Hi.........first off I did look but didnt see nothing bout this..............if there is, I'm sorry.

I own a 1988 Ford Bronco II, 2.9 L, V-6 wit a 5 speed tranny

My problem is, on cool/cold days it will crank and run like a champ.............but as soon as the weather get to be over 95 degrees..................it lets me drive it any where from 5 to 20 miles from the place where i started at. It looses power and dies on me.................just gives me enough time to pull over off the road til it truly dies. then after a min i can crank it up but has no power to move at all. I have changed fuel-oil-air filters............did a whole tune up to it............got a new tfi, egr, iac, relays, added 2. grounds to body and motor.

If anyone knows more bout this, please help me out.............need my Bronco for hunting and work................Thank you

 

Welcome to the site.

Does the check engine light come on? Have you tried to pull codes?

 

Thank you.....no, the check engine light does not come on. have a code rader but it doesnt bring nothing up...................my dad drove it to Auto Zone once and they got a code for the fuel press regulator....................and i changed it out the same day he got the code

 

I'd probably next put a fuel pressure gauge on it and see if fuel delivery is working right when it stalls/won't start.

 

After it cools off, does it run OK till its hot again? Could be the TFI ignition modual failing under heat load.

 

yes............after 30 mins it wil cran and run. done changed it out twice

 

forgot to say also..................it sometimes take longer to cool off and crank...........were days where i had to wait til the next day to try and crank it.......................but when it did bust off, it had a miss to it. pulled all the plugs out and checked them.....................all were good

 

When it dies, it still cranks but will not fire up? Or it will not crank at all?

 

half and half..................if it fires up.............it wont do nothing when i put it in gear. then again it might just crank and do nothing more then just that

 

ok been checkin on other pages seein if i can find out more infos............on one page i seen this

"so after all this it was the 1" hose that connects the low psi pump to the sender. i dropped the tank and found the hose was split in two. $1.75 later and she is all better. "

its also for a 88 bronco 2 wit 2.9 l.......................does anyone think this could be my problem???? Any feed back is better then what i have going on now. Thank you all

 

Does your '88 have one fuel pump (a single high pressure pump in the tank), or does it have dual fuel pumps (a low pressure "lift" pump in the tank and a high pressure pump in line)? '88 was about the year Ford changed from the 2 pump set up to a single pump set up, so how applicable the other diagnosis might be could depend on whether your fuel system is the same as his or not.

In any case, I would still start with a quick fuel pressure test. A disconnected/broken fuel line inside the tank would cause the fuel pressure to be too low at the fuel rail. If you tested it and found normal fuel pressure, that would effectively eliminate the suggested possibility. If you tested it and found that the fuel pressure was too low, that would give cause to further inspect the fuel system to determine why the pressure is too low.

 

i have 2 pumps.......................one in tank and one on the frame. how do i check the fuel pressure out??

 

1) Get a fuel pressure gauge. you may be able to borrow one from a parts store like Autozone. They should also sell them (the one I bought cost ~$40. It seems that Harbor Freight has one for <$20)
2) Attach the fuel pressure gauge to the Schrader valve (looks like a tire stem) on the fuel rail.
3) Run pump/start engine and see what the pressure is (spec is 35 to 45 KOEO, 30-40 KOER).

It tends to be important to test the fuel pressure when the engine is acting up.

 

ill check wit my dad and see if he might have one..............if not ill see if he can pick one up for me.

Thank u Mr Shorty

 

Sounds like classic failing TFI module.