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Old 02-03-2006, 14:58   #1 (permalink)
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1985 5.0L bronco restart problem

Hello every one i have this problem with my 1985 bronco and i hope that someone can help. So it starts good when it's cold. Take it out, warm engine, sits in parking lot for a few minutes, and it will not start at first try but will after two or three tries. It has always started but i am afraid it wil eat the battery.
So here are some things i have done. I have replaced check valve that screws onto crossover tube on back of motor.because it was broken Checked all vaccum lines and repaired all, and verified proper routing. Cleand injectors.
I thaught it was vapor locking so i rapped fual lines that run up the back of motor. Also checked voltage of battery at crank up. (11.2v)

thanks rich
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Old 02-03-2006, 15:55   #2 (permalink)
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Re: 1985 5.0L bronco restart problem

yo, again!...lol

ok; here are today's top contenders!
In the near corner, we have the TFI Module! (& or the hall effect sensor in the distributor); an excerpt from a TFI Law Suit article:
"...A TFI module can fail on an intermittent basis when hot, then function again when the engine cools, without leaving a trace of physical evidence that the TFI module had failed.

Rather than bearing the expense of moving the TFI module to a cooler location away from the engine...Ford decided to employ a less costly solution: to leave the module on the distributor, but make it last long enough to function during the warranty period, thereby forcing consumers to bear the cost of post-warranty failures that Ford knew would continue to occur in large numbers. As a result, over 13 million replacement TFI modules (which are designed to last for the life of the vehicle without maintenance or repair) have been sold to consumers at a cost of nearly $2 billion..."
The following vehicles have distributor-mounted TFI modules
1984-90 Bronco (4.9L)
1984-91 Bronco (5.0L)
1984-85 & 1988-91 Bronco (5.8L)
source is http://www.autosafety.org/article.ph...=&did=362...if it's this you can be reimbursed!
---
more, TFI Testing:
http://www.niehoff.com/techtips/ford.html
http://www.broncoii.org/Tech%20Pages/eeciv/index.htm#TFI%20Module%20Resistance%20Test:%20(9)
TFI & Hall Effect Sensor Testing (for stangs, but similar) by P B at onr.com
...
in da other corner is the fuel pump... but it's over-weight, sloppy, and shoulda been a contender years ago; so how about a fuel press test at the fuel rail (schareder valve)
http://www.onr.com/user/pbooth/mustang/tfi.html
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Old 02-03-2006, 16:01   #3 (permalink)
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Re: 1985 5.0L bronco restart problem

Great info AGAIN from AL Thanks Sir yes Sir
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Old 02-03-2006, 16:02   #4 (permalink)
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Re: 1985 5.0L bronco restart problem

auto safety.org not working
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Old 02-03-2006, 16:12   #5 (permalink)
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Re: 1985 5.0L bronco restart problem

For the TFI Settlement:
http://www.tfisettlement.com/

"...In these related actions, the plaintiffs alleged that Ford knew, but concealed from the public and from government officials, information that its TFI-IV module-which is an ignition-system component that Ford installed on the distributors of class vehicles-had an inordinately high propensity for failure due to overheating. The plaintiffs alleged that TFI module failure is more likely to occur in conditions that cause the TFI module to become overheated, such as in hot weather and while the vehicle's engine is under load (such as while towing or while driving up a grade) or while idling for extended periods. The plaintiffs also alleged that TFI module failure frequently occurs on an intermittent basis; that is, the module will fail while hot, and then recover and continue functioning after it cools. In addition, the plaintiffs allege that if a TFI-IV module fails, the engine of the vehicle can stall suddenly and unexpectedly, even while traveling on the roadway, thereby creating an unreasonable risk to motor vehicle safety..."
-----
btw, did you check for Trouble Codes?
http://www.tomco-inc.com/Tech_Tips/ttt6.pdf
--------------------
and a third contender! (but I too, hate just replacing parts. - unless you've had iggie switch issues recently
"Question: 1993 Ford Bronco mileage: 105,000. Engine starts fine cold. When I restart it after warming it up, it just cranks and does not start no matter how long I turn the starter over. However, if I turn the key off after 1-2 seconds and retry, immediately the vehicle runs fine every time. Thanks

Answer: Your no-start problem may be one of two things. The first may be a faulty ignition switch and the second a bad fuel pump..."http://www.2carpros.com/forum/forum-8.html
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Old 02-03-2006, 16:13   #6 (permalink)
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Re: 1985 5.0L bronco restart problem

have to go now...good luck, will be back here Sat afternoon for a few.
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Old 02-03-2006, 16:20   #7 (permalink)
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Re: 1985 5.0L bronco restart problem

Is module located on distriburator or under. VIN # matches with settlement info
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Old 02-04-2006, 06:52   #8 (permalink)
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Re: 1985 5.0L bronco restart problem

http://www.supermotors.org/clubs/sup....php?id=249507

ok, read the Settlement info & get a new one now.
this person relocated the TFI ala later year revision (94-96 Bronco):
http://www.supermotors.org/clubs/sup...=22381#content
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