93 F150 Front Tank Problem
#1
93 F150 Front Tank Problem
Hi guys,
I apologize if someone has already asked this question, I searched and found similar things but not the exact problem I'm having.
Here's what's going on, it's a 93 with the 4.9 and when I try to start on the front tank, it cranks but won't turn over. I can hear the fuel pump come on before I start it. When I switch to the rear tank, it starts up fine.
I normally run off the front tank but noticed something after using the rear for a while. Before this problem, I would start on the front tank and the idle would drop a little and give a little sputter and then go right back to normal. I just assumed it was the engine, but now that I'm using the rear tank, I've noticed that it runs like new.
Any help is appreciated, thanks guys!
I apologize if someone has already asked this question, I searched and found similar things but not the exact problem I'm having.
Here's what's going on, it's a 93 with the 4.9 and when I try to start on the front tank, it cranks but won't turn over. I can hear the fuel pump come on before I start it. When I switch to the rear tank, it starts up fine.
I normally run off the front tank but noticed something after using the rear for a while. Before this problem, I would start on the front tank and the idle would drop a little and give a little sputter and then go right back to normal. I just assumed it was the engine, but now that I'm using the rear tank, I've noticed that it runs like new.
Any help is appreciated, thanks guys!
#5
Mark
iTrader: (1)
very common problem with the dual tanks...your front tank pump is going bad...
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BuddhaBoy182 (09-25-2013)
#6
November 2011 TOTM Winner
Like tech says it probably the pump. You can check volts at the connector for the pump itself. These systems are known for dropping volts along the way so you end up with less then what the pump needs to run efficiently.
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BuddhaBoy182 (09-25-2013)
#7
So I should just replace the front fuel pump? When I bought the truck, the owner gave me a fuel pump but I don't know if it's for the front or rear tank. Is there a number on it I could check?
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#8
November 2011 TOTM Winner
Check your volts at the pump, check your pressure at the rail. Knowledge of those 2 items will give you enough information to decide to drop the tank and replace the pump. Or, if you want, empty the tank, get a ratchett strap or 2 and drop the thing and make it happen. But were I you I would check volts first, these truck are notorious for dropping volts along the way.
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BuddhaBoy182 (09-27-2013)
#10
November 2011 TOTM Winner
Not a stupid question at all, no such thing as. Not easily... depends on if you can get you hand up in there and release the connector. If you can't then you could drop the tank with some ratchet straps just enough to get room to pull the connector. Or... you could just pull it all the way... do your volt checks... it the test comes up good, your golden, replace the pump. If not then we'll have to start troubleshooting forward to find the bad connection
Mine has a body lift so access is easy. The ones without are pretty tight.
The tank is fairly easy to drop as long as it has no fuel in it.
Mine has a body lift so access is easy. The ones without are pretty tight.
The tank is fairly easy to drop as long as it has no fuel in it.
Last edited by 5Rangers; 09-27-2013 at 09:55 PM.