So my 09 lexus es350 has a little over 110,000 miles and i know i should have changed my spark plugs already, but i was wondering if there are any recommendations on certain spark plugs. Something with a little more power? I love how my car runs but there is always that need for more.

 

Put Denso FK20HR11.

 

Here is a youtube video on a 2007 Camry V6 (same engine as Lexus ES350).

It's entertaining and shows it is not an easy DIY job


Here are step by step instructions with pictures in the toyotanation Highlander forum:


http://www.toyotanation.com/forum/12...placement.html

Note: I have seen multiple pictures of replaced spark plugs in this engine and they are easily good for 120,000 miles and beyond.

 

Off hand observation: before I had my Lexus, the plugs, antifreeze, radiator, etc. needed
much more maintenance. What's the deal? I can remember my radiators developing rust
and leaks, I have a garage Queen, (read: low mileage), but the way you guys talk these
last a long time!

 

Recommended OEM plug replacement is 120K; so, you are on schedule at 110K.

Stock plugs are iridum type - Denso, if I recall correctly.

I replaced at 120K with NGK LFR6AIX-11 (box 6619). Be prepared to clean out the Map sensor since you'll be getting intimate with the air intake assembly when you go to replace the three rear plugs.

 

MAP sensor?

 

My 2009 lexus es350 has 122k and spark plugs have not been replaced yet, but they are all highway miles; Car runs beautiful. Should I wait like until 140k-150k (i might upgrade my car in next 6-12 months to the newer body style)

 

Mass Airflow Sensor / Manifold absolute pressure

The end result is the ECU calculates the mass of air flowing into the engine for fuel/air ratio purposes.

They sell special MAF/MAP sensor cleaner

 

Thanks for the link to the guide with photos. I saved it since with my luck normally the pictures would stop being hosted when I finally find the resource.

The video doesn't look that bad, just gotta commit some time to it.

 

MAF sensor has nothing to do with MAP.

2GR FE does not have MAP.

 

Feel free to expand on your criticism of my post... I am aware they are two 'different' things. That being said, they perform the same function unless I am missing something. They both determine the air part of the air/fuel ratio for the ECU. MAF directly measures, MAP provides an input to a calculation.

 

Thanks for the great detailed pics and info on the nightmare rear three plugs not for me hell no im taking mine to the shop

 

Wait else should be changed while doing the spark plugs ... anyone? Gaskets, wires, ...? Just looking to save some money on doing preventative maintenance, while I get it serviced at an independent shop.

Thanks in advance

 

If more than 150K miles, I would consider replacing the plenum gaskets (denso 037-4886) and ignition coils 1, 3, & 5 - the ones facing the firewall. But I would avoid getting the cheap Chinese made coils. Of the two I bought one went bad within a year. A good Japanese aftermarket vendor is Yec Flamma, pt# IGC112F - I paid $19, but now see them up to $40. I had paid $20 for the Chinese coils. An AutoZone coil I bought, nearing 100K, is still going well; I think I paid $70 but has a lifetime warranty. The only other thing I would do is to clean the inside of the throttle body, which can be done after the spark plug installation.

 

If they are removing the surge tank, they should replace the gaskets, I think I paid just under $30 at the dealer for the set. Other than that, perhaps just the PCV, it is on the top of the bank 2. Re: coils suggestion, I am replacing them as they fail. My ES is at over 300K now, and I've only replaced 2 so far. I am from the "if it ain't broke - don't fix" camp