Question about 1992 Ford Ranger

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93 ranger 2.3 skips when ideling dont skip after engine speeds up

Put in new plugs and wires

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  • Anonymous Feb 19, 2009

    I have a 92 ford ranger 2.9 v 6 idel speeds up and down when cold not as bad when it warms up but also ldel rough when warm



6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: 2003 Mustang engine skipping when accelerating

Does it idle fine? Sounds like a vacuum leak.

Posted on Apr 26, 2009

  • 500 Answers

SOURCE: 1999 Ford OHV Exployer skips and misfire even with tune-up

pull the exhaust off and see if it runs better, if it does it needs catylitic converters- could also have bad fuel injectors.

Posted on May 29, 2009

  • 453 Answers

SOURCE: Have a 1998 F-150 XLT, 4.6 (6) Windsor Engine.

Could be the coil pack should be read in ohms about 7 to be good

Posted on Jul 13, 2009

  • 90 Answers

SOURCE: code p0302

Look at the wire and plug to cylinder 2, for cracks or damage, if nothing is found run a compression test need 100psi min, and then check the injector, you need to meshure resistance with a multimeter, and compare to other injectors something like 12 to 15 ohms would be good i think.

Posted on Dec 31, 2009

  • 8826 Answers

SOURCE: rough idel and no power on my 95 aspire changed

Check for leaking vaccum lines from the engine intake manifold. If no leak, test the IAC motor and clean out the air bypass passages per instructions below. Let me know if this doesn't solve the problem or you have any questions.

The Idle Air Control Bypass Air (IAC BPA) valve consists of an idle air control valve and a bypass air valve. The bypass air valve functions during cold engine conditions to increase engine idle speed. It consists of a thermowax bead and a valve.
Engine coolant is directed around the thermowax, which opens and closes the valve. During cold engine operation below 140°F (60°C), the thermowax is contracted enough to allow the valve to open. As the coolant heats, the thermowax begins to expand. When the coolant reaches temperatures above 140°F (60°C), the thermowax expands and closes the valve.
The valve controls the amount of throttle valve bypass, which ensures a smooth idle under all engine operating conditions.

  1. When the engine is cold, air flows through the valve during all modes of engine operation, to maintain the factory set idle speed.

TESTING See Figures 1, 2 and 3 (if you don't have an ohmmeter, skip this test)

  1. To check the Idle Air Control (IAC) valve resistance, unplug the IAC valve connector.
  2. Connect a high impedance Digital Volt Ohmmeter (DVOM) to the terminals.
  3. Measure the resistance.
  4. The resistance should be 7.7-9.3 ohms.
  5. If the resistance does not meet specification, replace the IAC BPA assembly.

Fig. Fig. 2: Connect an ohmmeter to the IAC valve; the resistance should be 7.7-9.3 ohms

At this point, if your IAC checks good, I recommend you take out the 4 screws seen above, remove the motor, and clean out the air passages/valve with carb cleaner. Also remove the big (3 inch diameter) hose from the throttle and clean out the throttle body, if dirty.

If the IAC tests bad, go to the removal and installation directions below.

The next test requires a scanner. If you don't have a scanner, skip this test.

  1. To check the BPA valve function, remove the BPA valve from the engine.
  2. Wait until the valve reaches room temperature. When the valve is cold, blow through the air inlet and verify that air flows freely through the valve.
  3. Heat the valve with a hair dryer; the air valve should move out and block the passage.
  4. If the valve does not function as specified, replace the IAC BPA assembly.
  5. To test the solenoid, connect a scan tool to the Data Link Connector (DLC).
  6. Turn the key ON and enter the simulation test.
  7. Access the IACV Parameter Identification (PID) and turn the dial to cycle at 75 degrees.
  8. Listen for the IAC solenoid to click when using the simulation test.
  9. If the solenoid clicks it is working properly.

Fig. Fig. 3: Idle Air Control Bypass Air (IAC BPA) valve assembly components


  1. Disconnect the negative battery cable.
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
  1. Drain the coolant until it is at a level below the Idle Air Control Bypass Air (IAC BPA) valve.
The lower coolant line should be disconnected after the valve is separated from the upper intake manifold.
  1. Tag and disconnect the upper coolant hose from the valve.
  2. Unplug the valves electrical connector, then loosen the two nuts and two bolts attaching the valve to the upper intake manifold.
  3. Pull the valve from the manifold and disconnect the lower coolant line from the valve.
  4. Remove the valve and gasket from the engine.
To install:
  1. Use a scraper to clean any old gasket material from the valve mounting surface.
  2. Install a new gasket and connect the lower coolant line to the valve.
  3. Install the valve and its retainers. Tighten the nuts and bolts to 71-88 inch lbs. (8-10 Nm).
  4. Engage the valves electrical connection and the coolant hoses to the valve.
  5. Fill the cooling system and connect the negative battery cable.

Posted on Dec 05, 2010

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Some of the older model trucks even though they run on OBDII systems, they may not have a monitor for the plugs misfiring codes.

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I would check your fuel injector for fouling
When they foul the will develop a drip
Causing a fuel fluctuation that will have O2 sensors reporting rich and lean voltage changes
This causes the pcm to adjust injector pulses making them shorter and longer.
causing more fuel or less fuel.
From this condition you may see plug fouling.
Also check for leaking or faulty fuel pressure regulator or restricted return line.
Most of the time it wont be a bad O2 sensor the O2 sensor is just doing its job.
You also have already changed the plugs and Map so there already out of the way.
If this helps please give me some feed back
Hope this works for you FixYa

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