Spark Plug Gap

Reply Subscribe

Thread Tools

Search this Thread

May 5, 2005 | 11:13 AM

JspecSC3

Thread Starter

Lexus Champion

iTrader: (4)

Joined: Jan 2005

Posts: 4,908

Likes: 1

From: N/A

Spark Plug Gap

Ive tried searching to see if anyone had posted something about the gapping for the spark plugs but found nothing. Can anyone help me out? The spark plugs were supposably made for the SC300's 2JZGE motor but when I looked at them they seemed to be kinda spaced out. I put them in anyway and now im getting misfire at idle. I need helpppp

May 5, 2005 | 02:40 PM

got_trd

Lexus Champion

Joined: Feb 2004

Posts: 3,070

Likes: 2

From: Tampa, FL

You didnt measure the gap before you put them in? I have mine gapped at .30, but I have a 1jz. The 2jz-ge gap should be around .44 or something

May 5, 2005 | 05:18 PM

reamemiya

Pole Position

iTrader: (1)

Joined: Jun 2003

Posts: 2,031

Likes: 1

From: California

.44 is factory gap. i have .32, but i'm turbo

May 5, 2005 | 06:45 PM

got_trd

Lexus Champion

Joined: Feb 2004

Posts: 3,070

Likes: 2

From: Tampa, FL

Oh ok... if your boosted, you want to stay around .28-.32. Depending on how much is is missing at high rpm if any. If you are running more than stock boost than you should close the gap a little.

May 5, 2005 | 08:07 PM

JspecSC3

Thread Starter

Lexus Champion

iTrader: (4)

Joined: Jan 2005

Posts: 4,908

Likes: 1

From: N/A

ahhh yes very nice. Now I have to take out everything again and gap those things. Thanks everyone for the help. I will keep the gap for the turbo plugs in mind since my future plans are to boost. Thanks everyone.

I knew I could depend on CL members.

May 6, 2005 | 12:02 AM

reamemiya

Pole Position

iTrader: (1)

Joined: Jun 2003

Posts: 2,031

Likes: 1

From: California

depending on what plugs you got why not just run factory gap as of now. then when you go turbo get new plugs with tighter gaps because you'll have to change them out anyways.

May 6, 2005 | 02:25 PM

JspecSC3

Thread Starter

Lexus Champion

iTrader: (4)

Joined: Jan 2005

Posts: 4,908

Likes: 1

From: N/A

Quote:

Originally Posted by reamemiya

.44 is factory gap. i have .32, but i'm turbo

.44 is too wide of a gap. I corrected my gap spacing them out at .044. The motor was idling smoother than before with just a little bit of misfire because i was gapping them the savage way. But no worries, my MSD upgrade will take care of that problem. For anyone else that wants to know, the correct measurement is .044.

10 Lexus Designs That Have Aged Like Fine Wine

Verdad Gallardo

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Michael S. Palmer

10 Best Lexus Models No One Remembers

Joe Kucinski

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Michael S. Palmer

Top 10 Lexus & Toyotas to Drive Before You Die!

Joe Kucinski

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Joe Kucinski

Lexus LC500 Convertible Auction: A Preview of Rising Values?

Brett Foote

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Michael S. Palmer

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Joe Kucinski

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Brett Foote

Jan 9, 2011 | 10:14 AM

good2go

Lexus Test Driver

iTrader: (6)

Joined: Aug 2008

Posts: 1,574

Likes: 0

From: ca

Quote:

Originally Posted by Devor

Hey guys I just swapped my plugs and wires out but didn't find anything on the gap size til now so I set them at 28mm but I have a 93 stock 5-speed 2JZGE will this be ok? Im trying to pass smog and finally get this project on the road.

No it won't. Why didn't you just set them to stock gap since your are a running stock engine?

Jan 9, 2011 | 11:08 AM

#10

Devor

Pit Crew

iTrader: (1)

Joined: Oct 2010

Posts: 247

Likes: 0

well thats what i was planning on doing. But when I took the old plugs out all the gaps were different sizes like whoever swaped them out last time didnt measure them, and the new ones were all different in sizes to so I just wanted to make sure they were all balanced. I jst wanna be able to pass smog and now I think I will(fingers crossed)

Jan 12, 2011 | 09:17 AM

#11

Devor

Pit Crew

iTrader: (1)

Joined: Oct 2010

Posts: 247

Likes: 0

wait so your telling me I have to go back and gap them to .044 I gaped them at .028 will the car drive the same? or in other word can I pass smog with them gaped at .028?

Jan 12, 2011 | 10:46 AM

#12

stockhatch

Lexus Champion

iTrader: (12)

Joined: May 2009

Posts: 2,544

Likes: 5

From: Raleigh NC

.028 is tight. It may miss at idle with a gap like that, but it should drive ok besides that. I would open the gap. it will run cleaner if you do.

Jan 12, 2011 | 12:28 PM

#13

Devor

Pit Crew

iTrader: (1)

Joined: Oct 2010

Posts: 247

Likes: 0

shoot so your telling me to go back and spread the gap a little more? That job was a pain in the neck to do. Theres no way to pass smog with them gap'd at .028 =/

Jan 12, 2011 | 12:37 PM

#14

stockhatch

Lexus Champion

iTrader: (12)

Joined: May 2009

Posts: 2,544

Likes: 5

From: Raleigh NC

It may pass, but I know my car misses every so often at idle and I have mine gapped down to that range. I have been too busy to open them up again, but I don't have to worry about smog either. My car idle noticeably better with the factory gap.

The only reason mine are gapped so low is because I was troubleshooting an ignition issue that turned out to be a neutral rev limiter. Once I figured out the problem and fixed it, I never went back and opened the gap back up on my plugs.