spark plugs

Remove the coil electrical connector, then pull coil straight up. The coils would have a bolt holding them down.

here is a guide to help


https://www.2carpros.com/articles/how-to-change-spark-plugs

Recommended Spark Plugs

DENSO SK16R11
NGK IFR5A11

Gap .................... 1.1 mm (0.043 in)

Torque .................... 18 Nm (13 lb-ft)

Last time I purchased and installed my spark plugs was about 63000 miles ago.
How often should I change these spark plugs?
And if I buy those 100000 mile plugs will they last for 100000 miles?
I cummute about 170 miles a day 5 days a week.
Thank you,
Tim

Hi there,

yes it's about time to change those plugs, and don't forget the air & fuel filters as well. Long life Iridium spark plugs will go the distance they are a good investment, i try and use them in lots of customers cars my self.

Mark (mhpautos) :D

2001 toyota corolla 167k miles

01' corolla had engine light on (fuel lean code). stayed on for a few months. car starts with no problem, but stalls out or misses intermittently. MAF was replaced as well as the O2 sensor a few months back. took car to dealer last week to finally get the car fixed....i thought... they diagnosed for 3 hours and ended up replacing the spark plugs and the fuel injectors (wasn't cheap). the day after i picked it up the car last week, the car did the same stalling or missing and today the engine light popped back on.

question:

am i on the hook for any further diagnosis cost or any further parts cost? i plan to drop it off to be fixed "right" on their dime! thoughts on how to handle this?

Rescan the computer

fuel lean code).

A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

I own a 2001 Corolla S and changed the spark plugs recently. However, as I was doing this myself, I had removed all 4 of the ignition coils out in order to change the spark plugs. I didn't make any mark on them, so I didn't remember which coil should go into which well... The coils all look identical, Toyota part number 90080-19015. However, on the tip of the tubes, they were number N 6.29, N 6.32, N 6.34, and N 6.7. I am afraid to put them into wrong wells/cylinders and cause any damages to spark plugs and engine. Please tell me which coil goes in which wells. Thanks.

Hi daddygal2007, and TY for the donation

Dunno about them no.s but here's another way of doing it. They are 4-wires to a coil/ignitor connector all the connectors has 3 the same color wires except one-this 4th color wire identifies what cylinder it goes to refer to diagram below

3-wires are Blk/White, Blue/Yellow, Brown

Cyl no.1 should have the Red and Blue

Cyl no.2 " " " Yellow and Green

Cyl no.3 " " " Gray

Cyl no.4 " " " White

Other Category problem
2001 Toyota Corolla 4 cyl Wheel Drive Type unknown Automatic 75000 miles
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if you have a misfireing of spark plugs do you have to replace all of them?

Hi there,

If you have a faulty spark plug, you do not have to replace them all, but it is good practice to renew them as a set, as if one has failed, the others may also be suspect as well.

Mark (mhpautos)

2001 Toyota Corolla 4 cyl Automatic 140000 miles

I have a 2001 Toyota corolla with codes P1310, P0300, and P0171. Ive replaced the ignition coils, spark plugs, MAF sensor and checked for any leaks (no leaks). Spark plug on cylinder 3 has oil deposits. Any help will be appreciated.

The P1310 is specific to Toyota in the OBDII world.

This could be a crank/cam sensor, connection to/or PCM. Could also be as simple as a cocked spark plug washer.

Best advice is to take to Toyota or trusted garage and have it scanned to isolate problem.

If you have replaced coils and MAF, you have a lot of money in it.

It is also possible (not likely) a valve spring has collapsed.