Question about 2004 Chrysler Pacifica

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204 Pacifica: At a stop light engine started to run rough, check engine light illuminated, and it appears that the computer control unit engaged a solenoid locking the accelerator. After a couple of restarts of the engine, the accelerator was unlocked and the engine ran smoothly. The check Engine light is still illuminate. I suspect it may extinguish after a predetermine number of restarts. That being said whatever the problem is, it will likely resurface and the accelerator once again engaged into some kind of limp home mode. Any ideal which sensors or component failures maybe activating the above limp home mode?

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SOURCE: wife washed engine got air intake soaked K&N

Hey, I think you are looking in the wrong area. The 5.7l distributer and rotor buttons are prone to getting wet. You need to remove the cap and clean the rotor, distrib cap and any internal components you can see. Good luck. Also check the plug wires to see if they are wet. Cheers

Posted on Jan 05, 2010

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Why is my1997 bmw Z3 1.9 start rough for 2min then is ok


The EGR valve opens when the engine is warming up, which allows exhaust to enter the intake manifold. This is essentially "extra air" coming into the engine. The engine has an "idle speed control" function, which is either a solenoid or small stepper motor connected to a valve that allows a controlled amount of air to "sneak" by the throttle plate in the throttle body. Fundamentally, it is the amount of air entering a fuel injected engine that controls engine RPM. A defective idle speed control ("ISC) motor or solenoid can cause the problem you stated. (I do not know which type is used in your BMW.) Often, a check engine light will illuminate of the engine computer cannot adequately regualte engine idle speed.

Aug 27, 2014 | 1997 BMW Z3 Roadster

1 Answer

Acceleration won't go past 3000 PRM at idle


The car does have a maf, but it is rarely the cause of rough idle. Rough idle is usually caused by vacuum leak, pvc issues, or idle air control valve. What does it do, specifically, and is the engine light on?

Jul 23, 2017 | 2005 Chrysler Pacifica

1 Answer

My 2006 Chrysler pacifica will start running rough and won't accelerate after driving slow or sitting at a stop light but it only does it some times. You can turn it off and let it set for a few s


The problem exists because codes are only an
indication of a system fault

You use the codes to compnent test & only replace
a part if found to be bad

Improper way to diagnose things--start over

Dec 16, 2012 | 2006 Chrysler Pacifica

1 Answer

Runs rough only at idle


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.

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1 Answer

97 honda civic idles rough and again at around 55 mph starts to run rough again


When the light comes on, one or more diagnostic trouble codes (DTC) are stored in the engine control module. These DTCs remain even if the light goes out. To address a Check Engine Light problem, the DTCs are retrieved and the appropriate troubleshooting information is followed in order to determine the problem.

The four most common Check Engine Light scenarios and what to do:
* The Check Engine Light turns on and off or flickers.
If the Check Engine Light comes on in the city but goes off on the freeway, then the fault is present during city driving conditions. Pay attention to whether or not the vehicle runs or drives any differently when the Check Engine Light illuminates. If vehicle performance does change, drive the car as little as possible and take it to be checked by a service professional as soon as possible. If there is no change in vehicle performance, you can drive home, but have it inspected as soon as possible. In this condition, you run a risk of the vehicle dying or not starting.

* The Check Engine Light comes on and stays on.
If the Check Engine Light illuminates constantly during driving with no noticeable driving or performance problems, there is a permanent fault in the emission control system. When this happens, the computer that controls the emission system usually has a backup program that runs while the fault is present. (These backup programs are often referred to as "limp home" mode programs.) You should get the vehicle serviced as soon as possible, but in most cases, the vehicle will continue to operate, though you run a risk of it dying or not starting.

* The Check Engine Light illuminates, stays on, and there are performance problems.
This means that a vital component of your emission control and engine management system has a serious problem. It usually involves a component or system needed for the vehicle to run at all. In most cases, drive the vehicle as little as possible. In many cases, the vehicle is not safe to drive at all -it could stop or stall out at any moment. It is best to pull over to a safe place and have the vehicle towed to an automotive diagnostician for a thorough inspection and repair.

