Question about 2006 Jeep Wrangler 4.0

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Engine surges at 2300RPM

I've have replaced the cam position sensor as sugested by a friend but still when i hold the accelerator to the floor the engine surges between 2300RPM and 2800RPM and refuses to rev any higher please help me.

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  • stephen stoodley Oct 30, 2012

    By the way its a 6 speed manual

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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 Oct 30, 2012

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Posted on Jan 02, 2017

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csmock132
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SOURCE: 89 wrangler 2.5 5 speed.replaced crank sensor last

It sounds like your new crank sensor is defective. It should be under warranty.

Posted on Sep 02, 2009

herbalgarden
  • 344 Answers

SOURCE: 95 2.5 jeep wrangler stalls consistantly and will

I had the same issue with my 4.0, I went through all the same BS you did and in the end it was a faulty fuel pump. Pricy i know but im sure thats your problem

Posted on Nov 15, 2009

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