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2.5L iginiton question

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Old Aug 19, 2006 | 10:02 AM
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mfriesen's Avatar
mfriesen
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2.5L iginiton question

Does anyone know if the EDIS system on the 2.5L (1998) work like the 3.0 and 4.0's that use reverse polarity? I want to change plugs and would like to know if I need to spend the extra on the double platinums.
 
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Old Aug 19, 2006 | 10:59 AM
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Smile

Yes. Ford DIS & EDIS uses the "waste spark" system in most engines. The Ford Lima engines, 2.3L and 2.5 OHC have two plugs per cylinder, where the others have a single plug per cylinder. jd
 
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Old Aug 19, 2006 | 11:00 AM
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From: Durant, OK (SOSU)
I'd think so.

Use Motorcraft or Autolite plugs, nothing else, and use only those reccommended in your owner's manual.
 
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Old Aug 19, 2006 | 11:38 AM
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I think I will spend the extra and money and get the double platinum plugs. After looking were they are located, I won't want to do this for a long time, and with double platinums I shouldn't. I pulled one plug to see what they looked like and I tore the boot off the wire just getting it off. So time for new wires also. At 124K it is probably time for that any way.
 
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Old Aug 20, 2006 | 12:32 AM
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Funny thing.....I am doing this same thing now on a '98 2.5.

Yes on Moto platniun, I have had good luck (100K). I am taking out some Bosch with 50k on them, not so good.

The real funny part is mine has aprox 225k on it with orig wires (they are dated, 1998).
I thought this time I would do the wires too, I checked the resistance on them and the OLD wires have less resistance than the NEW Motocraft wires???
Go figure.

.
 
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Old Aug 20, 2006 | 12:47 AM
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Well changing plugs on the driver's side is a real pain. All together I ended up having 5 wires pull out of the boots. The plugs that I replace were Autolite Platinum. I checked the gap on a few .052-.059. While I was dirty and struggling with hard to reach parts I replaced the PCV valve. Also cleaned MAF sensor, and changed the fuel filter.

Truck runs good, I had noticed that when taking off or on some shifts I heard pinging, now that is gone. Now I just need to figure out the clunking noise from the front end.
 
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