* The Check Engine Light light comes on and blinks in a steady pattern while driving.
Don't confuse this steady pulsing of the Check Engine Light light (usually one or more flashes per second) with a flicker (see above). The Check Engine Light may stay on steadily or it may flash when the vehicle is accelerated. This is very serious. There is a severe failure of the emission control system that is causing the engine to misfire to the point that the catalytic converter is damaged each time the Check Engine Light flashes. It may mean that the catalytic converter is overheating to the point that it will glow red or, in extreme cases, start a fire on the underside of the vehicle. Immediately pull over to a safe place and have your vehicle towed to an automotive diagnostician for repair. Vehicles can be severely damaged and even destroyed by fire if this condition is ignored for too long.

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1 Answer

Idle good when cold, hotter it gets the worst it idles especially when sitting at stop lights


simple test for a vacuum brake booster
star and run the engine at idle without applying the foot brake
if it gets worse when the foot brake is applied , it is a vacuum leak in the booster ( replace the booster )
otherwise check for failed vacuum hoses including under dash control lines , vacuum leak at the manifold or EGR unit

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1 Answer

Engine runs rough at idle, and wont exceed 3500 rpm, ever.


Is this the 5-cylinder engine? Is the 'check engine' light illuminated on the dash? If the 'check engine' light is illuminated, does it ever blink while the engine is running rough?

Aug 05, 2011 | 2008 Isuzu I 370

2 Answers

The orange light came on today in my 2004 chrysler pacifica. What does tht light mean?? Is it the engine light?


Without seeing a picture I couldn't say for sure, but typically the check engine light is orange and shaped like a motor. There is no way for you to know off hand what the problem is that caused it to light up, I recommend you go to your local Autozone, they can plug into the computer and check the cause of the fault for free.

May 18, 2011 | 2004 Chrysler Pacifica

1 Answer

I have a 95 cavalier. I have had a new control module and 2 new coils installed. I have new spark plug and wires. I have a new heat sensor. My problem is. Im driving down the road and my idle is rough at...


There is a part called a throttle positin sensor which would do very much as you described it.The sensor cannot detect how much gas you are giving it nor does it know how much gas is being delivered.It is also an input for the control module which tells the rest of the system how to react.The symptoms of sudden acceleration and slowness could also be the transmission(not very likely though),but the rough idle and strange acceleration appear to be more likely the sensor.The transmission would likely have other symptoms such as rough shifting,gears winding out if you know what I mean,shifting back and forth between gears at a certain speed in which you are just at the same speed,meaning not accelerating or slowing down,say just cruising at 35 mph.Also,there are no lights because the check engine light HAS to be the worst thing ever invented for a car.It illuminates for things even when your car is running fine,but you would think for something like your situation,SOMETHING would illuminate.People have spent thousands replacing everything which the computer tells them from the check engine light diagnostic,yet it remains on.I have seen it.If you are in the USA,call any AAA approved shop and they would likely say something similar.Good luck,Greg

Mar 02, 2011 | 2004 Chevrolet Cavalier

1 Answer

2003 DODGE NEON RUNS ROUGH


Try cleaning the EGR valve first



electronic Tempture Control
ECT sensor
symptoms
Potential Symptoms

Symptoms of a P0118 could include:

* Very poor fuel economy
* A no start condition
* Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring
* Illumination of MIL
EGR valve

Usually a fault in the control circuit, will leave no noticeable symptoms other than the Malfunction Indicator Lamp (MIL) illumination. However, if the EGR control solenoid
is stuck open due to debris, etc. the code may be accompanied by misfire under acceleration, rough idle, or engine dying altogether.

Dec 22, 2008 | Dodge Neon Cars & Trucks

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