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93 Ranger 3.0 Stalling/starting issues


dw8

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My father called me a couple weeks ago saying his Ranger quit running. He said it just kept losing power and then finally died. When I got the chance to try and diagnose the truck later in the day, it would start and run. But would not run for long and then stall. If you gave it gas, it would choke out and stall. I immediately assumed it was the fuel pump. Because I had just replaced it 6 months prior. So I swapped the pump out and it started up and then died. But it would immediately fire right up. You could do this several times before it would not start at all. So I began thinking it was the ignition module. We swapped it out yesterday and the truck would not start at all. Put the old module back in and it would not start either. So I put ether in the intake. It attempted to fire. Put a little more in and it popped (backfired) out the intake. At that point we just kept trying to start it without the ether. It finally started, but ran for only a couple seconds. The popping made me think it jumped time. I read on this forum about distributor gears wearing out and then jumping time. And also thinking it might be the MAF.

Now a little background on the truck.
-1993 Ranger, 3.0 automatic.
-95,000 miles
-New fuel pump, fuel filter, plugs/wires

Any thoughts?
 


dw8

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Updates: Replaced MAF, didn't make a change.
 

dw8

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I am planning on checking the fuel pressure. But the pump is new. And has literally no miles on it. Just put it in a couple weeks ago. I originally thought it was the reason the truck stopped running.
 

01b3000ds

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dw8

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Just want to eliminate fuel restriction. You'll need to watch how fast pressure builds.

Fuel filter?
Changed the fuel filter one week prior to the pump.

Maybe this will help:
http://www.therangerstation.com/forums/showthread.php?t=159836

here's how to check:
http://www.explorerforum.com/forums/showthread.php?t=263699
2nd last paragraph tells us Fuel system and TPS and DPFE are connected...
...and don't forget to re-cal the IAC if you replace TPS.

(same thing happened to me last week, and I replaced my fuel pump a couple weeks before that)
Will definitely be looking into this. Thanks for the tip. :icon_thumby:
 

dw8

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Update. TPS tests fine. Still have to check the fuel pressure.
 

dw8

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Update #2. Called in local mechanic. Fuel pressure is fine. He tapped the relays and it started. Purchased 2 new relays. Truck started again and was running fine. Then it started missing died. Now it won't start at all. Well, it immediately fires, but won't stay running.

Called the mechanic back. Said the wiring in the fusebox might be messed up. And also said the starter switch might be acting up.
 
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