Help!! Engine Miss

Ben Kallies · 05-31-2012, 05:20 AM

Joe B,

Thanks for taking the time to jot down all of your thoughts. I too have been thinking more and more about Bill's comment about his carb being set up for WOT. If my leakdown test this weekend shows no issues with the engine, I believe that I'll be turning my attention back to the fuel system.

While your thoughts on the MSD ignition tester are well received, I believe that I've eliminated the MSD box as a possible problem when I tested with the HEI distributor. Your comments on using the frame as a ground are also noteworthy, and something that I'll consider.

I recently had a racer suggest that my valves are set too tight for the Smith lifters, and/or the lifters are not operating properly, and are hanging the valves open. While I've got the valves set the same as on the dyno, I assume that the leakdown test should verify where I stand with this. I'll share the leakdown results this weekend. Thanks again.

-Ben

Mike Taylor 3601 · 05-31-2012, 08:15 AM

Is your miss @ idle or higher RPM or ?
Mike Taylor3601

Ben Kallies · 06-01-2012, 04:48 AM

Mike,

The miss is there from idle on up. Under load at part throttle (like when driving around the block) it seems to hit a wall around 3,000 rpm. On the other hand, when I simply blip the throttle in nuetral, it seems to rev cleanly. I haven't brought the car to the track, or had the opportunity to really put my foot in it to see how it responds. (I live in a busy Milwaukee neighborhood where dropping the hammer would be neither safe, nor recommended. Just firing the car up typically garners a lot of attention, along with a small crowd)

-Ben

05-31-2012, 05:20 AM	#1
Ben Kallies Member Join Date: Jan 2005 Location: Milwaukee, WI Posts: 107 Likes: 2 Liked 0 Times in 0 Posts	Re: Help!! Engine Miss Joe B, Thanks for taking the time to jot down all of your thoughts. I too have been thinking more and more about Bill's comment about his carb being set up for WOT. If my leakdown test this weekend shows no issues with the engine, I believe that I'll be turning my attention back to the fuel system. While your thoughts on the MSD ignition tester are well received, I believe that I've eliminated the MSD box as a possible problem when I tested with the HEI distributor. Your comments on using the frame as a ground are also noteworthy, and something that I'll consider. I recently had a racer suggest that my valves are set too tight for the Smith lifters, and/or the lifters are not operating properly, and are hanging the valves open. While I've got the valves set the same as on the dyno, I assume that the leakdown test should verify where I stand with this. I'll share the leakdown results this weekend. Thanks again. -Ben

05-31-2012, 08:15 AM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,374 Likes: 358 Liked 308 Times in 103 Posts	Re: Help!! Engine Miss Is your miss @ idle or higher RPM or ? Mike Taylor3601

06-01-2012, 04:48 AM	#3
Ben Kallies Member Join Date: Jan 2005 Location: Milwaukee, WI Posts: 107 Likes: 2 Liked 0 Times in 0 Posts	Re: Help!! Engine Miss Mike, The miss is there from idle on up. Under load at part throttle (like when driving around the block) it seems to hit a wall around 3,000 rpm. On the other hand, when I simply blip the throttle in nuetral, it seems to rev cleanly. I haven't brought the car to the track, or had the opportunity to really put my foot in it to see how it responds. (I live in a busy Milwaukee neighborhood where dropping the hammer would be neither safe, nor recommended. Just firing the car up typically garners a lot of attention, along with a small crowd) -Ben