm that the throttle valve is fully closed.Connect an ohmmeter to terminals IDL and E2. E2 is the bottom terminal, while terminal IDL is positioned directly above it.
Insert a 0.020 in. (0.50mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should be present.Insert a 0.031 in. (0.80mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should not be present.

Could be maf or tps. Here are some test procedures:

Volume Air Flow (VAF) MeterOPERATION This component is used on 22R-E, 1FZ-FE, 3VZ-E and 3F-E engines.
This meter measures the amount of air flowing through the intake system. It is used by the ECM to calculate air/fuel mixture.
TESTING 22R-E, 1FZ-FE and 3VZ-E Engines
See Figure 1
Disconnect the wiring from the VAF meter.Using an ohmmeter, measure the resistance between terminals E2 and VS. Resistance should be as follows: 3VZ-E-200-600 ohms


Fig. 1: Attach the ohmmeter to terminals E2 and VS

If the test is not within specification, replace the unit.



Throttle position sensors are usually mounted on the side of the throttle body. The sensor detects the throttle valve opening angle. The voltage of terminal VTA increases in proportion of the opening angle of the throttle valve. The ECM judges the driving conditions from the input signals of the terminals, and uses them as one of the conditions for deciding the air/fuel ratio correction, power increases and fuel cut-off control. 3VZ-E and 1FZ-FE Engines
Confirm that the throttle valve is fully closed.Connect an ohmmeter to terminals IDL and E2. E2 is the bottom terminal, while terminal IDL is positioned directly above it.
Insert a 0.020 in. (0.50mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should be present.Insert a 0.031 in. (0.80mm) thick feeler gauge between the throttle stop screw and lever. Check for continuity between terminals IDL and E2 of the sensor. Continuity should not be present.

I have 3vz-fe and 3vz-f
It shows a 3.0L v6--95 Toyota 4-runner.
I don't see 3v2? Is this vehicle sold in the US? If not, I wouldn't have those specs, sorry.

Got a check engine light? Get the codes read to find out if the misfires are on all cylinders or just 1. Could be ign coil, bad crank or cam sensor, or a valve issue

Hello! If the engine in your vehicle is the 3VZ-FE...The firing order is 1-2-3-4-5-6...Distributor rotation is Counter Clockwise...



If the engine is a 2JZ-GE...The firing order is 1-5-3-6-2-4...Distributor rotation is Counter clockwise


Guru...........saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

REMOVAL & INSTALLATION (4 Cyl. eng.) CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.
2. On the 1MZ-FE engine, remove the air cleaner cap assembly. Be sure to label all wiring disconnected.
3. Disconnect the water temperature switch harness from the water inlet housing (except 5S-FE engines).
4. Remove the oil filter on 5S-FE engines. On the 1MZ-FE engines, remove the heater hose covering the housing.
5. Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
6. Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
7. Remove the thermostat and rubber O-ring gasket from the water inlet housing. To install:
   
8. Make sure all the gasket surfaces are clean. Clean the inside of the inlet housing and the radiator hose connection with a rag.
9. Install the new rubber O-ring gasket onto the thermostat. On 2SE and 3S-FE engines, align the jiggle valve of the thermostat with the protrusion on the water inlet housing. On 5S-FE engines, align the jiggle valve with the upper side of the stud bolt. On 2VZ-FE and 3VZ-FE engines, align the jiggle valve with the stud bolt. Insert the thermostat into the housing. Fig. 1: Remove the thermostat housing from the engine with the coolant temperature sensor - 1MZ-FE engine
   Fig. 2: Removing the thermostat from the engine - 1MZ-FE engine
   Fig. 3: Always discard the old O-ring from the thermostat, if reusing the old component
   Fig. 4: Always replace the thermostat with the correct temperature specifications
   Fig. 5: Line-up the jiggle valve with the protrusion on the housing - 5S-FE engine
   
   
10. Position the water inlet housing with the thermostat over the studs on the water pump and install the two nuts. Tighten the two nuts to 78 inch lbs. (9 Nm) on 4 cyl. engines, 2VZ-FE and 3VZ-FE; 14 ft. lbs. (20 Nm) and 69 inch lbs. (8 Nm) on 1MZ-FE engines. Fig. 6: Thermostat installation - 2VZ-FE and 3VZ-FE engines
    NOTE: Don't forget to install a new O-ring onto the water inlet pipe. Apply soapy water to the O-ring prior to installation.
    
11. Connect the lower radiator hose to the inlet housing and install the hose clamp. On the 3VZ-FE, tighten the bolt holding the water inlet hose to the alternator belt adjusting bar to 14 ft. lbs. (20 Nm). On the 1MZ-FE engine, tighten the bolt retaining the water inlet pipe to the cylinder head to 14 ft. lbs. (20 Nm).
12. Attach the water temperature switch connector.
13. On the 1MZ-FE engines, install the heater hose removed.
14. Install the oil filter and check the oil level if removed. Install the air cleaner cap assembly on the 1MZ-FE engines.
15. Fill the cooling system with a good brand of ethylene glycol based coolant.
16. Start the engine and inspect for leaks.

Hi,

That engine will leak oil from

- cam cover gaskets (rear one drips on the exhaust)
- camshaft end seals
- distributor shaft o-ring (appears on top of transaxle housing)
- oil filter bracket to block o-ring seal (drips on front bank exhaust)
- crankshaft nose oil seal (have done with timing belt change)
- rear main seal (expensive, leave it be)

Make sure the suction tube in the overflow hasn't fallen off or removed !