Car bogs and backfires??

[lillee64]

I have a 78 buick regal with a chevy 350 and a rochester qjet. the car idles fine but when i give it gas it backfires through the carb and/or kills. once i turn it off, it backfires about 2 seconds from the exaust pipe. the choke is opening all the way just fine, idle is great, but i think it may be running too rich?

 

[81Regal]

What is the timing set at?

 

[jacobdavis1979]

r u sure it idles fine? its not missin or nothin? if it does it when u give it gas it backfires and dies that kinda sounds like a timing problem. id try advanceing or retarding the distributor and see if that helps any. maybe try raiseing the number one piston to top dead center then take ur distrubutor cap off and see if the rotor bug is pointing towards the number 1 piston if it is then ur timings close. it can be off a tiny bit but if its off by a big margin then it needs to be set back in right

 

[78PontiacGP]

Sounds like a timing issue, check your mixture screws to.

 

[deathproof]

i had the exact same problem the last few weeks. get a timing light and a vacuum gauge. tune the carb and set the timing right (mine is about 12 degrees btdc) you'll be good to go.

 

[lillee64]

thanks guys, my timing was off

 

[pontiacgp]

thanks guys, my timing was off

I'd say your timing was pretty good.....you got a quick reply to to the problem...