Question about 2002 Jeep Liberty

1 Answer

Fouls 3 spark plugs on drivers side, rough idle new plugs 3 times ,new converter and o2 on drivers side. new tp sensor new MAP, new IAC what causes this

Posted by on

Ad

1 Answer

I will guess. Give me a lot of leeway here

Only me,BUT,if I got 3 plugs fouled twice,I would halt everything.

There would be no new converter,O2 Sensor,that was damaged, as a result of your issues,UNTIL, I solved the cause of their failure.

The TPS,MAP and IAC ,ONLY get replaced when I,just me again, have used a VOM or Oscilloscope to test,AND, the testing proved they were bad.

So, I think, a dry and wet cylinder compression test,a cylinder leak down test, a coolant pressure test,a check for combustibles in coolant,and even an exhaust gas reading,just to start a list of things to do,would be necessary, to tell you why the plugs are fouling.

If I went the wrong way,on oil or coolant fouling,just maybe a bad fuel pressure regulator,BUT only 3 plugs,THAT'S THE KEY

You got a bad head gasket or intake gasket
The TPS,MAP and IAC were replaced ,due to a guess and not testing.
If this was a dealer,they installed a converter and never attempted to solve the cause of failure. (Overheating,Rich Fuel Mixture or Coolant Contamination)

Posted on Oct 01, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

HOW DO I INSTALL A TPS ON MY 2000 CADILLAC DEVILLE 4.6 ENGINE?


Throttle Position Sensor Replacement
Remove the idle air control (IAC) electrical connector (1) from the IAC sensor (4).
Remove the manifold absolute pressure (MAP) sensor electrical connector from the MAP sensor.
Remove the water pump belt cover.
Remove the TP sensor retaining screws electrical connector (2) from the TP sensor (3).
Remove the TP sensor electrical connector (2) from the TP sensor (3).
May have video on youtube showing how to

Dec 06, 2016 | 2000 Cadillac DeVille

2 Answers

Cherry red exhaust


check that your map sensor is getting direct vacuum. if it's mounted directly on the throttle body, take it off and see that the vacuum passage is not clogged up. also check that it is getting voltage and that the computer sees it. Your map sensor and tps are responsible for how much fuel goes into the engine when you are driving; the o2 pretty much only regulates idle mixture. also see that your egr is not stuck open.

Mar 17, 2013 | Cars & Trucks

1 Answer

1997 pontiac bonneville ssei got a O2 sensor bad code, replaced the sensor and still get the same code


when all else fails go to a pep boys or Firestone, let them check it. You cant by - pass good service and new tools. Advance Auto Parts has the handheld device

Jun 08, 2017 | 1997 Pontiac Bonneville

1 Answer

Where is the throttle position sensor on my 2004 4.2


S&T Series Blazer, Bravada, Envoy, Jimmy, Rainier, Trailblazer, Xtreme
Throttle Position Sensor (TPS)

Print


Removal & Installation

  1. Remove the idle air control (IAC) electrical connector (1) from the IAC sensor (4).
  2. Remove the manifold absolute pressure (MAP) sensor electrical connector from the MAP sensor.
  3. Remove the water pump belt cover.
  4. Remove the TP sensor retaining screws electrical connector (2) from the TP sensor (3).
  5. Remove the TP sensor electrical connector (2) from the TP sensor (3).

    0996b43f80202874.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Detaching electrical connectors prior to TP sensor removal


    0996b43f80202875.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Identifying components for removal of the TP Sensor


To install:
  1. Install the new O-ring on to the TP sensor.
  2. Connect the TP Sensor electrical connector (2) to the TP sensor (3).
  3. Install the TP sensor (2) on to the throttle body (1). Tighten the TP sensor screws to 2.3 Nm (20 inch lbs.).
  4. Connect the IAC electrical connector (1) to the IAC sensor (4).
  5. Connect the MAP sensor electrical connector to the MAP sensor.
  6. Install the water pump belt and tensioner cover.
  7. Perform the TP Sensor learn procedure:
  8. Turn the ignition to the RUN/ON position.
  9. Wait 1 minute.
  10. Turn the ignition to the LOCK/OFF position

Jul 31, 2012 | 2004 GMC Envoy

1 Answer

1987 chevy r20 rough idle


Well, the computer is supposed to open the IAC to keep the RPM above 600 or so depending on the load on the engine.
If you have voltage and ground for the IAC it should raise idle speed to at least 1100 when you first start the engine cold.
If that is not happening, I would look for carbon build up in the throttle body. You can apply voltage to the IAC and open it to see if the air passage is open too.

