Ignition or fuel break up?
Thread Starter
Drifting
Joined: May 2000
Posts: 1,478
Likes: 38
From: Long Island NY
Ignition or fuel break up?
Engine runs good when started. A bit hard starting. It does have mild cam however, I don't know what type. At higher rpm's 350 starts to loose power, breaking up. It will regain power then will loose power again, at times stalling. Also major popping when down shifting. Just need some thoughts here where to go. Ignition, timing, fuel pump, accelerator pump? Thanks.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Fuel- since it hits good, then drops off, then hits again. Sounds like a fuel delivery issue. I'd still check all the timing too. Popping on decel could be it's going lean or the exhaust is sucking air.
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
I just had the same problem. Cleaned the fuel filter element and set the float levels in the carb (Holley). I don't know what carb and filter set up you are using. It may simply be a fuel filter that needs to be replaced. Let us know what you found.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
On the float bowls there is a brass plug, fuel level should just get the threads in the bowl wet when you shake the car or just barely above that.
Timing will most likely be a little more advanced than the factory specs due to more cam.
Timing will most likely be a little more advanced than the factory specs due to more cam.
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
Here is a link for correcting the float level...
http://documents.holley.com/techlibr...carburetor.pdf
http://documents.holley.com/techlibr...carburetor.pdf
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