91 D250 Gas Wont start - crank/no start
Thread Starter
Joined: Apr 2007
Posts: 1
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91 D250 Gas Wont start - crank/no start
Thank you in advance for advice & reading...
I have a ’91 D250 with the 360-gas engine. I am experiencing a very intermittent crank/no start condition. . I have been suffering thru this for the past 6 months or so. I touch or jiggle wires, stuff works sometimes. Months go by, it pops up again unexpectedly and the same touch/jiggle doesn’t work.
First time I ran into the issue, I found the ‘hose clamp’ that holds the fuel pump in the tank broken and the pump was sitting up, unseated. I replaced the clamp, put some dry gas in a fresh tank of gas and all seemed well.
Few months go by, truck dies while driving. Get it towed home, nothing is obviously wrong. I shake the fuel pump wires once and turn the key on – hear the fuel pump working, and the truck fires right up.
It seems that the fuel pump is not getting juice when the key is on or cranking may cause the condition. I have service manuals and have voltage at the relay under the hood, and connector at the pump.
I have inspected the fuel-pump connector that goes to the pump best I can. Everything there looks to be in order. Yet this morning, the truck wont start…. Crank / no start. Suspect the same demon today.
Anyone have any insight to this for me? I don’t believe there to be anything wrong with the pump itself. I’ve ran what I believe to be enough drygas thru the system to get water out. And the truck has gas in the tank J
As an aside; this morning when it would not start (crank/no start) was after 5-6 days of rain up here in the northeast.
Thanks in advance for any advice & wisdom.
I have a ’91 D250 with the 360-gas engine. I am experiencing a very intermittent crank/no start condition. . I have been suffering thru this for the past 6 months or so. I touch or jiggle wires, stuff works sometimes. Months go by, it pops up again unexpectedly and the same touch/jiggle doesn’t work.
First time I ran into the issue, I found the ‘hose clamp’ that holds the fuel pump in the tank broken and the pump was sitting up, unseated. I replaced the clamp, put some dry gas in a fresh tank of gas and all seemed well.
Few months go by, truck dies while driving. Get it towed home, nothing is obviously wrong. I shake the fuel pump wires once and turn the key on – hear the fuel pump working, and the truck fires right up.
It seems that the fuel pump is not getting juice when the key is on or cranking may cause the condition. I have service manuals and have voltage at the relay under the hood, and connector at the pump.
I have inspected the fuel-pump connector that goes to the pump best I can. Everything there looks to be in order. Yet this morning, the truck wont start…. Crank / no start. Suspect the same demon today.
Anyone have any insight to this for me? I don’t believe there to be anything wrong with the pump itself. I’ve ran what I believe to be enough drygas thru the system to get water out. And the truck has gas in the tank J
As an aside; this morning when it would not start (crank/no start) was after 5-6 days of rain up here in the northeast.
Thanks in advance for any advice & wisdom.
Captain
Joined: Sep 2005
Posts: 550
Likes: 1
From: Colorado
RE: 91 D250 Gas Wont start - crank/no start
Probably a bad hall effect sensor in the distributor. The computer needs to see pulses from this sensor or it shuts down the ASD relay and fuel and ignition.
Joined: May 2007
Posts: 7
Likes: 0
RE: 91 D250 Gas Wont start - crank/no start
Hello!!
I have a simmilar problem with a 1992 ramcharger limited. I drove for about 4 hours and got home. The next morning the engine ran for a few seconds and then stopped. After that, i simply could not start the engine. There was no spark. Replaced the ignition coil, thepickup coil and the same condition remained. Inspected the wires, checked forhigh impedance and everythingseems to be incomplete order. The ASD relay is alsoingood working condition, in fact, when turning the key to on,youcan hear the fuel pumpfor half a second andthe ignition voltage goes near 12Volts for this period of time. When cranking the ignition voltage remains zeroand after a few seconds you can smell the odor of gas through the throttle body, but no spark at all.
Is there any way to simulate the pulses that the pickup coil generates in order to test the engine controller?
Any help will be really appreciated
Thank you!!
Moises Franco
P.S. Please excuse my awful english.
I have a simmilar problem with a 1992 ramcharger limited. I drove for about 4 hours and got home. The next morning the engine ran for a few seconds and then stopped. After that, i simply could not start the engine. There was no spark. Replaced the ignition coil, thepickup coil and the same condition remained. Inspected the wires, checked forhigh impedance and everythingseems to be incomplete order. The ASD relay is alsoingood working condition, in fact, when turning the key to on,youcan hear the fuel pumpfor half a second andthe ignition voltage goes near 12Volts for this period of time. When cranking the ignition voltage remains zeroand after a few seconds you can smell the odor of gas through the throttle body, but no spark at all.
Is there any way to simulate the pulses that the pickup coil generates in order to test the engine controller?
Any help will be really appreciated
Thank you!!
Moises Franco
P.S. Please excuse my awful english.