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Author Topic:   weird ignition problem
bkap
Dirt Full Roller

Total posts: 30
posted May 02, 2001 05:04 PM
I'm having a strange ignition problem with an HEI with an external Holley Lazer Pro Shot coil and Anniliator ignition box (its the Speedway Motors kit). The problem is that the brush, which goes through the cap and rides on the rotor, is getting so hot that it's melting the plastic where it rides on the cap. The melted plastic then mucks up the rotor and the engine won't run well. The brush has the small spring on it that extends up through a rubber grommet and comes into contact with a coil terminal extension.

I've been told by Holley that it could be caused by resistance from not grounding the coil body to itself. I'll try this but I'm kind of reluctant to throw another cap and rotor at it until I get this figured out. It did it while running in a rebuilt engine for 5 minutes last Saturday.

Has anyone had a similar problem? Any thoughts? I'd like to run the new car this weekend but this problem is slowing down the process quite a bit.

Gene
Dirt Full Roller

Total posts: 48
posted May 02, 2001 10:34 PM
This problem is typical with OEM stuff. Several companies make a better set-up that will fit your cap&rotor. Call Speedway and tell them about your problem, they may replace your burnt stuff for free. It should not have melted

bkap
Dirt Full Roller

Total posts: 30
posted May 02, 2001 11:03 PM
Thanks Gene. This is the second time it happened with this setup. I found the first one when I took it out of the old car. Then it happened again. Maybe it was a bad batch of caps and rotors, although they didn't say anything when I ordered replacements from them last week. I'll give them another call tomorrow. I may try a cap and rotor off the parts store shelf tomorrow night to see what happens to them.

Do you buy into Holley's resistance idea?

neverenoughbrew
Dirt Roller

Total posts: 20
posted May 03, 2001 07:32 AM
quote:
Originally posted by bkap:
I'm having a strange ignition problem with an HEI with an external Holley Lazer Pro Shot coil and Anniliator ignition box (its the Speedway Motors kit). The problem is that the brush, which goes through the cap and rides on the rotor, is getting so hot that it's melting the plastic where it rides on the cap. The melted plastic then mucks up the rotor and the engine won't run well. The brush has the small spring on it that extends up through a rubber grommet and comes into contact with a coil terminal extension.

I've been told by Holley that it could be caused by resistance from not grounding the coil body to itself. I'll try this but I'm kind of reluctant to throw another cap and rotor at it until I get this figured out. It did it while running in a rebuilt engine for 5 minutes last Saturday.

Has anyone had a similar problem? Any thoughts? I'd like to run the new car this weekend but this problem is slowing down the process quite a bit.


Could be caused by exsesive spark plug gap also. Large plug gap increases secondary resistance and increases voltage, and can cause rotors and caps to burn up. I do not recommend using HEI style ignitions, you will save monney and headaches in the longrun by investing in a good MSD distributor and box.

Gene
Dirt Full Roller

Total posts: 48
posted May 03, 2001 10:33 PM
Make sure you get the heavy duty button, spring, and wire that goes from the cap to the rotor. I cant recall the name, duh on me I guess. Anyhow, this is an important part to have to eleminate your problem. I would assume your parts should be H-D. Perhaps they sent you oem by mistake. Gene

bkap
Dirt Full Roller

Total posts: 30
posted May 04, 2001 03:46 PM
Last night I put on a stock cap, left out the rubber grommet that the Speedway instructions call for above the button and it ran well, at least in the garage. We had to extend the rod from the external coil (using a washer) to take up the play in the button.

We also did what the Holley rep said -- grounded the coil housing. We left the spark plug gap at the .045.

So I'm still a little confused. Were the two Speedway caps and buttons defective? **** , I don't know but at least it now runs. I think the lesson is to stick with an MSD next time. I tried to save a few bucks but got bit.

Now on to all the other last-minute problems. :-}

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