Help my engine backfires in the carb!

My engine of my Opel ('(78) started backfiring in the carb. I checked ignition timing, valve timing, cleaned the carb. But nothing seems to work. At idle the engine sounds good, but at higher revs the backfiring starts. Who has an idea? -- _____ _____ / __) (__ \ / (__|___________________________|__) \ / | | \ / | Greatings from 20 feet | \ / | below sealevel | \ \ | | / \ | Pieterjan van woerkom | / \ | & | / \ | Jessica Rovers | / \__| |__/ | | | [link lost in import: /~svb/texel] | |_________________________________|

It sounds like u have a worn cam lobe. Pontiacs have a really bad problem with this. Its probably an exhaust lobe. Pull a valve cover and look at the rocker arms while its running and u should be able to see one not moving up and down as much.

Cut down the detail to increase the frame rate and all of your backfiring problems should disappear. I hope that this problem will be removed if a patch is ever released.

Check for lean fuel mixture (clogged jets) and vacuum/mechanical advance operation. following was written: -- 10/06/96 04:43 --------- Using: OUI TE 1.5 from http://www.dvorak.com

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>following was written: >> My engine of my Opel ('(78) started >> backfiring in the carb. >> I checked ignition timing, valve timing, >> cleaned the carb. But nothing >> seems to work. At idle the engine sounds >> good, but at higher revs the >> backfiring starts. >Check for lean fuel mixture (clogged jets) and vacuum/mechanical advance >operation.

No way, man. You've got one (or more) flat lobes on your camshaft. Get a new cam and lifter set and your problem will disappear. Don't forget to break in the cam as per the instructions or else your new cam will flatten, too. \\|// Wallace J. Bow, ***jock (o o) [link lost in import] ------------oOOo-(_)-oOOo---------------------------------------------- Voice: (505) 275-3969 Data/NASCAR Racing: (505) 291-6417