Question about Ford Ranger

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1991 ford ranger 2.3L manual, no air, lopes underway, wants to stall at take off. What is cause?

I have done a complete tune-up and also replaced the engine control module. Tune-up with new wires, plugs, distributor sending unit, air filter. I do not have any check engine light or indicator there is a problem. The hoses seem OK in the emissions but I may be wrong. Can anyone tell me what the problem might be? While driving the truck will lope and when descending in speed it has a slight buck. It wants to stall out when I take off from a dead stop. Idles fine, starts OK, but when driving or trying to drive it will hiccup, lope, stumble. Thanks for any help you can give. There are 136,000 miles on the truck.

Posted by Anonymous on

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  • Ford Master
  • 6,098 Answers

The problem could be plugged up catalytic convert it is related to tune up.One more thing fuel filter too. Check auto zone if they have anything to burn out catalytic.When you change with standard catalytic you will have code PO420 will be a headache!!!!!!!! 80% cars have this problem Think twice before doing anything.

Posted on Apr 14, 2017

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6 Suggested Answers

6ya6ya

6ya staff

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SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 1 Answer

SOURCE: 1997 Grand Cherokee stalls at speed and at stop signs

Mine does the same thing when the oxygen senor goes out... About every 70k miles. doesn't always turn on check engine light

Posted on Feb 16, 2009

Anonymous

  • 23 Answers

SOURCE: 87 Iroc (305 TPI) runs rough, lopes and lacks...

SOUNDS LIKE A VACUM LEAK,POSSIBLY INTAKE GASKET OR VACUM HOSES,GET SOME BERKIBLE 2+2 SPRAY DOWN INTAKES WHERE MEET HEAD AROND THROTTLE BODY AND ALSO EGR VALVE TO MAKE SURE IT ISN'T PARTAILY STUCK OPEN, VACUM LINES AIR INTAKE HOSE BETWEEN THROTTLE BODY AND AIR FLOW METER,ALSO MAKE SURE ITS NOT DRY ROTTED AND SUCKING AIR,THE ENGINE IDLE SHOULD GO UP OR DOWN DEPENDING HOW BIG THE LEAK

Posted on May 17, 2009

FtheT

  • 22 Answers

SOURCE: 2001 Forester, Rough idle and engine loping driving at low rpm

I had a similar problem on my 2002 Impreza RS 2.5 (same engine and engine control system). In my case it was the O2 sensor on the intake manifold. This happened at 34,xxx mi. so it was covered by the warranty. Replacing the part is very easy. (two bolts and a wiring harness). Obviously I would start simple and cheap and work your way to expensive and difficult.
From my understanding its all caused from the engine missfiring. If its been a while or never, I'd change the spark plugs first. (stick with the Subaru Parts plugs, I went after market and the dealer claimed the plugs were not the correct "temperature" and had to pay for the new plugs and install although they did it without my permition. Thats a whole nother story).
Could also be the manifold pressure sensor.
Either 02 or manifold pressure sensor may cause intermitent check engine light.
Where I live Brookline,MA , Autozone will run a free diagnostic on your car by hooking up to your ECU and will give you the trouble codes and possible remidies. Of course there are no guarentee's but it will point you in the right direction.
Good Luck

Posted on Jun 18, 2009

dttech

dttech

  • 4803 Answers

SOURCE: I have a 93 mercury topaz 4cyl 2.3L that stalls

It sounds to me like you replaced everything but the most likely cause of a stall while driving...The crank sensor.

Posted on Oct 11, 2009

Greg Stefan

  • 462 Answers

SOURCE: I have a 95 nissan sentra and it keeps idling

Check vacuum leaks , by spraying carburator cleaner around intake manifold gasket and vacuum hoses connections . See if engine picks up the idle speed while you doing it , and if it does , locate leak and fix it. Most common , intake manifold gasket brakes.

Posted on Jul 20, 2010

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