455 has begun to bog with any throttle

Agreed, and as an add on and was mentioned earlier but not in this post, you will probably still have to replace your plugs as they are most likely fouled anyway. So even with the temporary 12v hooked up, you may still not get it to fire until those plugs are changed also.

 

Sounds good. Thanks again. Ill upload a pic of this wire tho for the sake of it. In case anything visual can tell you anything in the meantime

 

Yeah that was my takeaway from it. Fair enough. Well, while everyones here... Suggested plugs and gaps? There's ngks in it currently.

 

The wire in question. Spliced quite obviously.

 

Well glad we could help. I had a feeling that was your issue.

 

Thx fellas will attempt all this sometime this weekend

 

Ok. Battery freshly charged. I may have been testing the ignition in the wrong position yesterday like an idiot. So however its reading 12.4 in "run" and drops down to 9 before getting back to 11 under cranking. Ill pull the plugs here shortly and report my findings

 

Interesting, 9v was about the voltage that the resistance wire is supposed to cut it down to.

 

Havent torn apart the loom yet but could the wiring have been done correctly than? Had a feeling we tied everything in as it was when we installed the new harness tbh.

 

Looks like ill need new plug wires as well then hahah jesus

 

Lol jeez, those plugs have probably been in there since my dad was in high school

 

Well they say Carquest on em so couldnt be original, lol. Yeah... I suppose ill swap em out tho. Tryna save some money. Never happens.

 

Ha! Burn the car now. You'll thank me later.

 

Hey Larry appreciate the link, grabbed these plugs.

Whats the consensus wires? Spiral core? 8mm?

 

Yikes

 

Yeah, there ya go. The smoking gun. Definitely pointing to a voltage issue now.

 

8 outta 8 like that. Some worse than others. Had to persuade em out w the jack handle. I was careful tho. Had liquid wrench sittin for like 5 or 6 hrs. Anyway! So. New wires ya think? Those boots or whatever were separating like i photo'd but can always stick em back together!

 

Stick em back together for now, but if the problem doesn't go away, there's only a few things you can change after you fix the resistance wire and get new plugs.

Like Larry said, get a wire and jump it from the positive of the battery to the ignition hot side of the HEI with your new plugs. It should run like a new engine after that. You could even put in an inline "on-off" switch if you wanted to get fancy while testing.

 

Fair point. 12g?

Also, anything i had ought to do before i put the new plugs in? Theres still a good amount of liquid wrench around im gonna wipe w a rag and ive heard not to put anti seize on the new plugs.