What caused it to this?
Thread Starter
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
What caused it to this?
My car having horrible miss Friday. I am thinking it gotta be the plug are bad because the wires are about 3000mile on it. I pull the plugs today. it all shot and #7 plug, missing the electro tip? and the L shape thing are closed shut. Here the the pics. What caused the plug to do this?? it is Auto lite 104. I now try 103 see what happen next.
It is about 15psi of boost
It is about 15psi of boost
Melting Slicks
Joined: Jun 1999
Posts: 2,872
Likes: 3
From: Wilmington NC
Bruce,
the pictures are a little bit on the blurry side, but it looks like the #7 plug is covered in oil?
closed plugs = detonation
missing the hook of the plug = extreme heat melted off
looks like you are running lean or you are running too much timing under boost perhaps.. need to figure out whats going on, but I would keep my fingers crossed it is just the plugs that look like that and not you pistons. let us know what ya find.
also have you run a compression test/ leak down test to distinguish you still have good ring seal?
let us know!
Chris
the pictures are a little bit on the blurry side, but it looks like the #7 plug is covered in oil?
closed plugs = detonation
missing the hook of the plug = extreme heat melted off
looks like you are running lean or you are running too much timing under boost perhaps.. need to figure out whats going on, but I would keep my fingers crossed it is just the plugs that look like that and not you pistons. let us know what ya find.
also have you run a compression test/ leak down test to distinguish you still have good ring seal?
let us know!
Chris
Thread Starter
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
Chris
The car run great after I put in new plugs, this time I try 2 step colder plug.
Only #7 cylinder plug closed and all other have some what light brown color and I think it has some detonations for sure. The plug look dirty because of the ant-seize I am using. I am going to turn down the boost a little until I get my stand alone engine mangement in the up coming Spring and tune it on dyno.
The car run great after I put in new plugs, this time I try 2 step colder plug.
Only #7 cylinder plug closed and all other have some what light brown color and I think it has some detonations for sure. The plug look dirty because of the ant-seize I am using. I am going to turn down the boost a little until I get my stand alone engine mangement in the up coming Spring and tune it on dyno.
Thread Starter
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
Originally Posted by Baldturbofreak
looks like#7 is eating some oil and knocking, Bruce. That is the same lung that pushed the head gasket out. Id monitor that cyl very carefully.
When I pull the #7 plug. there is no oil in it. It is not wet with oil. The black mark oil like is from the valve cover where the Delteq, oil is been pushed out under boost. Oil has gotten to the plug end that is why you see the black oil marks.
The last time when we have a pushed head gasket were #6, 8 not #7
