Question about 1988 Ford Ranger

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Runs when cold, stalls when hot

1985 ford ranger, starts up and runs great when cold. when it heats up it stalls and fuel pressure drops. its fuel injected.

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  • yeti151 Jul 21, 2009

    yeah that seems to be the popular consensus.

  • yadayada
    yadayada May 11, 2010

    replace the fuel pump



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Have you tried changing your fuel filter. Not saying that is what it is but when you first start your truck it runs good and the longer it runs the more your fuel pressure drops. It is possible that the longer it runs the more trash the filter is picking up and begins to stall but when you turn the truck off the sediment in the filter settles allowing the truck to restart.

Posted on Jul 21, 2009

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Check that crank sensor

Posted on Jul 21, 2009


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1 Answer

What could cause my 1990 ranger 4.0 not to start when it is cold besides a fuel problem

If your vech. is fuel injected, check your cold start valve. It sprays a bit of fuel when its cold to assist. In starting.

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the fuel pressure regulator is not functioning right and it's letting to much fuel in to the injectors or the fuel return line to the canister or from the canister back to the tank is kinked or blocked

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Why does my 1985 ford ranger keeps dying or stalling out

Based on your info you should be able to duplicate the problem on demand.
When the engine won't start, you need to figure out if it is fuel or ignition related to proceed.
Check to see if the plugs are firing, and if not check the coil, and see if the carb has fuel in it.
Ford products built in the 1980s had problems with the ignition module mounted on the side of the distributor but you may have replaced it already.

Jul 20, 2012 | 1985 Ford Ranger

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Ford ranger 1996 4.0L v6 single cab long bed it runs but you have 2 have your foot on the gas it does not stay in idle for more than 5min less than that usually it does not take much gas pedal pressure to...

I would suspect that you have a failing fuel pump, the fuel pump pressure is bleeding off due to a faulty check valve, this causes hard starting esp when cold or after sitting. The fuel pump is located inside the fuel tank, the fuel tank must be removed to replace the fuel pump assembly.

Feb 09, 2012 | 1996 Ford Ranger SuperCab

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I think you have a blown head gasket, getting oil in the water is an indication of this. Oil pressure is higher than water pressure in the engine. However you should also check the thermostatic fan clutch, when the engine heats up it should activate and the fan should run the same RPM as the engine, when cold it should free wheel. Hope this helps, let me know.

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When i've been driving for a while, it stalls out and won't start-acting like it's starving for fuel. after it sits and cools down for a couple of hours then it starts and runs fine. Fuel pump??

Change the fuel filter. It is usually located passenger side along the frame rail ahead of the rear tire. You're right, it's starving for gas & because of this your fuel line is heating up & causing vapor lock. This is why your car won't start when hot. Good luck!

Jul 27, 2010 | 1998 Ford Taurus

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