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post #1 of (permalink) Old 01-06-2005, 10:05 AM
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Hard starting

I have a '90 model Bronco with a 351W. After it sits for 4 or 5 hours it is hard to start back up again. It is not getting any gas, if I use some starting fluid it start for a second until the starting fluid is gone then it will die again. After I get is started it has no problem getting gas and if I kill it it will start up again with no problems. Anyone have an idea? I don't know much about fuel injection systems.
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post #2 of (permalink) Old 01-06-2005, 01:50 PM
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Re: Hard starting

My knowledge is not great either, but I dealt with an oldsmobile like this in my high school auto shop. It was the same way it wouldnt start without some help (carb cleaner) and after running off carb cleaner for a while it would fire. Our teacher told is it was probably a bad fuel pressure regulator, or that there was a leak somewhere else in the line causing the system to loose pressure after each use. Normally fuel systems stay pressurized. I know the fuel pressure regulators on these trucks are the topic of much discussion. So maybe you could start there? Good luck.
post #3 of (permalink) Old 01-06-2005, 09:15 PM
curtcon
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Re: Hard starting

before you start it next time try turning the key back and forth a few times to let it pressurize and they try to start if that works I would say its a leak. I dont know if its the same as my truck but check the vacume hose that goes to the fuel pressure regulator after it has been running, if it lets gas out the regulator is most likly bad.
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post #4 of (permalink) Old 01-07-2005, 12:44 AM
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Re: Hard starting

I have tried turning the key back and forth, but I can't tell that it makes any difference. I'll take a look at the fuel pressure regulator tomarrow if I have time.
post #5 of (permalink) Old 01-07-2005, 03:59 AM
 
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Re: Hard starting

A guy i know's efi 302 had this same problem and turned out to be a bad fuel filter and also a bad plug on the fuel pump making a bad connection.
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post #6 of (permalink) Old 01-08-2005, 10:44 AM
BroncoWar
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Re: Hard starting

I believe i had the same problem, but when ever i got it started and drove it for a while it was hard to start back up, this may be what you encounter, if so its probably your alternator not giving the battery enough juice back.
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