Too big of a Spark Plug Gap? - Corvette Forum

Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Log In 
Register FAQ Search Today's Posts Mark Forums Read Vendor Directory
Search

C4 Tech/Performance
L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Too big of a Spark Plug Gap?

Reply
 
 
 
Thread Tools Search this Thread
Old 11-29-2001, 09:29 PM   #1
TIMSPEED
CF Senior Member
 
TIMSPEED's Avatar
 
Member Since: Mar 2001
Posts: 9,464
Location: Modesto CA
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to TIMSPEED Send a message via Yahoo to TIMSPEED
Default Too big of a Spark Plug Gap?

What would too big of a spark plug gap do? I cut back the electrodes on my car, and now when I drive it, it surges at idle, and it seems to stumble under acceleration, and it makes a weird low booming sound as the rpm's go up. (It seems to follow the rpm's, in how many times per minute it happens)
TIMSPEED is offline   Reply With Quote
Old 11-29-2001, 09:46 PM   #2
jackdaroofer
CF Senior Member
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Support Corvetteforum!
 
jackdaroofer's Avatar
 
Member Since: Dec 1999
Posts: 11,169
Location: Almost all Skyline Cruises Vettes at Waterside 1-5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Too big of a Spark Plug Gap? (TIMSPEED)

Too much of a gap could create a short or insufficient burn

what gap do you think you have?

A wider than suggested gap can provide a little more power with a sacrifice in fuel economy

Cutting the electrode has been tried many times since the early fifties both by us amateurs and the spark plug companies, maybe it works, maybe it doesn't

Not a criticism of those that are happy with cut plugs!

:seeya
jackdaroofer is offline   Reply With Quote
Old 11-29-2001, 09:55 PM   #3
Scott LeMuke
CF Member
 
Scott LeMuke's Avatar
 
Member Since: Jul 2001
Posts: 72
Location: Kalamazoo, MI, USA
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Too big of a Spark Plug Gap? (TIMSPEED)

I had exactly the same problem. In my case, it was NOT the gap size.

It was a hairline crack in one of the new plugs.

I must have accidently put some pressure on the ceramic insulator when installing the plug.

Luckily, the first plug I took out to inspect was the cracked plug.

I reinstalled a new plug and she ran like a champ.


PS: Another thing I was checking for when I was trying to solve the problem was whether or not I had tightly reinstalled all of the plug boots on the plugs and whether or not I had accidently cracked a plug wire.


[Modified by Scott LeMuke, 8:58 PM 11/29/2001]
Scott LeMuke is offline   Reply With Quote
Old 11-29-2001, 09:56 PM   #4
65Z01
CF Senior Member
Cruise-In II Veteran
 
65Z01's Avatar
 
Member Since: Dec 2000
Posts: 69,066
Location: SE NY
Thanks: 0
Thanked 7 Times in 6 Posts
Send a message via AIM to 65Z01
Default Re: Too big of a Spark Plug Gap? (TIMSPEED)

With that ignition it should be able to handle .045" gap. Verify that all plug wires are solidly on and check any vacuum hoses that might have been touched.
65Z01 is offline   Reply With Quote
Old 11-29-2001, 11:00 PM   #5
TIMSPEED
CF Senior Member
 
TIMSPEED's Avatar
 
Member Since: Mar 2001
Posts: 9,464
Location: Modesto CA
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to TIMSPEED Send a message via Yahoo to TIMSPEED
Default Re: Too big of a Spark Plug Gap? (65Z01)

I'm about 90% sure I cracked a plug actually. When I was putting on the #2 plug, I heard a loud "CRACK". So I took off the ratchet and felt the plug to see if I busted it. I didn't feel anything, but if that's what happened in your case, I'm about 90% sure that's what happened here. I have a messed up wire also though. It got a little "cracked" I guess is the word. It looks like it was cut into on one side a little. (It was burned though) I wrapped that area in electrical tape, so hopefully that will work. I'm gonna go check the plug right now. Thanks for the input!
TIMSPEED is offline   Reply With Quote
Old 11-29-2001, 11:22 PM   #6
scorp508
CF Senior Member
 
scorp508's Avatar
 
Member Since: Mar 2000
Posts: 83,055
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Re-check your gap while you are at it. Did you put dielectric grease in the boots when hooking up the wires? I hope you used antiseeze also on them. :)
scorp508 is offline   Reply With Quote
Old 11-30-2001, 11:59 AM   #7
black bart
CF Senior Member
 
black bart's Avatar
 
Member Since: Jul 2001
Posts: 1,897
Location: La Fontaine Indiana
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: (scorp508)

