Question about 2006 Jeep Liberty

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What could this be?

Changed spark plugs and installed new fuel injector 1, when I press on the gas to pick up speed the car bucks and when it is idle there is a hard shake and the malfunction indicator light is on. It blinks when I drive but if I am idle it is just a constant light. THese are the codes that come up p301, p0300, p0201

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First back track everything that you changed, it seems that either the coil on cylinder 1 is bad or trying to see if fuel is leaking from around the # 1 injector.

Posted on Oct 16, 2013

Testimonial: "We changed the coil on cylinder 1 no change, no fuel is leaking around injector 1"

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CODE 301 IS #1 MISSFIRE 300 IS RANDOM MISS FIRE 201 IS INJECTOR FAULT . I WOULD START BY SWAPPING # 1 INJECTOR WITH SAY # 3 AND SEE IF THE MISSFIRE MOVES TO #3 IF SO REPLACE INJECTOR, IF NOT THERE COULD BE WIREING ISSUES

Posted on Oct 16, 2013

Testimonial: "I took the vehicle to firestone, they checked the injector it is working,they were thinking it could be the pcm."

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Posted on Jan 02, 2017

Big Poppa Ma
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SOURCE: Malfunction Indicator light on and flashing.

check the fuel pump and fuel filter

Posted on Dec 07, 2008

  • 6982 Answers

SOURCE: Malfunctioning Indicator Light still on....

Check the injector for proper voltage. Check the cam sensor,,,,,DO NOT remove it unless you index it to the block. generally, a malfunction of the sensor will affect all cylinders, PS: you did check to make sure there is adequate spark at #1 plug, right?

Posted on Dec 11, 2008

  • 38 Answers

SOURCE: my 96 v6 4.0 grand cherokee is reading these codes

douple ck all the ground wiresto engine,trans bell housing ,battery or frame/firewall look for any that may have separated from any pack of wires or broken off eyelets then thightnen all points,,.these grounds are very important to comp/injection controls and can cause a multi code problem like yours.

Posted on May 07, 2009

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2 Answers

P301, p0300, p0201


Your vehicles computer should have the malfunction codes stored in it.

Some mechanics will check the codes for you. And some auto parts stores offer the service as well.

Oct 16, 2013 | Jeep Liberty Cars & Trucks

1 Answer

Fuel pump relay


Check:
1. Fuel pump pressure.
2. MAF (Mass Air Flow) sensor.
3. Spark plug gaps.
3. Air induction system.
4. Fuel injectors.
5. Cylinder compression.
6. Catalytic converter or honey comb porcelain.
7. Brake system.

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Are you pulling a trailer or have a heavy load - you should not drive in overdrive in those conditions. You will eventually ruin your transmission.

May 19, 2013 | 1994 Oldsmobile Cutlass Supreme

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My 1995 kia sportage is loosing power, wenever i accelerate it does not pick up speed quickly, so overtaking is a major problem, and the engile idling is too high! past the 1 mark almost 1 and a half. what...


Timing issue needs to be checked out first with a timing gun and maybe adjusted accordingly, There are mivor maintanences that you can do like put injector cleaner into gas tank which will clean your fuel injectors and opens it up so more gas gets into the piston heads. Simple things does wonders. Also you can put a cleaner to where the throttle is at on top of engine so it does not stick. Have you yet put new spark plugs or distributor cap and rotor because if you did would make this same problem with timing. If you changed the distributor cap and rotor and did not replace the old one with the new one in the exact same place is why timing could be off by an hair or two.

Jun 18, 2011 | 1995 Kia Sportage

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Car dies out when I accelerate. Idles ok. Its getting gas but when I take off it stalls


There are 3 likely causes for your problem. It could be any 1 or a combination of the 3.
  1. Bad MAF (Mass Air Flow) sensor
  2. Clogged or bad fuel injector
  3. Bad TPS (Throttle Position Sensor) This controls idle speed when the engine is cold, warm, or with the AC on.
Most often it's #3. Most large auto parts stores will perform a complimentary diagnostic test on your car. This will give you error codes stored in the car's computer and allow you to hone in on the problem.

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My '01 impala 3.4 v-6 flat spots when COLD, at around 20mph. the idle is ruff with random misfires. acceleration is overall poor. when HOT, most symptoms go away leaving only some slight acceleration...


depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

1.Defective spark plugs
2.Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4.False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

--------- This should help.Keep updated.Thanks.Helpmech.

Mar 27, 2011 | 2001 Chevrolet Impala

2 Answers

I have a 1994 toyota pickup 1/2 ton, and i have to press the gas pedal when i'm on stop light, because if not the engine goes off


YOU NEED TO ADJUST IDLE SPEED TO 750 RPM FOR THE 2.4L ENGINE AND THE 3.0L ENGINE IDLE SPEED NEEDS TO BE 800 RPM.THAT IS THE REASON WHY TRUCK STALLING YOU NEED REALLY TUNE UP ENGINE THEN ADJUST IDLE SPEED.

Mar 01, 2011 | 1994 Toyota Pickup

3 Answers

#5 piston not working correctly.


you may need a new fuel injector. or a intake gasket. here is a tip ;with the engine running spray starting fluid or a carb cleaner around the intake at the #5 cylinder if there is any change in idle you need to replace the intake gasket if no change replace the fuel injector

Apr 05, 2010 | 2003 Buick Rendezvous

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Engine runs rough at idle and bucks at highway speed. Check engine light was on after fuel injector cleaner was added to gas, the chek engine light ent off.Scan tool indicated no. 1 cylinder misfire prior...


I had a similar problem in a 1994 Taurus, and after spending nearly 300$ on ignition parts, it turns out the problem was a bad spark plug wire that cost me 8.88$ to replace.

Mar 01, 2010 | 2001 Ford Taurus

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