I am new to the site. I have a 93 Mark VIII 175000 miles still runs like a champ. driving home the other day the car started sputtering and felt like it was firing on one side of the motor only. I floored it just to get to 25mph. Pulled it in my shop and looked it over. No cel was on so I put new plugs in al pass side were nice and tan and all drivers side were soaked to the bone and no results. the next day after work I checked some things. Got it running and grabbed the cats. Drivers side was cold as ice and the passenger side was hot as hell. Reading alot on this site I put 2 coil packs on and still the same thing Things I have put on this year are fuel pump,fuel filter plugs and wires O2 sensors both sides. and I havent had a cel in months and the memory is empty from the last reset. gonna check the fuel pressure tomorow but i pushed the valve and it squirted alot of gas out but that doesn't mean anything till you put the gauge on it. I personally think the chain broke on the exuast side of the cam.
93 mark No spark on drivers side
- Thread starter marknit
- Start date
topher5150
Dedicated LVC Member
I don't think you would be moving at all if you broke a chain
Your probly right. Would iac falure cause these symptoms? It doesn't even fire anymore. Ill give it a break till tomorrow so i dont have to buy a starter next.
bryantaylor
Dedicated LVC Member
are the other coil packs good? try just switching pass and drv side coils to see is the problem changes sides. if the coil is good and there is no spark on only one side, its 99% thats its a wiring problem, check over the harness really good.
unity
Dedicated LVC Member
Very very odd. Two plugs not firing I could see happening, but there really is no way for them to fail on just one side.
There are four trigger wires. You can look at the coil packs and see this, center is +12, outers are the triggers. This also means two spark plugs fire at once and usually they are on opposite sides of the engine. So lets take the passenger coil pack for example. Split it down the middle from back to front. One the left I think is wires for 1 & 6. So when the trigger goes off 1 & 6 fire at the same time. This is also called wasted spark since one of those are firing on the exhaust stroke.
So if a coil in a coil pack when bed (2 coils per pack, not 4) then you loose spark on 1 & 6 for example. Both sides of the engine, not one side and still you loose two, not four. Even if you have a complete coil pack go bad you would still not be out of spark on just one side.
Something else is up and the way its wired it makes no sense unless the EDIS module went south. But again if it did it would not command spark in the same manner that a coil or two went bad and you would not end up with no spark on just one side.
There are four trigger wires. You can look at the coil packs and see this, center is +12, outers are the triggers. This also means two spark plugs fire at once and usually they are on opposite sides of the engine. So lets take the passenger coil pack for example. Split it down the middle from back to front. One the left I think is wires for 1 & 6. So when the trigger goes off 1 & 6 fire at the same time. This is also called wasted spark since one of those are firing on the exhaust stroke.
So if a coil in a coil pack when bed (2 coils per pack, not 4) then you loose spark on 1 & 6 for example. Both sides of the engine, not one side and still you loose two, not four. Even if you have a complete coil pack go bad you would still not be out of spark on just one side.
Something else is up and the way its wired it makes no sense unless the EDIS module went south. But again if it did it would not command spark in the same manner that a coil or two went bad and you would not end up with no spark on just one side.
ford nut
Local nut case
Check every hole for spark.
Your doing alot of guessing.
And throwing money at it like its a stripper.
Have you ever gave it a full tune up?
I bet bad wires.
Your doing alot of guessing.
And throwing money at it like its a stripper.
Have you ever gave it a full tune up?
I bet bad wires.
kracker
Active LVC Member
i had a issue like this and it turned out to be that the coils were grounded properly. so i just cleaned the bases and put them back in an wala spark
unity
Dedicated LVC Member
You have coils, a 93 does not.
BAD97LSC
Dedicated LVC Member
i have about 30 computers, whats the code on yours i'll have it i'm sure!