Re: BlacksmokeBackfire

Posted by Hoosierbuddy on April 10, 2003 at 11:07:54 from (67.241.18.172):

In Reply to: BlacksmokeBackfire posted by J.Chesher on April 09, 2003 at 15:14:30:

I have a 54 SH and it had the same problems.

1.The timing was off
2.The carb idle air screw was set to "factory " specs,but it needed to actually be turned almost All the way out to get it correct!
3.Installed a new thermostat,the engine Never warmed up enough for proper combustion.
4.Went to Champion D-21 Sparkplugs.A lot of people say Champs don't work,but then again a lot of people Love old wives tales.If the plugs heat range requirments are met,it doesn't matter what brand you use-Champion was the original plug installed from IH from the factory so why not?
If D-21 's still look bad after all the carb/ignition adjustments you may want to go to D-23 or down in range to D-18-look at the plugs and they will tell you if it's still too rich or it's got an oil control problem.However,Black smoke is too rich,White smoke is oil control/coolant problems.
5. Change the oil-if you were running that rich for so long,the oil will be diluted somewhat.
6.The valves were out of adjustment-some loose, most too tight
Hope this helps some,
HB

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