Shaking with misfire

  • 3.4L
  • 6 CYL
  • 4WD
  • 320,000 MILES
Driving down the road and the car was shaking pretty vigorously. I started to do some looking around under the hood and checked the vacuum lines. Just was thinking is was a fuel injection problem on number 6. If you have any information on some good ways to make sure it’s this or it could be something else. I could try to see if the ohms are reading good I think it should be somewhere around 16. Let me know if you have any suggestions on what this could be.
Do you
have the same problem?
Sunday, February 7th, 2021 AT 12:29 PM

1 Reply


It could be a couple things. Here are the directions for testing the injector. The attached pictures correlate with the directions.


1997 Toyota Truck 4 Runner Limited 4WD V6-3.4L (5VZ-FE)
Injection Inspection
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Injector Testing and Inspection Component Tests and General Diagnostics Injection Inspection

pic 1

1. Inspect injector resistance.
Using an ohmmeter, measure the resistance between the terminals.

Resistance: At 20°C (68°F): Approx. 13.8 ohm

If the resistance is not as specified, replace the injector.
2. Inspect injector injection.

CAUTION: Keep injector clear of sparks during the test.

(a)Disconnect the fuel inlet pipe from the fuel tube.

Pic 2

(b)Connect SST (attachment and hose) to the fuel tube. SST 09268-41046 (09268-52011)
(c)Connect the fuel return hose, SST (union) and SST (hose) to the fuel pressure regulator. SST 0926841046 (0926841091)
(d)Install the 0-ring to the injector.

Pic 3

(e)Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp). SST 0926841046
(f)Put the injector into the graduated cylinder.

HINT: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.

(g)Connect the TOYOTA hand-held tester to the DLC3.

Pic 4

(h)Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times. SST 09842-30070

Volume: 55 - 70 cm. Cube (3.3-4.3 cu. In.) Per 15 sec.

Difference between each injector: 6 cm. Cube (0.4 cu. In.) Or less

If the ignition volume is not as specified, replace the injector.

Pic 5

3. Inspect leakage.
(a)In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector. SST 09842-30070

Fuel drop: 1 drop or less per minute

(b)Turn the ignition switch to LOCK.
(c)Disconnect the negative (-) terminal cable from the battery.
(d)Remove SST
SST 0926841045
(e)Disconnect the TOYOTA hand-held tester from the DLC3.


Let me know what you find or if you have other questions. Also, if you have a live data scan tool, let me know what the short term fuel trims are.

Take care and God Bless,

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Sunday, February 7th, 2021 AT 7:43 PM

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