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Old 10-10-2011, 11:13 PM
rangerwheelinmike rangerwheelinmike is offline
5.0 ranger!!
Join Date: Jan 2010
Posts: 307
Default fuel pump problem???

I have the stock 3.0 fuel pump still in my truck with the 5.0 just last week it started to stall when idleing. I can keep it runing if i stay on the gas so today i did a fuel presure test and its at 50 psi when runing then when it starts runing ruff the presure starts to drop. it stalls when it gets to 20 psi then goes to 0 and wont restart. guage stays on 0 have to cycle the key 10-15 times then you can hear the pump go from high pitch buzz to the normal pumping sound when it does that presure goes back to 50 and will run for a little wile then do it all over the pump bad or is it something elce? i dont understand how if the pumps bad i can fether the gas and keep it runing i mean i could drive it all day on highway but if i was in stop and go traffic theres no way. any ideas? this isent my daily diver anymore so maby upgrade pump well im at it?
2000 ford ranger 5.0/4r70w/np208 gt40p heads, mustang T/B and injectors, true dual flowmaster 10s no cats, 4r70w auto with trans go aod hd 2 shift kit and full manual valve body. 4x4,locked 9in rear,locked coil dana 44 front with 4.10s , 8in lift springs, 3in bl. on 34/10.5s,or 38-15-15s 8000k hids, 7in flip out dvd player, 2 kicker 12s and 2400watt amp
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Old 12-26-2011, 05:29 PM
rangercobra 4.0l rangercobra 4.0l is offline
Ford Ranger Owner
Join Date: May 2009
Posts: 57
Default Re: fuel pump problem???

change the pump is damaged, the motor that you need a bigger 190lph would be ideal

Ford Ranger 4.0l 97 aut. BBK Supercharger
8# boost, 241HP @ 270TQ, Rush muffler ss, 3.73 FR and posi, BBK header,BBK TB, aeromotive FR 1:1, walbro fuel pump 255lph HP, sniper tuning, port/pulish, comp cam 422, wiseco piston, chassis tech 3/4
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