Engine Missing
Thread Starter
Racer
Joined: Sep 2008
Posts: 403
Likes: 7
From: Space Coast Florida
Engine Missing
Comfort me please.. This is the worst feeling in the world especially when I'm so close to finishing.. I noticed a really loud knocking about a week ago, and thought great the stupid plug wires hit a header. After looking though I saw that the gas filter was dripping quite a lot and the engine probably wasn't getting enough gas. I got a new gas filter and Teflon taped the hell out of the retaining nut and everything stopped leaking and all cylinders ran. Well it recently started this again and I'm noticing some dripping from the same place, is there an O-ring that I'm missing that's causing the gas leak and the engine miss or something worse? Cars a 74 350.
Pro
Joined: Oct 2008
Posts: 645
Likes: 1
From: Hayward Wi
Comfort me please.. This is the worst feeling in the world especially when I'm so close to finishing.. I noticed a really loud knocking about a week ago, and thought great the stupid plug wires hit a header. After looking though I saw that the gas filter was dripping quite a lot and the engine probably wasn't getting enough gas. I got a new gas filter and Teflon taped the hell out of the retaining nut and everything stopped leaking and all cylinders ran. Well it recently started this again and I'm noticing some dripping from the same place, is there an O-ring that I'm missing that's causing the gas leak and the engine miss or something worse? Cars a 74 350.
Thread Starter
Racer
Joined: Sep 2008
Posts: 403
Likes: 7
From: Space Coast Florida
Carb is stock, I see the point with the teflon tape, fraying and clogging up the filter.. That makes sense. I don't have a pic at the moment because its about midnight, but its right above cylinder 8? (last cylinder on right passenger side) going into the carb from the fuel pump. Its like a metal nut with a metal line going into it from the pump. That probably won't suffice and I apologize. But when gas is pumped you can see it leak noticeably.
What I'm worried about is, was this the engine miss problem?
What I'm worried about is, was this the engine miss problem?
Last edited by 21boy; Apr 29, 2009 at 11:03 PM.
Drifting
Joined: Jul 2005
Posts: 1,562
Likes: 2
From: Spring Texas
If that gas leak continues, you won't need to worry about the engine missing. Everything will be missing, as in up in smoke.
If it is missing at idle or low speed, it is probably not a fuel starvation issue. The carb may still be the source of the miss if it is not set up correctly and properly adjusted. More than likely its a bad plug, or plug wire. Next up the chain would be a stuck valve or one that is not seating properly. It gets worse, and more expensive after that.
If it is missing at idle or low speed, it is probably not a fuel starvation issue. The carb may still be the source of the miss if it is not set up correctly and properly adjusted. More than likely its a bad plug, or plug wire. Next up the chain would be a stuck valve or one that is not seating properly. It gets worse, and more expensive after that.
Thread Starter
Racer
Joined: Sep 2008
Posts: 403
Likes: 7
From: Space Coast Florida
Probably a plug wire malfunction I'm hoping. They're new, but the longer ones weren't set under the engine properly so they could have hit the headers or just malfunctioned some how. Really hope it is.. and that my engine doesn't explode from leaking fuel line. haha thanks guys.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
NAPA parts stores and others have oversize carb inlet fittings for stripped Rochester quadrajet carbs. There should be a gasket between the carb inlet fitting and the carb body to seal the fitting to the carb. Take the fitting back off (there should be a fuel filter and spring inside?) look at the threads and see what kind of shape they are in, if they are stripped, you need oversize fitting for second chance at getting it right. Look at a shop manual for fuel filter replacement to see what your Vette needs to do the job correctly. Do it once and do it RIGHT!
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
I would not use the self threading nut, it is not a permanent fix. Take the carb to a carb repair place for a threaded insert. If you use the self threading nut, and it leaks again, the carb is not repairable as there won't be enough metal for the inserts.
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Thread Starter
Racer
Joined: Sep 2008
Posts: 403
Likes: 7
From: Space Coast Florida
NAPA parts stores and others have oversize carb inlet fittings for stripped Rochester quadrajet carbs. There should be a gasket between the carb inlet fitting and the carb body to seal the fitting to the carb. Take the fitting back off (there should be a fuel filter and spring inside?) look at the threads and see what kind of shape they are in, if they are stripped, you need oversize fitting for second chance at getting it right. Look at a shop manual for fuel filter replacement to see what your Vette needs to do the job correctly. Do it once and do it RIGHT!
As for the miss I'm going to move some spark plugs around and see if the problem moves and take care of that.. But thanks a lot guys.
