Another Ford Problem: Not my truck this time

Sam from WA · Feb 23, 2011

My landlord's 1990 Ford F150 with the 5.0L/302ci is running not so good now, its acting like the fuel pressure is not up to snuff. Just has no power at all, misfires. What is the fuel pressure supposed to be at the fuel rail on these? I found on the internet its supposed to be 55-62psi, but the replacement pumps are only like 44-46psi?

Gary from Muleshoe · Feb 23, 2011

My 1999 F150 V6 did the same thing till I put new plug wires on. Now it runs like a sewing machine again at 229,000 miles.

Sam from WA · Feb 23, 2011

Thats what makes me think its the fuel pump, he just had it tuned up at a shop last week, they did everything: engine oil, plugs, wires, cap, rotor, the whole shebang.

Wild Bill · Feb 23, 2011

I think I'd be checking that firing order then.

430WLPG · Feb 23, 2011

Son's 95 f 250 was acting similar and the fuel filter down on the frame was plugged

K.Daddy1 · Feb 23, 2011

I just finished working on a 93 with no power and would sometimes die at a stop light. Checked the fuel pressure but as soon as you turn the key off the pressure would drop quickly. Replaced the pressure regulator, problem fixed.

Sam from WA · Feb 23, 2011

All filters are new. Fleetguard LF3313 Engine oil filter, new fuel filter, all new plugs, wire, the whole deal. Firing order was one of the first things I checked, all is good there. Plug wires are routed as per TSB 94410

in-too-deep · Feb 23, 2011

Catalytic converter plugged?

Sam from WA · Feb 23, 2011

No cat. It was gutted several years ago when he put a flowmaster duals kit on.

Anonymous-0 · Feb 23, 2011

Most likely pressure regulator.

snuffy · Feb 24, 2011

on a ford the number 1-2-3-4 is on the right side 5-6-7-8 is on the left a lot of people get them mixed up

sdc eastern ia · Feb 24, 2011

I had that very same problem. It happened right out of the blue truck started to run like it was starving for fuel. Replaced filters,plugs, and all the usual stuff then took it to a mechanic who replaced the same stuff even after I told what I had done. He said it was blown up so I sold it for scrap price to a friend who promptly put in a rebuilt computer and the truck runs fine. 1990 year 150.

El Toro · Feb 24, 2011

The firing order on my old Mercury Cougar is this with the 302: Hal
PS: I would check that firing order.
1-5-4-2-6-3-7-8

jackinok · Feb 24, 2011

check for vacumn leaks.

Another Ford Problem: Not my truck this time

Sam from WA

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Gary from Muleshoe

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Sam from WA

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Wild Bill

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430WLPG

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K.Daddy1

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Sam from WA

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in-too-deep

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Sam from WA

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Anonymous-0

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snuffy

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sdc eastern ia

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El Toro

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jackinok

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