Jul 25, 2012 | 1987 Chevrolet R20

1 Answer

VERY ROUGH IDLE NO EXCELERATION


Try a few if these ideas...

Priority Action Part Type Cause
1 Inspect Spark Plug Fouled, Damaged, or Broken Spark Plug(s).
2 Inspect Hose (PCV) Clogged or Collapsed PCV Hoses.
3 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s).
4 Inspect Distributor Worn, Damaged or Faulty Distributor.
5 Inspect Catalytic Converter Clogged or Faulty Catalytic Converter.
6 Inspect Fuel Pump Low Fuel Pressure.
7 Inspect TimingSet Slipped TimingChain or Worn TimingGear(s).
8 Inspect Knock Sensor Improperly Connected or Faulty Knock Sensor.
9 Inspect M.A.P. (Manifold Absolute Pressure) Sensor Faulty M.A.P. Sensor.
10 Inspect Throttle Position Sensor Faulty or Incorrectly Connected Throttle Position Sensor.
11 Inspect Mass Air Flow (MAF) Sensor Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.
12 Inspect Air Cleaner Temperature Sensor Damaged or Faulty Air Cleaner Tempature Sensor.
13 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator.
14 Inspect Piston Ring Set Worn or Broken Piston Rings.
15 Inspect Timing Specification Incorrect Ignition Timing.
16 Inspect Fuel System Pressure Incorrect Fuel Pressure Being Delivered to Carburetor or Fuel Injection System.
17 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
18 Inspect PCV Valve Plugged or Damaged PCV Valve.
19 Inspect Valve Burned, Worn, or Sticking Exhaust Valves.
20 check idle stop solenoid - if faulty, could cause rough idling
21 inspect distributor cap/rotor - if burnt, could cause loss of acceleration

Apr 18, 2011 | Chevrolet Cavalier Cars & Trucks

1 Answer

How do you replace the throttle position sensor


Removal & Installation
  1. Remove the idle air control (IAC) electrical connector (1) from the IAC sensor (4).
  2. Remove the manifold absolute pressure (MAP) sensor electrical connector from the MAP sensor.
  3. Remove the water pump belt cover.
  4. Remove the TP sensor retaining screws electrical connector (2) from the TP sensor (3).
  5. Remove the TP sensor electrical connector (2) from the TP sensor (3).


57f7d68.gif

Detaching electrical connectors prior to TP sensor removal



6244f87.gif

Identifying components for removal of the TP Sensor


To install:
  1. Install the new O-ring on to the TP sensor.
  2. Connect the TP Sensor electrical connector (2) to the TP sensor (3).
  3. Install the TP sensor (2) on to the throttle body (1). Tighten the TP sensor screws to 2.3 Nm (20 inch lbs.).
  4. Connect the IAC electrical connector (1) to the IAC sensor (4).
  5. Connect the MAP sensor electrical connector to the MAP sensor.
  6. Install the water pump belt and tensioner cover.
  7. Perform the TP Sensor learn procedure:
  8. Turn the ignition to the RUN/ON position.
  9. Wait 1 minute.
  10. Turn the ignition to the LOCK/OFF position.

May 12, 2010 | 2000 GMC Jimmy

1 Answer

94 camry. 2.2 fed emissions. Rough idle. runs great any rpm off idle. have checked timing. vacuum leaks, plugs, spark, removed throttle body and iac and cleaned. removed egr. plugged intake. all with no...


Before we both knock ourselves out with fuel injector testing. Hook up a Digital voltmeter (DVM) to upstream O2 sensor and lets see how she is burning. Remember positive lead of DVM to signal wire and negative lead to ground. Anything above 550 mV is rich anything below 350mV is lean. Be mindful that an exhaust leak the size of a pin hole in this region can cause a rough idle. A healthy reading should bounce between 550mV and 350 mV.
Next to test is O2 is working block off air in take making mixture rich and see what O2 says about it . Then pull off a vacuum hose (a lean condition) and see if DVM drops to 200to 300mV's.
Keep me posted.

May 10, 2010 | 1994 Toyota Camry

1 Answer

Bad idle


It's probably not the throttle position sensor, but rather the wiring that goes to the sensor. Also your plugs or plug should not be black unless it is oil fouled or carbon fouled. Carbon fouled would indicate an over rich mixture problem. Wet and black would indicate oil fouling. You need to check the oxygen sensor also. A false indication from it would could cause a rich fuel condition. Start with the wiring to the TPS switch. Last but not least check your map sensor and the vacuum hose running to it. All these items contribute to the overall fuel delivery system and how it functions.

Aug 17, 2009 | 1993 Ford Ranger SuperCab

Not finding what you are looking for?
2002 Jeep Liberty Logo

321 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

77169 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...