How To: Dual Igniton plug mod for 2.3L and 2.5L

[Captain Ledd]

Originally Posted by Shran

One tank down, 18.8mpg combined. That is 75% highway.

Something is wrong with your driving or your truck.

I routinely get high-very high 20's (on a few occasions I did break the 30 mark, but not often).

That kind of mileage is uncalled for.

I still managed to get 14 towing another (4.0, 4x4) Ranger on a dolly across the state of Mi.

[Shran]

Originally Posted by AllanD

You've just re-convinced me I never want to own another 4cyl Ranger.

I have been in a state of disappointment and shock for the last two years. I got 25mpg out of my '86 with a 2.9, 5 speed and 3.45 gears. It is just so reliable though . . . . . .

Originally Posted by Captain Ledd

Something is wrong with your driving or your truck.

I agree, but I do not know what could be wrong. I have had a recurring cylinder 1 misfire occasionally, but it runs really good otherwise. I am leaning towards a partially dead or dying coil pack, bad oxygen sensor(s) or dirty MAF sensor. I have replaced the spark plugs. FWIW I am running 87 octane regular gas with no ethanol every time and I have been getting gas from the same station every time for over a year.

18.8 is slightly lower than usual, but there were a couple really windy days last week and that seems to affect my mileage a lot.

[Shran]

I cleaned the MAF tonight, just as a precaution. It appeared to be very clean but I guess we will find out. I am guessing that it will have zero effect on mileage. No results yet on the other truck we're trying this on.

[5speedin2.3]

Originally Posted by snoranger

Here the problem with your theory.

That is a 2 channel coil (wasted spark system). It fires #1 + #4 and #2 + #3 at the same time as pairs. That means when the #1 cyl is being fired on its exhaust stroke, #4 is being fired on its compression stroke. (ignoring the other coil, for now.) Switching 1 + 4 does nothing, except move which terminal, on the same channel of the coil, the wire attaches to.

With this 2 coil system, wasted spark system, you always have both plugs firing on both the comp and exh stroke. One is being fired on the main coil (on purpose), the other is being fired on the secondary coil (as wasted spark).

I was thinking the exact same thing.

[BRUTUS_T_HOG]

ignore this. waste of your time.

All this will accomplish is to change a good working waste spark system into.... a good working waste spark system.

[5speedin2.3]

[fastpakr]

Originally Posted by AllanD

You've just re-convinced me I never want to own another 4cyl Ranger.

Why you ask? well I average a combined mileage of 17.5mpg
and 19mpg highway and the best I've ever gotten is 22.1mpg, but I've played in the 20's on the highway...

in a 4x4 Supercab with a 4.0 running 4.10 gears.

So at what point would running a 4cyl gain me anything?

AD

I don't recall ever getting below 22mpg in my '94 Ranger. Not sure on combined average, but a typical tank is in the 24mpg range. Best is 27 on the highway.

[Shran]

Second tank down today (I drive a lot) which resulted in 20.1mpg combined, 90% highway. The other truck we tried this on got 21.7mpg (average for that truck.)

[Sunk]

I tried this a while back, and it didn't make a difference for me. If anything, it seemed like it was a little bit harder to start when warm.

I have similar issues as Shran too, with an occasional rough idle when cold due to a misfire on cyl #1, and average MPG around 17. I'm kicking myself for not buying a 4.0 4x4 truck, at least it' be somewhat capable.

[94 lngbd]

If any of you guy that are doubting this havent tried it then you dont have any say so. This morning before heading out to unload my truck of scrap metal & spend all day having gathered enough scrap to have 1300 lbs on the truck I did this plug wire swap.

I noticed much better power through all gears & im running 33" BFG KM2s with 4.10 gears. I was even able to actaully excellerate while on flat ground in fifth gear which I wasnt able to do before plug wire swap.

It feels as if my gears were swapped for 4.88s or someone installed 2 extra cylinders. which I know didnt happen

[00srad600]

On my 92 ford ranger 2.3 single cab short bed. Only mods were whole engine port heads lower intake upper intake and headers high comp pistons and a valve job a ram air and full header back 3 inch pipe till split to dual 2.5 out the rear. Running 3.83 rear with the MSD coils I got 40 mpg city and like high 50's on the high way and it was body dropped with 18 with low pros

[Shran]

Originally Posted by 00srad600

On my 92 ford ranger 2.3 single cab short bed. Only mods were whole engine port heads lower intake upper intake and headers high comp pistons and a valve job a ram air and full header back 3 inch pipe till split to dual 2.5 out the rear. Running 3.83 rear with the MSD coils I got 40 mpg city and like high 50's on the high way and it was body dropped with 18 with low pros