My f 150 4.9 inline 6 after I drive it for about 30 min or so and it gets hot.When i turn it off to go in a store and come right back out (5 min tops) it wont start,it will turn over and try to start but wont catch.If I let it cool off with the hood up for about 15 to 20 min it will start if i hold the petal to the floor and pump it too.I have not replaced anything yet,just need to know witch way to go.any help yall can give me will be great.
Thanks,
James T.

I'm not real sure just yet but it may be flooded with the description. That might be a lot of extra fuel for whatever reason right now that could be flooding into the oil as well so I suggest checking oil at once to see if overfull or smells of oil.

Foot to floor trick is generally effective to clear a flooded engine but it should be flooded - not sure as said so far,

T
_________________________________________


Tom Greenleaf - MetroWest, Boston
http://acsource.net/acforum/index.php

Thanks for the reply Tom,can you flood a EFI motor? The problem only happens when it gets in to the 70s and hotter.it started at the end of the summer last year,a maintance guy at work said he thought it was the Ignition coil that was getting hot.It is mounted on the motor right at the head and I have also seen someone say the starter might be getting hot.But the starter turns over when it does this,Nether part is cheap and money is tight.I did not have any problems with it this winter. Thanks again.
James T.

Hope others are watching as I'm not so sure as said already with this one.

Yes - fuel injected engines can get flooded. Either injectors leak down liquid and can pollute the oil too (that was my concern) OR the engine always thinks it's cold and makes adjustment for a colder engine not unlike a choke would. The source of info for computer for that is the CTS or ETS = Coolant Temp Sensor or Engine Temp Sensor and will tell injection to overfuel which would be normal for a very cold engine and would behave.

You said the foot to floor seemed to work so that all came to mind.

Yes again on the coil(s) - they can be temp sensitive.

When it doesn't start is when you can gather some more info. Have a spark tester with you or test for spark your way, AND have some starting fluid you can spray into throttle body which would react if the issue was LACK of fuel. Would be nice to narrow it down.

If you notice when it does start that black smoke or typical flooded behavior is noticed than say so.

Get a code reading now even if "service engine soon" light isn't on. It may have some preliminary info to help. If light is staying on then it does have pertinant info but don't go nuts till you know what it has to say. Vehicle's computer does NOT tell you which part to replace but rather which is not reading properly.

See what you can find with the spark vs fuel too much or lack of,

T
_________________________________________


Tom Greenleaf - MetroWest, Boston
http://acsource.net/acforum/index.php

Thanks for the info,I will let yall know what I find out.
James T.

Same problem with my 96 F -150. Starts fine if the truck is sitting(cold start). If I run truck then turn off It will not restart hot. I've replaced spark plugs, wires, distributor cover...same problem. Im being told to replace the gas filter which has never been replaced.

A leaking injector is the most common thing to act like that. You can determine if you have one by using a fuel pressure gauge and watching the rest pressure when you shut it off. If the pressure drops right away, try pinching off the feed line before the gauge and the return line to see if either makes a difference. If it still leaks down with both lines pinched off, it's likely a bad injector. Also pull the vacuum line off the regulator and make sure there is no fuel in it.




78 Corvette Pace Car For Sale-18k mi orig-Florida

Mike - just a comment on the gas filter! Seriously consider replacing that every year! The fuel we are getting frequently has that alcohol in it which suspends dirt and gas stations are really not filtering fuel you buy either.

Don't know Ford trucks real well but Fords frequently put the filter down on frame use a cover and break off clips to put a new one in. New filters come with new clips if that style,

T
_________________________________________


Tom Greenleaf - MetroWest, Boston
http://acsource.net/acforum/index.php