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1997 mercury mountaineer isn't starting turns over just fine, it used to star for about five to ten minutes but it would just die, I've tried replacing the battery, that wasn't it, put a new fuel filt

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  • Cars & Trucks Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Jan 06, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1997 jimmy 4.3L 4x4 wont start

I had the very same problem with my 97' jimmy. I finally replace the ignition wiring harness. That controls the electrical going to the dash. Blinkers, gauges, fuel pump, I also replaced the Key switch just in case. Started right up all gauges work,blinkers everything.

Posted on Mar 30, 2009

  • 9 Answers

SOURCE: 1997 jeep wrangler 4.0 5

I had this problem with my 97 when it hit around 80,000 miles and it turned out to be a bad fuel injector. Replaced all 6 and it has been fine ever since.

Posted on Apr 15, 2009

csmock132
  • 4669 Answers

SOURCE: 96 s10 2.2 4cyl. running lean

I know you said new fuel pump and filter but I would recheck the fuel pressure. Drive the vehicle with the fuel pressure gauge on it and see if the pressure drops after 10 minutes.

Posted on Sep 02, 2009

Testimonial: "Thanks for your suggestions. It was the new 2 wk old fuel pump that was bad. Problem solved!"

emissionwiz
  • 76109 Answers

SOURCE: 1997 Mercury Mountaineer What is Catalyst Efficiency Below (Bank

it means the catalyst is worn out, the efficiency is monitored by sensors, when the Cat falls below a certain reading or "threshold" the code is generating telling u that u need a new catalytic converter.

Posted on Feb 18, 2010

  • 373 Answers

SOURCE: 1991 Dodge Dynasty LE

Sounds like you are having a fuel problem with the fuel filter. If you have not had your car serviced in quite awhile i would do so. At least change the fuel filter and check the air filter as well. Hope thias will help you.

Posted on May 28, 2010

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