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  #1  
Old 02-25-2012, 07:25 PM
mikewurtz mikewurtz is offline
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Default Fuel Pump? Maybe? Maybe not? grrrrrrr

I'll make this as short and sweet as possible. Quick side note, if you frequent other Ranger forums, I did in fact post this in multiple forums (trying to cultivate as much collective info as possible).

I have a 1999 2WD 4 cylinder Ranger. When I tried to start it one day, it fired right up and immediately died. I restarted it and revved the accelerator, it ran as long as I pushed the gas, but immediately died when I stopped. Several starting attempts, same result every time - perfect start, will not idle at all.

I did my research and most forums and articles contained the same possible diagnosis . . . fuel filter, IAC, or MAF. So I decided to start with the cheapest option, the fuel filter.

After I bought the part (and the stupid disconnect tool that ended up not fitting ) I crossed my fingers and hoped that it had magically repaired itself and tried starting it . . . no luck. So I disconnected the fuel inertia switch. I started it up to relieve the fuel pressure, and . . . it actually ran for a few seconds.

What could that mean? Why would it try to idle with the fuel inertia switch disconnected but immediately die when it is connected? Is my fuel pump bad? Is it an air flow problem? Thoughts . . . .
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Old 02-25-2012, 08:11 PM
FireRanger FireRanger is offline
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Default Re: Fuel Pump? Maybe? Maybe not? grrrrrrr

Well that makes no sense. Stumped.
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  #3  
Old 02-26-2012, 08:02 AM
bmwrich bmwrich is offline
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Default Re: Fuel Pump? Maybe? Maybe not? grrrrrrr

What ever residual fuel was left in the system after the switch was removed/turned off.

Can you hear the fuel pump energize??
With the line disconnected,it should flow fuel with the key on.
A Scan will tell if any sensors are foul...

Last edited by bmwrich; 02-26-2012 at 08:06 AM.
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Old 02-26-2012, 11:54 AM
tomboy tomboy is offline
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Default Re: Fuel Pump? Maybe? Maybe not? grrrrrrr

Thursday my 93 3.0 acted the same way, took an engine to the machine shop, truck ran like a top over there, about 45 miles. Went to leave, it started right up but sounded different, and wouldn't idle. Died and would only fire and then quit, hauled it back to the shop, split the fuel line at the rail, key on, no gas. Pulled the filter, it was needing changed, key on just a very small squirt of qas from the pump. Replaced the pump and filter, fired right up, drove it 150 miles this morning, runs great.
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Old 02-26-2012, 02:43 PM
bmwrich bmwrich is offline
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Default Re: Fuel Pump? Maybe? Maybe not? grrrrrrr

Quote:
Originally Posted by tomboy View Post
Thursday my 93 3.0 acted the same way, took an engine to the machine shop, truck ran like a top over there, about 45 miles. Went to leave, it started right up but sounded different, and wouldn't idle. Died and would only fire and then quit, hauled it back to the shop, split the fuel line at the rail, key on, no gas. Pulled the filter, it was needing changed, key on just a very small squirt of qas from the pump. Replaced the pump and filter, fired right up, drove it 150 miles this morning, runs great.
Eggs'zalent!!!
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