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11-16-2005, 09:58 PM
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TFI ignition upgrade
Jeep 258 TFI ignition upgrade - Using stock Ford parts, you can upgrade the ignition in your Jeep, allowing much better performance, gas milage, and...
Last edited by TerryMason; 04-01-2008 at 05:19 PM.. 
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By
TeamRush
on
01-16-2009, 03:22 AM
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Re: TFI ignition upgrade
Quote:
Cap Adapter, Distributor Cap, Rotor... OR, MSD p/n 8414 gives it all to you at once, and uses a premium cap... MSD Ignition 8414 - MSD Cap-A-Dapts - summitracing.com  |
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By
Bigf350sd
on
02-21-2009, 04:25 PM
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Re: TFI ignition upgrade
Well, I would like some feedback here on this if I can get some. I unboxed my HEI "clone" cheap Dragon Fire distributor today and proceeded to check it out, gear hardness, length, cap for brass terminals and flaking electrode, etc...and found out a couple of things. First off, the gear was hardened, a drill bit wouldn't even scratch it, BUT...I had read that a factory gear wouldn't work on aftermarket distributors, but I got out the calipers, checked shaft diameters, and proceeded to remove the factory gear from my old points style distributor, and install it on the new HEI, and it fit like it was made for it! It was ever so slightly tight, took a couple of small taps to get it on, put in the new pin...PERFECT! Any ideas why this won't work? Second, I installed the dizzy in the 360 WITHOUT a gasket, after visually inspecting the length, and it appeared to seat fully into the engine, I couldn't get a small flat head screwdriver tip under it, and then I had up and down play in the shaft, somewhere in the range of 1/16 to 1/8 inch, so it was not tight against the pump, so again...I'm thinking PERFECT. Next, I moved to the cap itself, popped it off, brass terminals inside and out, and I couldn't even scratch the center electrode with a screwdriver, much less my fingernail, and the cap is RED in color, not black, so I think I'm good there also. The only thing I didn't get around to, was removing the module and checking for heat sink paste instead of dielectric grease, and running in the longer screw and grounding it externally. Once I get those 2 things checked/done, I think/HOPE I'm gonna be good on this thing, and dodged the bullet. Again, any ideas why the factory gear that fit seemingly perfect, (with the dimple on the rotor tip side) will not work? Please, if anyone has any ideas on the gear or any other thing I mentioned, or anything I forgot to mention, please, let me know! I don't want to risk hurting the engine with this thing.
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By
TeamRush
on
02-23-2009, 09:51 AM
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Re: TFI ignition upgrade
Well, I actually answered your questions on one of the other forums you posted on...
For the rest of the readers, The early Delco breaker points distributor use the same size shaft as the later Delco HEI distributors, SO, As I've stated so many times before, The Delco I-6 and V-8 Breaker Points distirbutor gears WILL FIT an GM HEI. The fact that it fit your 'Dragon Fire' version is a fluke since many of the HEI Clones have under, or over sized shafts. ------------------------------ As we have established before, The AMC Jeep/Motorcraft V-8 Gear will fit a GM HEI shaft also... When this was just a 'Junk Yard' upgrade, many people just used the V-8 gear on the GM HEI distributor for the I-6 engines and it worked fine... The ONLY gears that won't interchange with a GM/Delco HEI distributor with standard shaft is the AMC Jeep/Motorcraft I-6 Gears. An AMC factory I-6 gear from '78 to '86 WILL NOT transfer directly onto a GM HEI distributor. |
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By
83CJ7258greatshape
on
03-05-2009, 02:03 PM
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Re: TFI ignition upgrade
Terry,
Performed this upgrade on my 83 CJ7. WOW!!! Cannot believe the performance before and after. Never would have suspected I had an ignition problem. Had a rolling kind of idle at best along with the stalls, lousy acceleration, the hesitation, etc.. Just never wiould have suspected the ignition. I take my hat off to teamrush and you for posting. Keep up the good work. Tom |
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By
azjpiper151
on
04-13-2009, 01:23 AM
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Re: TFI ignition upgrade
Did this to my jeep and mad a great change. I still can not get the darn thing to rev over 3.5k. and is quite boggy and not as responsive as I would like. Any suggestions??
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By
83CJ7258greatshape
on
04-14-2009, 01:37 PM
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Re: TFI ignition upgrade
To the "won't rev over 3.5k" owner. Wouldn't be surprised if you had a crankcase ventilation problem.
Recommend switching the PCV valve to a "Breather cap / PCV valve" It's a breather cap (with wire mesh in cap) plus a pcv valve. Available at Autozone. Fits right on the ol' 258. Mine works great. Hope this helps. |
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By
azjpiper151
on
04-15-2009, 12:16 AM
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Re: TFI ignition upgrade
Re: TFI ignition upgrade
To the "won't rev over 3.5k" owner. Wouldn't be surprised if you had a crankcase ventilation problem. Recommend switching the PCV valve to a "Breather cap / PCV valve" It's a breather cap (with wire mesh in cap) plus a pcv valve. Available at Autozone. Fits right on the ol' 258. Mine works great. Hope this helps. So this should go it the top front of the valve cover or the back? Really a Breather problem... Would have never thought it.. I will let ya know tomorrow! JP |
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By
83CJ7258greatshape
on
04-15-2009, 10:33 AM
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Re: TFI ignition upgrade
To azipiper151 - The new breather cap should go on top front of valve cover. Question - do you have oil in air cleaner? If so, definitely switch to the combo breather/pcv cap. I did and have no regrets.
To kidcj82 - I would check to see if coil is getting 12 volts when ignition is in "start". This will take two people. Not sure on specifics, but generally, coil should recieve MAX VOLTAGE when ignition is is "start' as compared to when it is in "run". "Run" involves ballast resistor (or some form of ballast resistor) that extends life of coil. Reason coil receives MAX VOLTAGE in start is to give engine best possible enviroment to start. Hope this helps Tom |
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By
defmornahan
on
06-17-2009, 08:11 AM
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Re: TFI ignition upgrade
Quote:
Do you mean something like this? O'Reilly Auto Parts - Results for Shopping Search I might, maybe, have a similar problem, and I know the PCV valve on my 258 is getting old. |
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By
83CJ7258greatshape
on
06-18-2009, 10:17 AM
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Re: TFI ignition upgrade
That's the part!
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By
iraq_vet_x2
on
07-10-2009, 07:19 PM
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Re: TFI ignition upgrade
Terry, Finally did the upgrade and it's great. Thanks a lot for the detailed directions.
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By
defmornahan
on
07-15-2009, 08:10 PM
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Re: TFI ignition upgrade
Quote:
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By
iraq_vet_x2
on
07-29-2009, 10:37 PM
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Re: TFI ignition upgrade
Terry, I did the upgrade with the E92 coil about a two months ago in my 89 4.2 and its been running great until today. The Jeep died on me while I was on my way back from work. A co-worker and I pulled it back home and I took the multimeter to it. Zero Volts at the pigtail wires with the key off, then 11ish volts with the key on and cranking. I also put my timing light on the wire from the coil to the distro and got no flashes.
Gotta be a bad coil already right? I put the old coil back on there with the new cap, rotor, wires and plugs gapped at 45 and that didn't work either. Should the old coil have made those plugs fire, or was the gap to much for it to overcome? Also, is 11ish volts enough to run the coil? |
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Last edited by iraq_vet_x2; 07-29-2009 at 10:46 PM..
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By
iraq_vet_x2
on
08-03-2009, 06:20 PM
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Re: TFI ignition upgrade
All better now. Replaced the Ignition Module and she's alive again.
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