Howdy y’all!
First off I want to say thank you to all the members here who have unwittingly helped me work on this car while I’ve been stalking threads.
Now onto business. I have an efi 5.0 in my 87 ‘stang with enough mix & matched upgrades to give you a headache. Out of the blue, after driving it for a while since replacing all ignition components besides the dizzy, (plugs, wires, tfi, cap & rotor, coil) it starts idling rough, and I don’t think it could have drove anywhere, didn’t try. Closer inspection reveals I am getting no spark to #1 plug at the DIS cap. With the engine running I can touch the tower barehanded. I didn’t know this was possible, and apparently neither did google as I can’t find anything remotely similar. The only thing I can think of is that the MSD dizzy is shot, but that still doesn’t make much sense cause if the magnets were going wouldn’t it be erratic misfires and not a steady #1 miss???
No codes besides #34 which is the egr. Which is blocked off with lmr’s kit.
Verified compression & that all components are indeed working. Ohm’d all wires to tfi and coil. Swapped #1 & #6 wires placements at the cap to verify the tower was the problem. Timing set at 12°.
The dizzy is the only thing that bothers me, as I don’t know how to test it. But nothing was broken inside. Gears fine.
Can the computer cause this?? I’m going to pull it later and check for breaks anyway.
So far it has stumped all my mechanic family members and our sanities are going to go out the window soon if we keep dreaming about this crap.
At this point the only option I can think of is getting it scoped.
Recapping, it was driving absolutely fine. One morning a few days ago started it up and no spark to #1 at the dis.
Sorry for the long-winded ness of the post, I appreciate any help you might have. If you want a list of parts... I still don’t know all it has internally. As for ignition components, MSD dizzy, I don’t have a spare and would prefer to avoid spending money until I’m sure of the problem, motocraft coil, select tfi, (and MSD spare) streetfire cap & rotor (brass)
If I missed anything please let me know.
- Wolf out
First off I want to say thank you to all the members here who have unwittingly helped me work on this car while I’ve been stalking threads.
Now onto business. I have an efi 5.0 in my 87 ‘stang with enough mix & matched upgrades to give you a headache. Out of the blue, after driving it for a while since replacing all ignition components besides the dizzy, (plugs, wires, tfi, cap & rotor, coil) it starts idling rough, and I don’t think it could have drove anywhere, didn’t try. Closer inspection reveals I am getting no spark to #1 plug at the DIS cap. With the engine running I can touch the tower barehanded. I didn’t know this was possible, and apparently neither did google as I can’t find anything remotely similar. The only thing I can think of is that the MSD dizzy is shot, but that still doesn’t make much sense cause if the magnets were going wouldn’t it be erratic misfires and not a steady #1 miss???
No codes besides #34 which is the egr. Which is blocked off with lmr’s kit.
Verified compression & that all components are indeed working. Ohm’d all wires to tfi and coil. Swapped #1 & #6 wires placements at the cap to verify the tower was the problem. Timing set at 12°.
The dizzy is the only thing that bothers me, as I don’t know how to test it. But nothing was broken inside. Gears fine.
Can the computer cause this?? I’m going to pull it later and check for breaks anyway.
So far it has stumped all my mechanic family members and our sanities are going to go out the window soon if we keep dreaming about this crap.
At this point the only option I can think of is getting it scoped.
Recapping, it was driving absolutely fine. One morning a few days ago started it up and no spark to #1 at the dis.
Sorry for the long-winded ness of the post, I appreciate any help you might have. If you want a list of parts... I still don’t know all it has internally. As for ignition components, MSD dizzy, I don’t have a spare and would prefer to avoid spending money until I’m sure of the problem, motocraft coil, select tfi, (and MSD spare) streetfire cap & rotor (brass)
If I missed anything please let me know.
- Wolf out
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