# I drive a 95 toyota 4 runner.I would like to know the right way to check my sparkplug wires if working p roper.

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You can fabricate a tester from a 6 inch long mongol pencil. Sharpen one end and drill a 1/8" hole in the middle. Now remove the sparkplug wire from each sparkplug and insert the pencil onto the sparkplug wire with the dsharpened end connected or touching the ground or any metal part of the engine. Start your engine and you should see sparks jumping on the drilled hole on the pencil which indicates that your spark plug wire is okay.

Posted on Nov 09, 2014

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To check if the wires are allowing the plugs to spark! Remove a plug attach to wire and turn engine to see if plug sparks! If spark then lead is ok! Do in turn for each lead!

Posted on Nov 09, 2014

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Remove spark plug and reattach spark lead, with the ignition on rotate the engine with a spanner via the bolt on the bottom pully making sure that the plug is earthed against the engine, if after one complete rotation you should see the spark, making sure you do it slowly as the spark is hard to see, repeat the same with the other three leads.

Posted on Nov 09, 2014

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Start your engine as usual, open the bonnet, then pull out each H T cable and return before pulling another. Please notice the engine vibration. If the sound of the engine changes, that means the cable is ok, if no change, neither engine vibration not engen sound change. That H T cable is a suspect. H T cable is a cable from the distributer to the plugs.

Posted on Nov 09, 2014

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Posted on Jan 02, 2017

SOURCE: 2003 Toyota 4 runner

Hi robrtsn,
As you forgot to say what the engine is in your 4-Runner....I'll give you the rule of thumb....if you have a timing chain in your engine, you'll need to check it only if it becomes noisy....If you have a timing belt, the manufactures recommend that it's replaced every one hundred thousand kilometers.....thats about sixty five thousand miles.... I believe that the later vehicles...(those with the electronic odometer fitted) have been extended to one hundred and fifty thousand, but to be on the safe side, I'd replace at one hundred thousand, especially with the number of sub standard parts that are available on the market these days....

Hope that's a help

Best regards Johngee10

Posted on Sep 01, 2008

SOURCE: check engine light on

This is a code that is indicating you have a problem with the "bank 1, O2 sensor 1" heater circuit. Bank one is the side of the engine that has cylinder #1, and sensor #1 is the O2 sensor on that side that is before the catalytic converter. This code sets when the computer senses that it either takes too much or too little current to drive the heater inside the O2 sensor. Typically, most shops would simply put a new O2 sensor in this location as it is ten years old and there is a good chance that the O2 sensor has burnt out However, there is a possibility that the driver circuitry has a problem as well.

I would replace the sensor, I believe it is the one on the passenger side between the engine and the cat. After that, you will have to drive it a bit for the code to cancel, or you could have it reset with a scan tool.

Posted on Mar 23, 2009

Posted on Apr 04, 2009

You need to reset the light with a scan tool, the same one you used to read the code in the first place.

Posted on Apr 13, 2009

it should be in the underhood fusebox on the right.

Posted on Jun 11, 2009

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