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3414HDuval
USA
387 Posts |
 Posted - 06/03/2011 : 20:53:01
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So i put my injectors back in with all new o rings and intake gaskets..
started it up and did the same as before, when i tap peadl it cuts out for a sec,
so i followed these steps
http://www.explorerforum.com/forums/showthread.php?t=170334
after the step when i turn the key on to ON i get a little above 0 psi..
so is it a fuel pump?
and yes guys the guys on the ranger fourm havent answered in 2 days so i resorted to here! |
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ByronC
USA
1605 Posts |
Posted - 06/04/2011 : 07:18:00
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When you hook up your fuel pressure gauge, cycle the ignition key on for two seconds( do not crank the engine), off and back on for two seconds and repeat this several times until you see the max fuel pressure on your gauge.
If memory serves me correctly, with key on engine off, you should see 45 lbs. Engine running 35 lbs. You must see a 10 LB decrease in fuel pressure when the engine is running. (Vacuum Regulator on the fuel rail) If this vacuum line is pluged, and fuel pressure is at 45 lbs all the time, it will cause the ALS "Adaptive Learning Strategy" in the computer to get all wacked out.
Start the engine, drive the truck while monitoring the fuel pressure. I used to tape my gauge to the windshield so I could see it while driving. Drive it hard for a bit (WOT) Wide open throttle and see if the fuel pressure goes from 35 lbs to 45 lbs and holds at WOT. If it drops off at all, you have a fuel delivery problem. IE Pump, filter, fuel tank vent, etc..
One more question, how well does the engine Idle? Smooth? Have you unhooked your EGR valve and drove it? Sometimes the EGR will get slightly stuck open. This will effect idle quality and driving performance.
Last thing, always clear the memory of your computer (Disconnect the NEG Battery for 5 minutes) This wipes out the "ALS" and puts the computer back in a "new" state to start learning again. You must drive the vehicle at least 10 miles so the computer can relearn Idle stratigy...
Good luck.. |
Byron---Allis-Chalmers
The Few, The Proud, The Orange.
918H Agco-Allis, and a 928D Grasshopper Diesel.
D-21 Allis-Chalmers
Allis-Chalmers Tech for 7 years. |
Edited by - ByronC on 06/04/2011 07:34:15 |
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3414HDuval
USA
387 Posts |
Posted - 06/04/2011 : 09:56:17
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| yes it has trouble idling, ile check egr valve first before i assume it is a pump, it litterly has about 2 lbs when not running and none when running |
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3414HDuval
USA
387 Posts |
Posted - 06/04/2011 : 16:28:47
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| okay i changed the pump, still hasent done anything so a waste of 100$ on my stupidity, so what else could my problem be guys? my fuel pressure regulator? |
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Cvans
USA
4407 Posts |
Posted - 06/04/2011 : 16:39:02
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The fuel pressure regulator would be an excellent place to start. When the one went bad in my Pontiac it wouldn't idle well, started hard, and it had trouble accelerating as I recall.
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East Central South Dakota
The democracy will cease to exist when you take away from those who are willing to work and give to those who would not.
Thomas Jefferson
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ByronC
USA
1605 Posts |
Posted - 06/04/2011 : 17:31:34
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Are you using a guage that hooks to the Schrader Valve? Schrader Valve looks like a tire valve stim and is on the fuel rail.
Pull the vacuum line off the fuel pressure regulator. Crank the engine and see if gas comes out of the regulator vacuum nipple. If it does, replace the regulator. Otherwise, I don't know of a test to see if its also bypassing internally.
One other thing, some of the older Rangers had two fuel pumps. One on the frame and one in the tank. ALL had a pump in the tank.Duel pumps are as follows; tank is a low pressure pump, frame is the high pressure pump. If you only have one pump in the tank, its a high pressure pump. If you have two and replace the frame pump and the tank pump is also bad, NO FUEL PRESSURE!!!
Does yours have one on the frame rail? IF IT DOES, follow the fuel line back toward the tank and see if it has a black looking thing on the frame rail that looks like the bottom half will screw off. If it does, there should be a filter in it. If this black thing has a return line going back to the tank, it could be bypassing fuel.
EGR=
I have taken a coke can and cut a block off gasket to use between the egr and the manifold... For test purposes only.. :)
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Byron---Allis-Chalmers
The Few, The Proud, The Orange.
918H Agco-Allis, and a 928D Grasshopper Diesel.
D-21 Allis-Chalmers
Allis-Chalmers Tech for 7 years. |
Edited by - ByronC on 06/04/2011 17:36:35 |
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BRAD1975
Canada
1562 Posts |
Posted - 06/04/2011 : 22:12:33
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yes...the 88 model ranger with 2.9L v6 will have two pumps...one in tank (or each tank if it has aux rear) and one on the inside of the frame rail roughly placed below where the drivers feet would be
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3414HDuval
USA
387 Posts |
Posted - 06/05/2011 : 22:09:06
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yes it has 2 pumps and i replaced the one on the frame rail and it has fuel pressure,
and i took the vaccume line off the pressure regulator and it was not spitting out fuel.. but would start for about 3 sec and conk out,
could it still be the regulator? |
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Ford ranger fuel pressure
