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Troubles with 94 ford 4.0 ranger

Burns rich missfires wont start after run awhile spark at all plugs fuel pressure ok

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  • Ford Master
  • 21,873 Answers

Are there any trouble codes stored in the computer ? Will it start if you disable the fuel pump ?

Posted on Feb 09, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 114 Answers

SOURCE: 2002 gmc yukon, rich fuel code, low fuel pressure @40

you may have two oxugen sensors on your yukon. if so the oxygen sensor that controls that bank may be bad. from what you mentioned in your complaint, it sounds like it is the oxygen sensor.

Posted on Dec 24, 2008

  • 543 Answers

SOURCE: 94 saturn 1.9L flooding out

i bet the coolant temp sensor is bad,,,when the sensor cracks coolant leaks into and wrecks it and then the coolant leaks thru the sensor and into the harness,,,and this causes the car to dump too much fuel because the computer is seeing a temp that is not real and therefore the air fuel mixture is off and flooding the car,,,typical issue,replace the coolant temp sensor and then harness,,like $75 for both at saturn,,do not by the aftermarket ones,yes the cost less but they are junk and will not work either,,,also i bet if you put the gas pedal to the floor or pump it when this happens i bet the car starts and smokes when it does,,,,saturn redsigned the sensor for this reason,it was plastic and they made it brass so now it can not crack and leak,the aftermarket ones are still plastic junk

Posted on Oct 09, 2009

  • 1857 Answers

SOURCE: 94 toyota land cruiser runs rich, rough idle, no power

You have a fuel injected car. Things that can cause too rich would be a bad altitude sensor like the map or mass air flow depending on which one you have.
Anything that would cause excess air to go into the exhaust system like a cracked exhaust pipe before the 02 sensor, or low compression, or a stuck open pcv valve, intake gaskets, throttle body base gasket.
Or a Throttle position sensor which is telling the computer you foot is on the gas when it is not.
Its possible you have a bad PCM,, or coolant temp sensor saying the motor is still cold as its warming up.
Its possible you have a vacuum hose somewhere on the engine with a big crack in it or its just inplugged and you dont see it.

But my first guess would be possibly a bad computer.
Try creating a big vacuum leak when its loading up. It should run better.

Also if you have an egr valve it could be stuck open a little causing excess air or an idle air control valve stuck open.

Does it clean up if you rev it up or does it blow black smoke reved and at idle. This could point towards the altitude sensor.

Posted on Dec 22, 2009

roniecon
  • 6826 Answers

SOURCE: ford ranger 4 cyl 94. won't start. fuel pump works

Check the timing belt,most likely has jumped time.

Posted on Jan 17, 2010

cansmo
  • 2431 Answers

SOURCE: 1989 Ford Ranger 2.3l. Won't

The fuel pressure has to to 35 to 45 psi. And no low fuel pressure will not cause no injector pulse.The veicle sounds more like a idle air control problem why? because as you stated it runs rough when it does start.Get it to start sysle the key you will hear the fuel pump go on cycle it three times then start it up. when the vehicle warms up take the idle air valve out and clean it with carburator cleaner or even brake cleaner you may even want to do the throttle body itself this should help with the hard start up and rough running

Posted on Aug 15, 2011

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1 Answer

Will not start but turns over


Fuel or spark plug trouble could be a cause for an engine not starting. Check for spark plug spark. Remove spark plug wire and see if the wire makes a spark on engine when spark plug wire is energized. Do not tounch engine or come in contact so that you are shocked when testing for spark plug action. Check fuel pump to see if fuel is being supplied. Disconnect fuel line and place the fuel line inside a container to capture fuel. Do not cause a fire from loss of control of fuel line during trouble shooting.

Jun 19, 2014 | 1998 Ford Ranger SuperCab

1 Answer

Got fuel and spark but it wont start


If it is the 4 cyl engine, have you checked to see if the timing belt is ok and the engine has compression ?
If it has compression, and the plugs are wet, they could be fuel fouled.
I would try a new set of plugs, check the fuel pressure to make sure it is within spec, and check all plugs for spark.

Dec 08, 2012 | 1998 Ford Ranger

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MY 2004 Ford Ranger engine turns over but wont start.


Are you getting fire?have you checked your fuel filter and coil pack

Dec 08, 2012 | 2004 Ford Ranger

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94 Ford Ranger starting problems


I would check the coolant temp sensor.

Mar 10, 2010 | 1994 Ford Ranger Supercab

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TWO DAYS AGO 94 RANGER (4 CYL) SOHC...STOPPED ON ROAD. CRANKS BUT DOES NOT START. HAS FUEL PRESSURE. CHANGED FUEL FILTER. CHANGED AIR FILTER. CHANGED ONE OF THE DISTRIBUTOR COILS...TWO SPARK WIRES WERE NOT...


If all the coils are giving spark now,then you moat likely have gas fouled plugs now,so change them out with new ones,all 8 of them.If you do not have spark on all plug wires,pull the timing belt cover,and align the cam shaft and the cam,to see if the belt has jumped.If It hasn`t,replace the crankshaft sensor.

Oct 17, 2009 | 1994 Ford Ranger Supercab

1 Answer

Wont pass inspection fuel is to rich


I WOULD CHANGE YOUR OXYGEN SENSORS AND GIVE IT A COMPLETE TUNE UP MINE DID THE SAME THING AFTER I DID ALL THIS IT FIXED THE PROBLEM

Aug 03, 2009 | 1994 Ford Ranger Supercab

1 Answer

Put on analyzer number 4 cycliner is missfiring


Replace the spark plugs and wire set and add fuel injector cleaner in the gas tank for the next three fill up's. If money is tight try swapping the spark plug wire with another wire and see if the missfire moves, but before you do that inspect the spark plug's condition. Remove the spark plug to see if it's fouled with carbon which is a run rich condition and if there was detonation the plugs will have a worn or damaged electrode. Keep me posted, be glad to help.

Jun 30, 2009 | 2000 Ford Contour

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