Replace the broken plug and also replace the bad wire you can't expect your car to run good with spark plug wires that are taped if it looks so bad that you thought it needed taped then it should be replaced.
black bart is offline   Reply With Quote
Old 11-30-2001, 12:09 PM   #8
BobMachus
CF Senior Member
 
BobMachus's Avatar
 
Member Since: Jun 2001
Posts: 2,513
Location: Fort Collins CO
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: (black bart)

Quote:
...replace the bad wire you can't expect your car to run good with spark plug wires that are taped if it looks so bad that you thought it needed taped then it should be replaced.
:yesnod: :yesnod:

Plugs wires need to contain huge amounts of voltage, that is why the insulator is so thick. Electrical tape cannot do this job. As Scorp said, if it is bad enough to be taped, it is really time to replace not repair it.
BobMachus is offline   Reply With Quote
Old 11-30-2001, 12:59 PM   #9
Vetterin
CF Senior Member
 
Vetterin's Avatar
 
Member Since: Apr 2000
Posts: 1,879
Location: Lockport, IL Let's get em ALL home soon!
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Too big of a Spark Plug Gap? (TIMSPEED)

I have a messed up wire also though. It got a little "cracked" I guess is the word. It looks like it was cut into on one side a little. (It was burned though) I wrapped that area in electrical tape,

Don't even waste your time. Replace ALL your plugs and wires ASAP. Just gap the plugs to spec and see how it runs.
Vetterin is offline   Reply With Quote
Old 11-30-2001, 02:18 PM   #10
Camvette
CF Senior Member
 
Camvette's Avatar
 
Member Since: Oct 2000
Posts: 206
Location: Nashville, Tn. 37211 TN.
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Too big of a Spark Plug Gap? (Vetterin)

Timspeed, You had several posts that your car would'nt start. What was the problem? I take it by this post, you have the car running.
:confused: :confused:
Camvette is offline   Reply With Quote
Old 11-30-2001, 03:32 PM   #11
TIMSPEED
CF Senior Member
 
TIMSPEED's Avatar
 
Member Since: Mar 2001
Posts: 9,464
Location: Modesto CA
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to TIMSPEED Send a message via Yahoo to TIMSPEED
Default Re: Too big of a Spark Plug Gap? (Camvette)

I guess it was just the plugs were ALL fouled or something. I put in new plugs, and (Thanks TO LeMuke) I replaced that one that DID crack, and my car is running AWESOME! It even chirped the tires when shifting 1-2 at about throttle!
TIMSPEED is offline   Reply With Quote
Old 12-01-2001, 08:28 AM   #12
Scott LeMuke
CF Member
 
Scott LeMuke's Avatar
 
Member Since: Jul 2001
Posts: 72
Location: Kalamazoo, MI, USA
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Too big of a Spark Plug Gap? (TIMSPEED)

You are welcome! Happy to hear your car's runnin strong.

It's about time I'm able to help someone else on the forum after all the help I have received from the members. :) :)
Scott LeMuke is offline   Reply With Quote
Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Reload this Page Too big of a Spark Plug Gap?
 
 
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Interesting story about spark plugs REELAV8R C3 Tech/Performance 9 05-11-2015 10:55 PM
p600b is not too small for a 383 drive it C4 Forced Induction/Nitrous 9 04-04-2015 10:19 PM
Spark plug gap, 383 crate motor, autolite 26's FireballXL5 C3 Tech/Performance 19 05-26-2014 04:46 PM
1979 corvette spark plug gaps RED 72 VETTE C3 Tech/Performance 2 05-05-2009 07:11 AM
Spark Plug Gap Questions bence13_33 C3 Tech/Performance 18 06-09-2003 07:01 PM


Tags
01, 99, big, bog, c4, caravan, corvett, dodge, gap, happen, large, plug, problem, recomentdations, results, spark, sparkplug

Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump



All times are GMT -4. The time now is 08:26 PM.