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97 Ford Ranger Stalling

I have a 97, 2.3 standard Ford Ranger w/ 197,000 mi.  It stalls almost every time i come to a stop, idles rough (shakes), looses significant power up hills, has a hard time starting after it stalls, and the check engine light was on. the shop ran diagnostics.  i've had the spark plugs & wires replaced, MAF sensor replaced, a fuel injector replaced, yet the #4 valve gives misfire codes during diagnostics. i've also had them run a carbon cleaner to clean things out 3 times!  during the numerous trips to the shop, they discovered my catalytic converter has ran so hot that its been ''gutted'' the mechanics say, it's hollow.  A few years ago my truck was losing power, no stalling, and the coil packs and fuel filter were replaced.  it ran fine — for about 4 months and since then, it's gotten worse and to this point I'm at today. any ideas?

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  • doug12ax7 May 11, 2009

    Thanks Steeler Ed!  After I posted this, I spoke with the mechanic to get a run down of everything they did again, running a compression test was one of the things they did and the compression was okay, there was no fuel leak or break and no restriction in the exhaust system. The mechanic was certain that replacing the bad fuel injector would make the valve fire properly, but it didn't.  However, he feels the problem is with the valve but was mystified as to what.  What does "seating" mean?  Is it the same as a misfire?  Just curious, are you a Steeler Fan?  That's great, so am I. I'm from the area and work in Pgh.

  • Steeler Ed May 11, 2010

    Yes, I am a Steeler fan from Eastern PA. A properly seated valve means that it fully closes during each cycle. (A complete seal between the valve face and seat.) Usually, the valve won't seat properly if it is burnt or stuck. However, it would show low compression if it wasn't closing properly.

    Could you post all the codes that were stored in your Ranger's computer?

    Depending on the codes, I'd probably check fuel pressure along the rails and at each injector. It would be interesting to find out if the mechanic already checked for vacuum leaks and the idle air control valve. I've also seen an engine that had a piece of paper clogging the air intake between the air filter and engine. Sometimes the codes aren't exact in pointing to the real problem.




  • Steeler Ed May 11, 2010

    I'd run a compression test on all the cylinders. I wouldn't be surprised if you have a valve not seating properly after 197,000 miles. Usually the fuel injector is the main problem, but if you already replaced it, I'd look for a compression leak.

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Posted on Jan 02, 2017

  • 314 Answers

SOURCE: mis fire on cylinder 4

First off you want to make sure that you have the correct firing order down. When you rearranged the spark plug wires you might have made the firing order off and that could cause the misfire to get worse. the things that you should do to isolate the problem is to perform compression tests, fuel injectors, and also check the entire ignition system

Posted on Jun 26, 2009

badealer888
  • 414 Answers

SOURCE: Horrible Idle, Then Engine stalls

Sounds like the copper seal that the old owner put in quit working.

a lemon is still a lemon no matter how sour.

Posted on Jul 07, 2009

  • 2 Answers

SOURCE: 1996 Ford Windstar engine runs rough

DIS ignition, no distributor to " get in there " with....

Posted on Jul 10, 2009

johnjohn2
  • 5763 Answers

SOURCE: Truck not firing properly front coil pack not firing at all.

if this truck has an o2 sensor i would replace that and also make sure the cat-converter is not plugged,this would give you your powerloss and egr code,next is your coil,this may be caused by the computer or your crank sensor,look at the tone ring that the crank sensor uses and make sure its not missing teeth or broken,also check all your fuses.

Posted on Jun 12, 2010

  • 5495 Answers

SOURCE: I have a 2003 ford

Check for Intake Manifold leaks with either a water mist from a spray bottle or Choke cleaner. Do this while the engine is running and you will know about a leak with an RPM change. I read about some intakes were 2 piece and the intermediate gasket leaks.

Also you could clean the MAF on the air intake with Electric cleaner. If you have an old fashion Vacuum gauge you could plug in and see how steady Valves are closing by watching the Vacuum bounce from misfires.

Would like to know results on this case.

Posted on Nov 03, 2010

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