12-16-14, 12:29 PM
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- Lexus IS GS: How to Replace Spark Plugs
Step by step instructions for do-it-yourself repairs
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Spark Plug Change for GS300
04-05-15, 05:51 PM
#137
Intermediate
Thread Starter
Hey guys, I am going to do this job again in the next few days. This time I will film it and post it to YouTube. It's been a while since I have been active here, can anyone tell me how to attach a video? I am also going to do a post on how to replace the power steering pump. Let me know if you guys are interested.
04-21-15, 08:47 AM
#138
Hey guys, I am going to do this job again in the next few days. This time I will film it and post it to YouTube. It's been a while since I have been active here, can anyone tell me how to attach a video? I am also going to do a post on how to replace the power steering pump. Let me know if you guys are interested.
07-27-15, 10:06 AM
#139
Pit Crew
Do Not Do What I Did!
So, This weekend I decided to replace the plugs and wires on my 2JZ-GE engine. I had finished everything up except replacing the snorkel between the air filter box and the throttle body. I figured the car should run fine, and was not concerned the air entering the throttle body was not "filtered".
Tried to start the car a couple times and it would start only to die after a few seconds, by what appeared to be lack of fuel.
After looking a little closer it became obvious that the Mass Airflow Meter was attached to the Air Filter Box and without the snorkel attached no air flow was being sensed by the MAF, and thus the cars computer was shutting it down since it did not think the engine was getting any air!
Attached the snorkel and car fired right up.
Tried to start the car a couple times and it would start only to die after a few seconds, by what appeared to be lack of fuel.
After looking a little closer it became obvious that the Mass Airflow Meter was attached to the Air Filter Box and without the snorkel attached no air flow was being sensed by the MAF, and thus the cars computer was shutting it down since it did not think the engine was getting any air!
Attached the snorkel and car fired right up.
11-05-15, 01:34 AM
#140
Driver School Candidate
Join Date: Sep 2015
Location: Va
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Yes, I can. I put them in a little while ago and then I went up with the club to the Dragon "Tail of the Dragon 05". I'm very pleased with the plugs. I did see an increase in gas mileage (9 to 13+) and I can say I did see the difference in a quicker acceleration. I was able to keep up (closely) with some worked IS300's on the Dragon with short bursts of acceleration (you know given the weight difference, plus I'm worked too). It does rev up quicker, I give it a big up 
Where you get yours? Plug model number? The site posted a few back isn't exactly information rich for the torque masters
11-19-15, 07:17 AM
#141
nice writeup. makes me appreciate my gte engine alot more just take the cover off and take plugs out in 10 mins... every 2j should have just been turbo from the start with all this extra bs for the gt engine makes it such a pia
Last edited by dreamcar88; 11-19-15 at 07:30 AM.
01-03-18, 10:26 AM
#145
Driver School Candidate
Hey guys, I am going to do this job again in the next few days. This time I will film it and post it to YouTube. It's been a while since I have been active here, can anyone tell me how to attach a video? I am also going to do a post on how to replace the power steering pump. Let me know if you guys are interested.
NGK Plugs (what I use):
DENSO Plugs (have not used):
05-19-18, 08:43 AM
#146
Driver School Candidate
Join Date: May 2018
Location: East Sussex
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1st generation lexus gs 300
I tried doing my plugs yesterday but gave up after watching videos on YouTube I did nt realise the other nut underneath the throttle body so I put it all back together it only done 52.000 miles when I bought it last year now got 61.000 done auxiliary belt a month ago I do services every 6 months
10-29-18, 05:38 AM
#148
Advanced
I just posted this but figured I would post it here as well. I hate to bring up an over saturated topic, but I found this to change a lot of things and figured I would share. For years I have been using NGK Iridium IX Spark Plugs (BKR5EIX-11) in my 1999 GS300, 196,XXX miles. However, about 2 months ago, I realized that these were the WRONG plugs for the GS300. I was doing work under the hood and realized a sticker I have never looked at (pictured below) and it got my attention. Checked the owners manual, only to find that I have been using the wrong spark plugs for the last 12 years or so?!?! The owners manual calls for platinum twin ground electrodes, or NGK Laser Platinum (BKR5EKPB-11). Not only was I using iridium instead of platinum, but I was also using single ground instead of twin ground. It clearly states to ONLY using platinum plugs for the GS300 and ONLY iridium plugs for the GS400. I mean, it even has an "X" through the single ground. The twin ground platinum plugs are pricy, $60 for 6 NGK ($1 each), or $45 for 6 DENSO. There are countless forums suggesting the using of single ground iridium plugs for the GS300, so hopefully this can help some people out. Heck, even O'Reilly's doesn't know that you need twin ground, they offer you single ground. I know it is pricey but my MPG went from 16 combined city/highway, to 24 combined city/highway after the switch, highway is at 75-80 mph 90% of the time. Not only this, but the new plugs gave me more HP/TQ, way more punchy, fixed a stutering problem I had around 35-45 mph, and the other plugs caused my alternator to fail prematurely. All things that I had written off because of the age of my car. After the experience with the new plugs, and what the owners manual had to say, safe to say I won't be using anything else.
NGK Plugs (what I use): https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
DENSO Plugs (have not used): https://www.amazon.com/dp/B00AESB9ZS...S8YPCYJW&psc=0
NGK Plugs (what I use): https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
DENSO Plugs (have not used): https://www.amazon.com/dp/B00AESB9ZS...S8YPCYJW&psc=0
Sorry to hear that it took you so long to realize this. Hopefully, you will see a difference, but even if you don’t just know that now you’re using the correct part now.
11-19-18, 01:04 PM
#150