Going to test the coil packs tomorrow. How?

DRPowerStroke · 02-06-2008, 06:45 AM

I have a ohms reader. How to I test the coil packs? Step-by-step would be nice

Thanks guys!

**Ssicarman** · 02-07-2008, 01:42 AM

Assumption is that you mean a multimeter? More functions on it than just the ohm meter?
If you have instructions for it have a look at them to see what you need to do to run the meter. If you don't then it depends on the meter what you need to do. A self ranging meter you just put the leads to where you are measuring. A manual/non self ranging meter you need a setting that will display 5,000 to 10,000 ohms.

The coil testing for resistance:
Across the two towers where the plug wires go you want to see approx 8,000 ohms. If that is good then take one lead and put it to a good ground point on the engine (assumption being that the coil is still installed in the car) and the other still on a tower. You want to see a reading of open or infinate (depends on the meter). If you see anything less than that even somethign in the milliosn of ohms then the coil is bad.

DRPowerStroke · 02-07-2008, 01:48 AM

Quote:

Originally Posted by Ssicarman

Assumption is that you mean a multimeter? More functions on it than just the ohm meter?
If you have instructions for it have a look at them to see what you need to do to run the meter. If you don't then it depends on the meter what you need to do. A self ranging meter you just put the leads to where you are measuring. A manual/non self ranging meter you need a setting that will display 5,000 to 10,000 ohms.

The coil testing for resistance:
Across the two towers where the plug wires go you want to see approx 8,000 ohms. If that is good then take one lead and put it to a good ground point on the engine (assumption being that the coil is still installed in the car) and the other still on a tower. You want to see a reading of open or infinate (depends on the meter). If you see anything less than that even somethign in the milliosn of ohms then the coil is bad.

Ok. I got a reader and it said when I put it on the two towers 1460 on one coil and 1960 on the other coil. Not sure if the reader was fine or I was doing it wrong. I took reader back and replaced the coils at AutoZone $39 each (epoxy filled). Seams to run better. Stronger. BUT, still drops that 200rpm's from 2nd to 3rd. I also think I am getting better mpg. Estiamte around town 30mpg (after coils were replaced). Better than 25mpg (before coils) as previously posted. I will post back as that's an estimate.

RC1488 · 02-08-2008, 04:55 PM

Quote:

Originally Posted by DRPowerStroke

Ok. I got a reader and it said when I put it on the two towers 1460 on one coil and 1960 on the other coil. Not sure if the reader was fine or I was doing it wrong. I took reader back and replaced the coils at AutoZone $39 each (epoxy filled). Seams to run better. Stronger. BUT, still drops that 200rpm's from 2nd to 3rd. I also think I am getting better mpg. Estiamte around town 30mpg (after coils were replaced). Better than 25mpg (before coils) as previously posted. I will post back as that's an estimate.

Automatic or manual?

Assuming Automatic:
The drop of 200rpm's is more likely the Torque Converter locking. On the S-series (unlike most cars) the TC locks in 2nd, 3rd, and 4th gear.

DRPowerStroke · 02-08-2008, 05:30 PM

Quote:

Originally Posted by RC1488

Automatic or manual?

Assuming Automatic:
The drop of 200rpm's is more likely the Torque Converter locking. On the S-series (unlike most cars) the TC locks in 2nd, 3rd, and 4th gear.

THANKS! I feel better. I wonder why after 2nd? I can understand 4th.