Changed ignition system - miss at idle
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Changed ignition system - miss at idle
Well I got the Might Demon dialed in (theose transfer slots are critical) and the engine was running good using the stock HEI dist. I decided to go ahead and add new 8.5mm wires, the Mallory HyFire ignition (new) and a Mallory distributor (used - non vacuum advance-- mechanical advance set to 24 degrees) to complete the package. Car fired right back up but was really missing below 1000. Above 1500 it pulled really hard and all the timing came in (39 degrees at 2800) as expected. Intial timing was still set to 18 degrees (same as HEI) .
Anyone have any idea what may be causing the low speed miss?. It didn't do this with the HEI.
Anyone have any idea what may be causing the low speed miss?. It didn't do this with the HEI.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
No - nothing loose. What I did notice is that starting is now very labored when hot (even though I'm still set at 18 initial like I was with the HEI). Wasn't labored with the HEI at 18. Something is not quite right. I don't think I'm off a tooth...but if I was, would that cause the problem? I mean even though I'm reading 18 degrees advance it's really more? Sort of confused now and need the input of fresh forum eyes.
Pro
Joined: Jan 2006
Posts: 548
Likes: 0
Originally Posted by Hvymtlc5
No - nothing loose. What I did notice is that starting is now very labored when hot (even though I'm still set at 18 initial like I was with the HEI). Wasn't labored with the HEI at 18. Something is not quite right. I don't think I'm off a tooth...but if I was, would that cause the problem? I mean even though I'm reading 18 degrees advance it's really more? Sort of confused now and need the input of fresh forum eyes.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Thinking it has something to do with the curent cam and the lack of a vaccum advance. Reinstalling the HEI to make sure the problem goes away. The Mallory is a lot tighter and better built distributor than the factory HEI...wish it would work.
