Back firing problems?
Thread Starter
Racer
Joined: Jul 2007
Posts: 256
Likes: 0
From: Glasgow, Scotland
Back firing problems?
my 78 vette,(L48) has started back firing into the air filter when i rev it and has bangs coming from zorst at idle every 10 secs or so, seems to idle at about 1000rpm?
any ideas on my problem??
cheers
dave
any ideas on my problem??
cheers
dave
Pro
Joined: Oct 2006
Posts: 564
Likes: 0
From: London
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
Backfiring is a lean condition. Check the idle mixture settings, fuel filter and accelerator pump. What kind of carburetor is this and what is the initial advance set at?
BigBlockk
Later.....
BigBlockk
Later.....
Thread Starter
Racer
Joined: Jul 2007
Posts: 256
Likes: 0
From: Glasgow, Scotland
its a Q - jet, dont know what the advance is(what should the initial advance be on a L48 engine with headers)?, where abouts is the fuel filter and is a clean out job, or new one?,
Last edited by agent kronus; Jul 29, 2007 at 04:06 AM.
Instructor
Joined: Dec 2006
Posts: 207
Likes: 0
From: Keller TX
Here is a post that will help you understand timing. Print it and the other articles (links) in this post and keep reading them. Get out under the hood and take a look.
Also, if you have the service manuals for your car, it will help you with the location and changing of the fuel filter. You can get manuals on ebay.
http://forums.corvetteforum.com/show....php?t=1430339
Doug
