Question about 2001 Ford Ranger Regular Cab

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2001 ford ranger 3.0 litre engine runs rough, backfires thru intake and exhaust, and gets red hot before the cats in minutes, this engine was out of a 2003 ranger and i replaced the intake with the 2001 ranger, any ideans, cats plugged???

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Sure the exhaust could be plugged anywhere so unbolt it at the engine still haging on and drive the car if it's loud and runns good your right but if it still acts up then the timing chain may have skipped. It caould have a big vacume leak between the intake and the heads as the manifold may have a different gasket angle and it's not sealing. but this isn't as likly as the exhaust being stopped up and the old engine may have failed as the cat was clogged in front of the old engine.

Posted on Sep 05, 2010

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Sounds like the initial timing is way off. is the firing order correct?

cam position sensor installed correctly?

Posted on Sep 05, 2010

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Posted on Jan 02, 2017

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SOURCE: no power rough idle car stalls strong exhaust smell

have you done a reaaly good tune up on the car? I would suggest replaceing the idle air control valve first, the a really good set of plugs and wires. I would also reccomend that you check the fuel regulator to be certain it is getting the required vacum to operate the release valve and let the fuel flow back into the tank.

Posted on Apr 01, 2009

fastboyz
  • 674 Answers

SOURCE: 1992 Ford Ranger 2.3L 4cyl. 5-speed

what you realy need to do is check your fuel pressure. it sound like a fuel pressure regulator . but ive also seen a dirty fuel system and defective fuel pumps do the same thing.

Posted on Aug 28, 2008

pctech1
  • 1940 Answers

SOURCE: my ford 2002 escape runs rough. misfire on

Six separate ignition coils:

  • are mounted directly above each spark plug.
  • are controlled by the powertrain control module (PCM) for correct firing sequence.
Crankshaft position (CKP) sensor:
NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees before top dead center (BTDC) and is not adjustable.
  • is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger pulse wheel located on the crankshaft located inside the engine front cover.
The PCM uses this information to determine ignition coil turn ON and turn OFF times and misfire detection.

The Misfire Detection Monitor is an on-board strategy designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. The Misfire Detection Monitor will be enabled only when certain base engine conditions are first satisfied. Input from the ECT or CHT, MAF and CKP sensors is required to enable the monitor. The Misfire Detection Monitor is also performed during on demand self-test.

The PCM synchronized ignition spark is based on information received from the CKP sensor. The CKP signal generated is also the main input used in determining cylinder misfire.
The input signal generated by the CKP sensor is derived by sensing the passage of teeth from the crankshaft position wheel mounted on the end of the crankshaft.
The input signal to the PCM is then used to calculate the time between CKP edges and also crankshaft rotational velocity and acceleration. By comparing the accelerations of each cylinder event, the power loss of each cylinder is determined. When the power loss of a particular cylinder is sufficiently less than a calibrated value and other criteria is met, then the suspect cylinder is determined to have misfired.

Misfire type A:
  • Upon detection of a Misfire type A (200 revolutions) which would cause catalyst damage, the MIL will blink once per second during the actual misfire, and a DTC will be stored.
Misfire type B:
  • Upon detection of a Misfire type B (1000 revolutions) which will exceed the emissions threshold or cause a vehicle to fail an inspection and maintenance tailpipe emissions test, the MIL will illuminate and a DTC will be stored.
The DTC associated with multiple cylinder misfire for a Type A or Type B misfire is DTC P0300.

The DTCs associated with an individual cylinder misfire for a Type A or Type B misfire are DTCs P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309 and P0310.

When the coil is fired by the PCM, spark is delivered through the matched pair towers to their respective spark plugs (in this case, Cylinder 2 & 6 are matched). The spark plugs are fired simultaneously and are paired so that as one fires on the compression stroke, the other spark plug fires on the exhaust stroke. The next time the coil is fired the situation is reversed. The next pair of spark plugs fire according to the engine firing order.

Since there is only a misfire being detected on the Cylinder 6, I would recommend replacing the Coil On Plug for Cylinder 6 and check the wiring for damage for Cylinder 6.

Posted on Jun 24, 2011

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what you realy need to do is check your fuel pressure. it sound like a fuel pressure regulator . but ive also seen a dirty fuel system and defective fuel pumps do the same thing.

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