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Spark Plug Change for GS300

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Old 04-29-05, 11:11 PM   #31
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Originally Posted by Percy
Is yours a GS4 or GS3? Mine came with the Denso Iridiums out of the box. (GS4)

Percy
mine's a GS430....
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Old 05-02-05, 11:40 PM   #32
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You'll do fine with the extremespark plugs. There's a GS430 in the family...works great.

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Old 08-10-05, 12:11 AM   #33
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so can anyone vouche for torquemasters in a gs300... i wonder if they made plugs with proper gap for gs300
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Old 08-10-05, 05:29 PM   #34
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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
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Old 08-10-05, 06:22 PM   #35
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I have always used the stock Iridium plug in both my GS4, and haven't had any problems until now.\

My first GS4 was a beast, and ran good all the time. I changed the stick plugs at 90,000 miles, and it ran the same.

I bought this GS4 at 59,000 miles, and learned that the 60,000 mile service had already been done. Further investigating revealed that the plugs were changed at 60,000 miles, which was something that is not normally done. The car should run BETTER not worse since it has newer plugs, but it certainly doesn't.

When I brought it to California and had the first smog check, everything was fine except for higher than normal NOX, but it was not a big enough problem to turn on the check engine light, so Lexus would not look at it.

The car has never run AS GOOD as the other one, and I haven't been able to figure out why. Idle is good but the response is a little delayed. I reset the ECU many times, to no avail. I have a slight flutter while holding the throttle steady with no load. Acceleration is not as good as I think it should be.

I believe I will try a set of the TORQUEMASTERS, although the first reports about this plug didn't give me a good feeling. Now all I hear is praise for the plug now.

I think that 100 dollars is a small price to pay if these plugs will help it run better.

Has NO ONE seen anything negative with using these plugs lately? As long as they don't do any damage, I can always put the other plugs back in if I don't like them. Would a misfiring or weak coil show up as a check engine light?

Is there anywhere other than the dealership that can do a SCOPE of this engine, and give individual readings from each cylinder?

Thanks

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Old 09-18-05, 08:40 AM   #36
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Thanks for the write up, Red.

Few questions:

I have 2000 gs300, and there is a bolted down cover over the engine, which needs to be taken off before any work is done. Do you not have one on yours, or did you not mention it because it is obvious?

Also, the manual suggests iridum plugs only for GS400, but platinum for GS300, so, is going with iridium for GS300 safe, as far as engine durability, since I value it more than performance?

I don't have any tools whatsoever, so, what exactly will I need to buy?

Thanks
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Old 01-06-06, 05:10 PM   #37
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OK so let's get back to the basic question. FOR THE GS300 (not 400's guys), how are the Torquemasters as opposed to the OEM Denso/NGK's? I have 80k on my car, and I've had it since it had 30k, I haven't changed them (plugs) in that time. I have no problems with start-up or anything, but if what you guys say is true, I wouldn't mind a little boost or quicker response if the Torquemasters can provide that. Also, are there any downsides to changing from OEM sparks to aftermarkets? I don't know too much about these things, so what would be the best way to go in my situation???
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Old 01-06-06, 05:11 PM   #38
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Oh yeah, mines is a 1998 300
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Old 01-06-06, 05:20 PM   #39
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Give them a try. GS3 is a 6 banger so you'll be out 66 dollars plus shipping. Or it could be the best 66 dollars that you've invested into the car. No problems with the plugs that I know of. I've had these installed on many other cars (subaru, G35x, etc) and they've worked out GREAT.

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Old 01-06-06, 08:02 PM   #40
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Ditto man, go ahead and put them puppies in. My GS3 has, I think about 135K on the motor and I have NO complaints. I can honestly say that they are what is keeping me in the runnings when I go on my driving excursions (mountain runs) with smaller, higher compression cars.

Very impressive, no regrets.
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Old 01-07-06, 12:56 AM   #41
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Kaiser graciously helped me put in some torquemasters on my 98 gs3 with 100k on the odo. It definitely pulls harder. Go for it.
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Old 01-07-06, 11:27 AM   #42
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kewlllll, and so it is done. . thanks for the quick responce fellas, I appreciate that!
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Old 01-24-06, 12:32 AM   #43
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guess its been awhile since i've had my plugs in... the work on the 300 thats for sure haha

cant really tell if its changed much i still drive crazy...

btw redjeepers pix are a big vague so use my TB coolant bypass on GS300 thread to view on how to move/remove the TB to get down into the plugs... or heck go ahead and do my mod while ur doing hte plugs
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Old 01-24-06, 04:17 AM   #44
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Anybody got TorqueMasters in their GS 400 or 430??

If you did it yourself...Is the install a tough one??
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Old 01-24-06, 10:07 AM   #45
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GS400, had them for a while. Easy install. GS300 is a bit more challenging though.

Wouldn't go back to the iridium CRAP if they paid me to. Even if they did, I'd still switch them out for the torquemaster/extremesparks.

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Old 01-24-06, 10:07 AM
 
 
 
 
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