86 full size xlt 5.0 - Ford Bronco Forum
 
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post #1 of 8 (permalink) Old 12-05-2012, 01:09 PM Thread Starter
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Join Date: Dec 2012
Location: colorado springs,colorado
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Bronco Info: 1986 fullsize xlt 5.0
Exclamation 86 full size xlt 5.0

I just bought a 86 xlt fullsize 5.0. Here's my issue I have changed my tank fuel pump, both fuel filters, oil change, distributor, cleaned the injectors, re- timed, and ran a fuel pressure test. The only mod I have not done myself is put on roller rocker racing heads. Now the problem is it will drive for a good 30 min but when my thermostat gets to about 190 degrees or hotter it just wants to die. It will idle fine but when I accelerate she wants to die and starts to sputter like she is not getting gas and in some cases she just dies completely and I have to wait for her to cool down to start again. I want to know if this may be from the ignition module getting too hot since it is on the distributor and that gets wicked hot. Is there a way to move the module or get one that has a higher heat resentance or is there something else that could be wrong? I love this girl and want to get her running like a champ again so she can play in the mud please help me thank you!!
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post #2 of 8 (permalink) Old 12-05-2012, 01:25 PM
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Bronco Info: 1995 EB 351W, E40D
What was the last thing you did before this happened? Whya was all that other stuff changed, to resolve this issue?

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post #3 of 8 (permalink) Old 12-05-2012, 01:30 PM
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Bronco Info: 94 C150 prerunner 351/zf/maf. To many mods to list.
Here you go for relocating the tfi
Relocation of TFI

It's not custom if you bought it from a catalog!
Visit my build thread- http://www.fullsizebronco.com/forum/...d.php?t=211825
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post #4 of 8 (permalink) Old 12-05-2012, 02:31 PM Thread Starter
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Bronco Info: 1986 fullsize xlt 5.0
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Originally Posted by wdford View Post
What was the last thing you did before this happened? Whya was all that other stuff changed, to resolve this issue?
nothing i bought it and it had this problem and im trying to fix it
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post #5 of 8 (permalink) Old 12-06-2012, 01:08 PM
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Join Date: Jul 2012
Location: florida
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Bronco Info: 96 eb 351 auto
Check the fuel pressure when this happens if it drops it is the pump in the frame rail. if not it is probably the tfi module or the pick up in the dist.
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post #6 of 8 (permalink) Old 12-06-2012, 10:57 PM
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Bronco Info: 1985 F-150 4x4 - 351w, 33's
i had the same problem. turns out it was my icm all together was bad. take it off and see if the glue underneath is cracked or melting. thats 1 sign its bad. but only 30$
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post #7 of 8 (permalink) Old 12-07-2012, 03:01 AM
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Bronco Info: 1986 Bronco XLT 302 AOD mostly stock, Sixlitre tuneup, rebuilt BW 1345 Tcase
Also check fuel pressure when this happens. My 86 would run fine for about 15 to 30 minutes then die. Fuel pressure was fine cold but the regulator failed when warm. I agree with the other posts too.
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post #8 of 8 (permalink) Old 12-07-2012, 09:36 AM
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Bronco Info: 1990 EB FSB, MAF, 6.7L, E4OD, 4" Rancho, 4.56, 33" on 15x10 Alcoa's
For remote mounting of the Gray Distributor Mount Push Start TFI ICM, all you need is a remote mount heat sink with this sweet harness...

RJM Injection Technologies Remote TFI Harness



I also agree with checking the fuel pressure first. And, as always, check for Diagnostic Trouble Codes.
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