Plugs keep fouling out. Think I found out the solution
01-18-2008, 01:03 PM
#23
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
RE: Plugs keep fouling out. Need some help
This is how you take a pic of a spark plug. I couldn't tell anything by your picture. According to my dyno run my car is running rich at 10.8 to 1. If your car won't idle then you must have a vacuum leak or some other problem. Maybe it's as simple as your idle rpms are set to low.
01-18-2008, 01:31 PM
#24
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Join Date: Dec 2007
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RE: Plugs keep fouling out. Need some help
ORIGINAL: Dex
I change my plugs and the car starts a few times but runs lean. I come back a few days later and now the car wont start again and the plugs look the same as the last ones. Im wondering if they can go bad that quickly from being too lean? This is the best picture I could get. It almost looks like oil on it too...but there are new pistons and rings so how could that happen?
[IMG]local://upfiles/64043/83F27A8A7288448790ED4EFA54B43580.jpg[/IMG]
I change my plugs and the car starts a few times but runs lean. I come back a few days later and now the car wont start again and the plugs look the same as the last ones. Im wondering if they can go bad that quickly from being too lean? This is the best picture I could get. It almost looks like oil on it too...but there are new pistons and rings so how could that happen?
[IMG]local://upfiles/64043/83F27A8A7288448790ED4EFA54B43580.jpg[/IMG]
01-18-2008, 01:48 PM
#26
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Thread Starter
Join Date: Mar 2007
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Posts: 2,257
RE: Plugs keep fouling out. Need some help
compression was checked. no miles on the motor...maybe .00001 miles from starting it. AFR is reading 16 and when i would rev it the AFR would drop to 15's. All the plugs are the same. Dont know why the gaskets wouldnt be sealed...
Im going to check the ground strap tonight because thats all i can think of. Idle wont ruin spark plugs
Im going to check the ground strap tonight because thats all i can think of. Idle wont ruin spark plugs
01-18-2008, 01:54 PM
#27
5th Gear Member
Join Date: Apr 2007
Location: The High Country
Posts: 3,547
RE: Plugs keep fouling out. Need some help
ORIGINAL: moosestang
This is how you take a pic of a spark plug. I couldn't tell anything by your picture. According to my dyno run my car is running rich at 10.8 to 1. If your car won't idle then you must have a vacuum leak or some other problem. Maybe it's as simple as your idle rpms are set to low.
This is how you take a pic of a spark plug. I couldn't tell anything by your picture. According to my dyno run my car is running rich at 10.8 to 1. If your car won't idle then you must have a vacuum leak or some other problem. Maybe it's as simple as your idle rpms are set to low.
Almost make me get a woody just looking at it. You got anti seize on your threads. Shame on you.
01-18-2008, 02:02 PM
#28
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Join Date: Dec 2007
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Posts: 90
RE: Plugs keep fouling out. Need some help
So this is all happening during intitial startup after having the motor apart and replacing internal parts?
Has the engine run long enough for you to properly heat cycle it?
The oil on the plugs (a very small amount) wouldn't worry me a ton just yet - give the rings time to seat.
Get a good tune on that thing - the first several runs on that engine can have a huge impact on reliablity and power later on.
Has the engine run long enough for you to properly heat cycle it?
The oil on the plugs (a very small amount) wouldn't worry me a ton just yet - give the rings time to seat.
Get a good tune on that thing - the first several runs on that engine can have a huge impact on reliablity and power later on.
01-18-2008, 02:13 PM
#29
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Join Date: Mar 2007
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RE: Plugs keep fouling out. Need some help
ORIGINAL: LTMGlobal
So this is all happening during intitial startup after having the motor apart and replacing internal parts?
Has the engine run long enough for you to properly heat cycle it?
So this is all happening during intitial startup after having the motor apart and replacing internal parts?
Has the engine run long enough for you to properly heat cycle it?
Nope
Hoping its a ground problem because then that will be easy haha the car is CURSED!
01-18-2008, 02:15 PM
#30
2nd Gear Member
Join Date: Jan 2006
Location: Illinois
Posts: 415
RE: Plugs keep fouling out. Need some help
I dont what Mod's you have. But your air fuel mixture should be in the 12's to be running safe. At 15 or 16 your running so lean your going to melt your plugs. Your air fuel mixture shouldn't spike at high RPM's if it's tuned properly.