Misfire Problem
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Joined: Nov 2002
Posts: 83
Likes: 0
From: minerva ohio
it sounds like a broken piston skirt or exhaust leak . if it was a valve out of adjustment the ticking would still be present.when the plug wire was taken off. if this engine has forged pistons that would be my first place to look
Race Director
Joined: Sep 1999
Posts: 11,358
Likes: 379
From: Plano TX
My bet is on an exhaust leak. What did you use when you installed your header gaskets? I've found that unless I smear black RTV on both sides of the gasket they will blow out. Also, the gasket will compress after a few days of driving and if you don't retighten the header bolts the gasket blows out.
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
Sorry ! It seems that you already tried this !
You can try to use a stroboscopic light on cylinder #5 and look
at the damper. Try it at different steady engine RPM. If the damper
appears erratic with the strobe light on it : you can be sure it is really
a misfire, and certainly ignition related...
You can try to use a stroboscopic light on cylinder #5 and look
at the damper. Try it at different steady engine RPM. If the damper
appears erratic with the strobe light on it : you can be sure it is really
a misfire, and certainly ignition related...
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by dwncchs
If you want to get rid of the tick and removing #5 does that -just leave the wire off !!!!!
Sorry couldnt resist.Justin did you get the backfire problem fixed?-------- http://forums.corvetteforum.com/show....php?t=1410195
Sorry couldnt resist.Justin did you get the backfire problem fixed?-------- http://forums.corvetteforum.com/show....php?t=1410195
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by JustinD
Well, it ran fine for a couple drives. Then I let it sit for a week, came back and I had the misfire. I will have to check the exhaust gasket.
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Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
Ok, well I pulled the spark plug wires apart and tightened down the header. The ticking noise seems to be gone. Now I just need to get it set just right so it runs like a champ. Also I hit it down to the floor and it seems that the backfire is not there either. It is all coming together very slooooowly.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
I just had it out and the backfire is still there. I think it is a tuning issue now. I need to get the timing dialed in just right and have someone do my carb. when I got home and shut it off it dieseled a bit.
Last edited by JustinD; Aug 7, 2006 at 04:36 PM.