I have a 96 Bronco with 5.8 When cold, it starts and runs great. After reaching normal operating temperature, it still runs great until I shut it off and let it sit for a bit. Like going into a store. Then trying to restart, it acts like it is trying to run on a couple of cylinders. Sometimes after chucking along in this state for 10 seconds or so it will either die or catch and run normal. If it catches, it runs great again. If it dies, usually it will not start again until the engine has set and cooled for about half hour. No codes are being set. I've replaced all ignition parts, and after some internet searches, the fuel pressure regulator. Thanks for any help
All ign parts including pickup inside dist??? My '96 F-150 & a friend's '94 Bronco(both 5.0) had similar issues at end of last year... I repl dist just because I didn't want to mess with pickup & Ken did same(been there done it a couple times before, have enough T-Shirts)... So in approx three months no more issues... If fuel filter was plugged till it wasn't getting enough fuel to start, it wouldn't have enough power to pull itself out of driveway... If fuel pressure issue is suspected it's easy enough to connect a gauge to fuel rail...
LOL, that's a non existent problem with pump in tank... We ain't talking about a '51 Ford flathead with FP on top of engine... Yes gave lots of issues with module on dist, but these use a module mounted on a fenderwell heatsink, rarely have issues... My friend ran out and got one for his Bronco and it started, he was elated till it did same thing next day... I keep a spare module already mounted on heatsink in my F-150, didn't help when mine wouldn't start...
Have you replaced the distributor? The bushings in them wear out and cause issues with the pick up in them. But I'd check fuel pressure first.
Thats what it turned out to be. Bought a fuel pressure gauge and key on, engine off, pressure was 15psi when cold and 7psi when hot. Had to do some major rust repair on the tank frame mount and skid plate. The tank its self wasn't leaking but the locking ring and tabs just crumbled when trying to remove it. So new tank and pump gives me 42psi hot or cold with key on and engine off.
Dont know how true it is but I have been told to not run the tank low on a vehicle that has an in tank pump because it allows them to heat up and shorten their life time
I would have to doubt that because seeing how they are built you would have to keep the tank at least 3/4 full all the time to keep the pump fully submerged.
That probably has some small degree of truth, BUT the pump is cooled by the fuel its pumping and without pressure shuts down(when 'puter looses ignition pulses)... Also Ford's before earlish '00s are a return system, meaning most of the fuel pumped is fed back to tank and that fuel is dumped onto the pump... My old '96 F-150 with 190K mi has a bad gauge sender in front tank, I run it till it starts loosing power due to low fuel then switch to rear tank... Had it 4½ years and no doubt previous owner was doing same, as I was told about gauge... Front tank was dry when I bought it...
