truck won't start, need help.

dieselboy · 06-13-2008, 02:38 AM

I have a 94 SS vin "w" with some problem I can't diagnose. I have replaced the Distributer, Coil, Wires, Fuel filter, and Fuel pump(trust me when I say it needed replacing). I have verified spark and fuel pressure, yet the truck will not fire up. Any suggestions?

ssz28man · 06-13-2008, 09:31 AM

what's the fuel pressure at? how long after you let off the key does it hold pressure?

dieselboy · 06-13-2008, 02:50 PM

Id estimate it's at 30psi. It'll hold pressure for a few minutes

ssz28man · 06-13-2008, 08:51 PM

there's your problem, should be 55 to 61 psi and won't try to start below 50 psi why did you replace the old pump? rust or lack of psi? what brand pump did you use?

Rhotpursuit · 06-13-2008, 09:05 PM

Quote: Originally Posted by ssz28man

there's your problem, should be 55 to 61 psi and won't try to start below 50 psi why did you replace the old pump? rust or lack of psi? what brand pump did you use?

If his system is mfi the pressure should be41-47 psi key on not running with a decrease of 3-10 psi when running at idle

Edit...disregard..

06-13-2008, 02:38 AM	#1
dieselboy Registered User Join Date: May 2006 Posts: 7 Location: User is: OffLine	truck won't start, need help. I have a 94 SS vin "w" with some problem I can't diagnose. I have replaced the Distributer, Coil, Wires, Fuel filter, and Fuel pump(trust me when I say it needed replacing). I have verified spark and fuel pressure, yet the truck will not fire up. Any suggestions?
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06-13-2008, 09:31 AM	#2
ssz28man Registered User Age: 27 Join Date: Feb 2008 Posts: 262 Location: durham, nc User is: Online	Re: truck won't start, need help. what's the fuel pressure at? how long after you let off the key does it hold pressure?
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06-13-2008, 02:50 PM	#3
dieselboy Registered User Join Date: May 2006 Posts: 7 Location: User is: OffLine	Re: truck won't start, need help. Id estimate it's at 30psi. It'll hold pressure for a few minutes
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06-13-2008, 08:51 PM	#4
ssz28man Registered User Age: 27 Join Date: Feb 2008 Posts: 262 Location: durham, nc User is: Online	Re: truck won't start, need help. there's your problem, should be 55 to 61 psi and won't try to start below 50 psi why did you replace the old pump? rust or lack of psi? what brand pump did you use? Last edited by ssz28man : 06-13-2008 at 08:52 PM.
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06-13-2008, 09:05 PM	#5
Rhotpursuit Ticket Magnet Join Date: Sep 2003 Posts: 3,324 Location: Spanaway, Wa User is: OffLine	Re: truck won't start, need help. Quote: Originally Posted by ssz28man there's your problem, should be 55 to 61 psi and won't try to start below 50 psi why did you replace the old pump? rust or lack of psi? what brand pump did you use? If his system is mfi the pressure should be41-47 psi key on not running with a decrease of 3-10 psi when running at idle Edit...disregard.. Last edited by Rhotpursuit : 06-13-2008 at 09:06 PM.
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