Ignition Coil Question

[Kimbrough]

There is a small metal cylinder attached to the ignition coil. It has one wire coming out of it. The wire is broken off at the cylinder on my '88 Grand Wagoneer.
What is it and what does it do?

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74 Wagoneer (for sale)
360 v8
TH400 w/low range
dual exhaust
Marvin the Martian floor mats.

'88 Grand Wagoneer
4inch lift
31x10.5 mud tires
http://cwm.ragesofsanity.com/contrib/blackeye/hippy.gif

[Michael F]

It is a radio interference condenser (capacitor). Used to cut down intrerference noise from the ignition.

You may not need it.

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81 Cherokee Laredo WT
56,000 orig. miles (not the engine I6 to V8 conv.)
360/727/208/3.31w/tracklock/35x12.5 ProCompMT/double diaphragm brake booster
4" BDS lift/TrailMaster SSV shocks
79 Cherokee Chief WT (snow plow)
360/400/QTw/LR/3.54/31x10.5

[Jowersgd]

Mine is cut too. Apparantly it is not something vital. Mine was cut on purpose because it caused a hesitation problem when hard accelerating. Somehow it was interfering with the coil charge. Cut that little wire and everything was fine.

[ChrisCollege]

Mine on the 88GW is broken as well no problems to date. I am currently working on the TFI conversion and was wondering were I would put the radio interference capacitor in the new system? Would I just take a wire of the positive of the new TFI coil and into the capacitor. I did grab a new capacitor from a TFI ford when I grabed the TFI coil bracket. Any thoughts on whether to put it in the new sytem and where to?

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88 GW
93 YJ

[fas2c]

Take a look at irbob's web site. He ahs some Great pics to show how he modified his coil bracket and installed the radio interference thinggy http://fsjeep.homestead.com/TFI_Upgade.html

good luck,
fas2c


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The Big Orange
1974 Wagoneer
360-THM 400w/QT
31-10.5's
Super Saggy Springs
135,000 miles
Soon to have:
Performer Intake w/4bbl carb & low range QT gears

[nograin]

Yes its a noise reducer. Helps cut down on static to radio, and other electronic contraptions (like ignition boxes).

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360 727auto-trany, NP229
body by beer (PO) :(
carries wood inside
no "wood" outside
http://users.erols.com/mathewg/85gwsmll.jpg
My other car is a fish

[ChrisCollege]

Does the noise surpresor go to the negative or postive side of the coil? The article refrenced says negative but I would guess it is the positive side. Any help?

Thanks in advance

Chris

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88 GW
93 YJ

[David Simon]

When I did the upgrade on my 88 I had two yellow wires on the positive side and one green/white wire on the negative side of the stock coil. One of the yellow wires went to the condenser. I used a Ford connector from the parts yard that had the same two and one setup, easy to find, and used one to connect the condenser. I haven't had any problems with it. Good luck.
David

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98 Cherokee (wife's)
97 TJ with all the goodies
88 GW
NP229/TF727/D44s
TFI Upgrade
Free-flow cat, Flowmaster 70, 2 1/2" exhaust

[ChrisCollege]

David,
Thanks for the post. I thought it was the positive side. Also I am from Tampa and my wife Jennifer is from Lakeland. Her father Charles works at Owneby auto in Lakeland and has a 89GW.
take care.

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Chris
88 GW
93 YJ
In the process of TFI upgrade

[irbob]

Woowa there.......my stock setup was on the neg side and the TFI plug I got had two wires out the neg side also. What's going on here? I slso asked someone else here about this and he said it goes on the neg side. Hmmmmmmm

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My FSJeep Site (http://fsjeep.homestead.com) <----Click one of these----> IFSJA Sticker (http://fsjeep.homestead.com/stickerpage.html)
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"Mystery Machine",360,K&N,TFI,Custom Turbo II 2.5" Exaust,999 Auto,NP229,F/Dana 44F,R/AMC 8 7/8",32X11.5 Cooper Wildcat MT's,RS 9000's,AALx4,2" blocks,3" Body Lift.

[nograin]

Just checked the shop manual and diagrams for ya. Noise suppressor is on the positive side. Wire should be a plug in, no need to clip or splice (with the OEM coil harness). on the harness side of the plug the wire is a red w/ trace, like the input positive wire. The trigger wire (neg) was supposed to be green. Remember, the negative isn't really a negative in the normal sense of a circuit, but a trigger signal to the ECU to fire the spark.

[David Simon]

Bob, I went and found my old canister coil and it still has the plug on the top of it. Two yellow on the positive side, one to the condenser and one green/white on the negative side. The colors may be different because we have different years.
But, to your point, the F*rd TFI coil I got from the parts yard had two wires on the negative side, one attached to the condenser and one on the positve side. I swapped them to fit my application.
So, scientifically , which side of the loop is the best for a condenser?

Chris, I think I met your father-in-law last time I was at Owenby, grey hair, sixtyish sound right?. I got an EGR valve and when I told him what is was for he said he had a GW also. We talked about Jeeps and what fun they are to work on http://www.ifsja.org/ubb/wink.gif for a few minutes and I left. I had Cory in the machine shop rebuild the heads while I was doing my rebuild last month. They do good work there. If you come down this way let me know, we'll hit some trails.
David

[ChrisCollege]

David,

That is Charles. And they do great work at Owenby. One of those places that think about what you are asking for before they give it to you to make sure your satisfied.

Chris

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Chris
88 GW
93 YJ
In the process of TFI upgrade

[David Simon]

I wish there were more places like that. I have never had to return anything there. I was impressed with the machine shop. When I dropped the heads off they asked everything about the Jeep before I left. It's all together now and runs great.
I think the best way to find the good shops is to go to the old mechanics around town and ask who they use.
David