This is topic So do you think this would cause my car to be so slow? in forum Tech Talk at Northern California Ford Owners  .


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Posted by TheBrain (Member # 35) on :
 
Tonight, I took the JBA shorties and Bassani catted X-pipe off to install my Hooker Longtubes. I took the spark plugs out for clearance and noticed the #7 spark plug was black but the rest looked good. Upon closer inspection, the insulator is cracked
The car never had a "dead" miss, but at times it would run MUCH better than others. I also noticed that the times it ran "not so good", I would have a vibration above 4000 rpm.
Didn't get to run it tonight 'cause I have to tow it to the muffler shop tomorrow to have the custom 3" x-pipe made
What do you think? did my car run a 12.5 @ 106 on 7 1/2 cylinders? I hope so !!!!

Brian
 

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Posted by 66 AC COBRA (Member # 904) on :
 
that would explain why the new combo is slower than the old one
back to the track u go
 

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Posted by TheBrain (Member # 35) on :
 
I hope that explains it, I put those plugs in when I installed the motor and haven't looked at them since. I bet I cracked it when I installed it 2 months ago
If I get the exhaust done tomorrow and the weather gods are kind, I will try to hit Sac on Wednesday

Brian
 

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Posted by shade-tree (Member # 298) on :
 
hope it's not P/V interference!
 

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Posted by TheBrain (Member # 35) on :
 

quote:

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Originally posted by shade-tree:
hope it's not P/V interference!

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Nope, clayed the motor before I put in all together. I have close to .110 on the exhaust side and more than double that on the intake
 

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Posted by Black94 5.0 (Member # 655) on :
 
I'm always suprised how well a spark can jump, your plug still probably had some spark runnin through it....My car has run with a rough idle, with one of the plug wires totally dis-connected and it was still totally drivable!!...I think maybe you have 1mph with a new plug.....Hey, prove me wrong!!! ....Its gonna be hard to track prove if your plug was that bad if you put the 3" exhaust on...Oh well!..

Smoke a Chevy!
 

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Posted by st5150 (Member # 51) on :
 
I had the exact same thing happen to me, but it was the #3 cyl. It ran exactly how you describe. The #7 plug is a 5 minute swap... I guess we'll have to wait until this weekend to see if it fixes your MPH
 

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Posted by KCmustangboy (Member # 1927) on :
 

quote:

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Originally posted by st5150:
I had the exact same thing happen to me, but it was the #3 cyl. It ran exactly how you describe. The #7 plug is a 5 minute swap... I guess we'll have to wait until this weekend to see if it fixes your MPH

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Maybe not he said he might go out on wednesday night I am going for sure
 

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Posted by 93PONY (Member # 60) on :
 
I'm gonna say no...that is probably not the cause.
Sorry Bud.

I crack my sparkplugs all the time. (it's a bitch to install plugs on this car) I've run on the dyno & at the track on cracked plugs.....& I had no problems. I replace them when I find them....no difference in performance.

Here's a test.
Pull off the intake spacers & run the car....no other mods. See what happens.
 

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Posted by shade-tree (Member # 298) on :
 
weird. a buddy of mine cracked a spark plug and he ended up having to re-ring that cylinder.
 

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Posted by TheBrain (Member # 35) on :
 

quote:

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Originally posted by 93PONY:


Here's a test.
Pull off the intake spacers & run the car....no other mods. See what happens.

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Leave it alone already
I told you at the track that the reason I am running the spacer is due to the lack of clearance between my intake and valve cover for my nitrous solenoid.
Here's a deal for you, You buy me an externally polished Edelbrock RPM intake AND NOS Bigshot plate for it, I will take off my GT-40. Until then the GT-40 stays

 

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Posted by 93PONY (Member # 60) on :
 

quote:

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Originally posted by TheBrain:

quote:

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Originally posted by 93PONY:


Here's a test.
Pull off the intake spacers & run the car....no other mods. See what happens.

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Leave it alone already
I told you at the track that the reason I am running the spacer is due to the lack of clearance between my intake and valve cover for my nitrous solenoid.
Here's a deal for you, You buy me an externally polished Edelbrock RPM intake AND NOS Bigshot plate for it, I will take off my GT-40. Until then the GT-40 stays

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Check your PM's..
 

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Posted by jmcclesk (Member # 1355) on :
 
I hope its the plug. I lost a plug wire at the track one day and the et went down 3/10's I hope it is the plug

[ May 06, 2003, 09:14 PM: Message edited by: jmcclesk ]
 

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Posted by jmcclesk (Member # 1355) on :
 
Well have you run it yet????
 

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Posted by TheBrain (Member # 35) on :
 

quote:

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Originally posted by jmcclesk:
Well have you run it yet????

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