I have a 1995 ram 2500 with a v10 and a 5 speed.It has been acting up lately if you keep it above 2000 rpm there is no problem runs fine,but if you let it drop below 2000 rpm it will immedatly turn on check engine light and start skipping.it does this hot or cold.took it to a shop and it gave code 43 on a snapon scanner I belive it said check #2 coil drver circut.the guy said he thought it was the coil pack,so I called the local dodge place and talked to a tech and he said pcm or wiring he had never seen a coil pack go bad. So my question is has anyone ever run across this one because I dont want to start throwing parts at it because their all pretty expensive. Any one got any advise where to start?

 

I have seen more failed coil packs than I can shake a forest at.... its a coil. plain and simple. Coils fail. General failure mode is at higher RPM though...... seems kinda odd that the more demand you put on it, the better it works....... What do the plugs on that coil pack look like compared to a couple others?

 

plugs look ok not sooted up or anything.when it does this going down the road you can turn off ignition and turn back on and it goes away again as long as its over 2000 rpms.what does cutting key off have to do with it does it reset comp or what ?also is there any way to check the coil with ohm meter?thanks for any and all help

 

You can ohm check the coils, though I don't have the correct values right here handy.... but, unless the coil is currently in failure mode, you won't find anything that way. I would more wonder if the injectors weren't to blame, more than the coil pack. If it was indeed a coil causing the trouble, you would see the same issue on both cylinders that coil services.....

Are you getting any misfire codes? Have you check the wiring for the number 2 coil? (whichever one that happens to be.....)

 

V10 Coil Resistance is as follows:
Primary Resistance 0.53 to 0.65 Ohms
Secondary Resistance 10,900 to 14,700 Ohms (or 10.9 to 14.7 K-Ohms)

Remember primary resistance is measured where the harness plugs into the pack between the positive and the other negative connections. So for the pack with three coils the positive is the upper right pin, others are negative. And for the pack with two coils the positive is the center pin outside are negative. While secondary resistance is measured between the coil towers (where the plug wires attach to the coil) and is taken between the companion cylinders. So just measure from on tower to the one directly below it.

I've had coils on other cars act like this, where they run better at higher RPM. The coil is not dead, they just are out of the resistance specifications. So it still fires, just a bad spark. Good luck.

 

Hi everyone,

we own a 1996 Dodge 3500 V10 with 5-spd manual. We were pulling a very heavy load over mountainous roads in B.C. this weekend and had the same issue with the engine skipping as soon as the rpm dropped below 2,000 rpm. It only happens at full throttle and stops when you take the foot off the gas slightly or when you shift down.
It got to the point where you could hear a metallic noise sort of like pinging, but not the same.

No fault code set so far.
Idler air valve, MAP and TPS sensor were replaced last year.

Haven't checked the spark plugs yet. Truck runs and idles fine and has lots of power otherwise.

Suspecting the PCM or the coils or the ASD replay possibly?
Anyone solved this yet?

 

I would consider taking a look at fuel pressure..... At low RPM, under heavy load, there is a high demand, if the pump can't keep up... you get either a miss, or spark knock, or both.